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2020-12-22kasan, mm: untag page address in free_reserved_areaVincenzo Frascino1-0/+5
free_reserved_area() memsets the pages belonging to a given memory area. As that memory hasn't been allocated via page_alloc, the KASAN tags that those pages have are 0x00. As the result the memset might result in a tag mismatch. Untag the address to avoid spurious faults. Link: https://lkml.kernel.org/r/ebef6425f4468d063e2f09c1b62ccbb2236b71d3.1606161801.git.andreyknvl@google.com Cc: Andrew Morton <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: mte: switch GCR_EL1 in kernel entry and exitVincenzo Frascino6-4/+79
When MTE is present, the GCR_EL1 register contains the tags mask that allows to exclude tags from the random generation via the IRG instruction. With the introduction of the new Tag-Based KASAN API that provides a mechanism to reserve tags for special reasons, the MTE implementation has to make sure that the GCR_EL1 setting for the kernel does not affect the userspace processes and viceversa. Save and restore the kernel/user mask in GCR_EL1 in kernel entry and exit. Link: https://lkml.kernel.org/r/578b03294708cc7258fad0dc9c2a2e809e5a8214.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Co-developed-by: Andrey Konovalov <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: mte: convert gcr_user into an exclude maskVincenzo Frascino2-15/+16
The gcr_user mask is a per thread mask that represents the tags that are excluded from random generation when the Memory Tagging Extension is present and an 'irg' instruction is invoked. gcr_user affects the behavior on EL0 only. Currently that mask is an include mask and it is controlled by the user via prctl() while GCR_EL1 accepts an exclude mask. Convert the include mask into an exclude one to make it easier the register setting. Note: This change will affect gcr_kernel (for EL1) introduced with a future patch. Link: https://lkml.kernel.org/r/946dd31be833b660334c4f93410acf6d6c4cf3c4.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: kasan: allow enabling in-kernel MTEVincenzo Frascino3-3/+33
Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) feature and requires it to be enabled. MTE supports This patch adds a new mte_enable_kernel() helper, that enables MTE in Synchronous mode in EL1 and is intended to be called from KASAN runtime during initialization. The Tag Checking operation causes a synchronous data abort as a consequence of a tag check fault when MTE is configured in synchronous mode. As part of this change enable match-all tag for EL1 to allow the kernel to access user pages without faulting. This is required because the kernel does not have knowledge of the tags set by the user in a page. Note: For MTE, the TCF bit field in SCTLR_EL1 affects only EL1 in a similar way as TCF0 affects EL0. MTE that is built on top of the Top Byte Ignore (TBI) feature hence we enable it as part of this patch as well. Link: https://lkml.kernel.org/r/7352b0a0899af65c2785416c8ca6bf3845b66fa1.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Co-developed-by: Andrey Konovalov <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: mte: add in-kernel tag fault handlerVincenzo Frascino3-0/+70
Add the implementation of the in-kernel fault handler. When a tag fault happens on a kernel address: * MTE is disabled on the current CPU, * the execution continues. When a tag fault happens on a user address: * the kernel executes do_bad_area() and panics. The tag fault handler for kernel addresses is currently empty and will be filled in by a future commit. Link: https://lkml.kernel.org/r/20201203102628.GB2224@gaia Link: https://lkml.kernel.org/r/ad31529b073e22840b7a2246172c2b67747ed7c4.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Co-developed-by: Andrey Konovalov <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Catalin Marinas <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> [[email protected]: ensure CONFIG_ARM64_PAN is enabled with MTE] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: mte: reset the page tag in page->flagsVincenzo Frascino4-0/+32
The hardware tag-based KASAN for compatibility with the other modes stores the tag associated to a page in page->flags. Due to this the kernel faults on access when it allocates a page with an initial tag and the user changes the tags. Reset the tag associated by the kernel to a page in all the meaningful places to prevent kernel faults on access. Note: An alternative to this approach could be to modify page_to_virt(). This though could end up being racy, in fact if a CPU checks the PG_mte_tagged bit and decides that the page is not tagged but another CPU maps the same with PROT_MTE and becomes tagged the subsequent kernel access would fail. Link: https://lkml.kernel.org/r/9073d4e973747a6f78d5bdd7ebe17f290d087096.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: mte: add in-kernel MTE helpersVincenzo Frascino6-6/+150
Provide helper functions to manipulate allocation and pointer tags for kernel addresses. Low-level helper functions (mte_assign_*, written in assembly) operate tag values from the [0x0, 0xF] range. High-level helper functions (mte_get/set_*) use the [0xF0, 0xFF] range to preserve compatibility with normal kernel pointers that have 0xFF in their top byte. MTE_GRANULE_SIZE and related definitions are moved to mte-def.h header that doesn't have any dependencies and is safe to include into any low-level header. Link: https://lkml.kernel.org/r/c31bf759b4411b2d98cdd801eb928e241584fd1f.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Co-developed-by: Andrey Konovalov <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22arm64: enable armv8.5-a asm-arch optionVincenzo Frascino2-0/+9
Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) which is an armv8.5-a architecture extension. Enable the correct asm option when the compiler supports it in order to allow the usage of ALTERNATIVE()s with MTE instructions. Link: https://lkml.kernel.org/r/d03d1157124ea3532eaeb77507988733f5734986.1606161801.git.andreyknvl@google.com Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: introduce CONFIG_KASAN_HW_TAGSAndrey Konovalov1-17/+44
This patch adds a configuration option for a new KASAN mode called hardware tag-based KASAN. This mode uses the memory tagging approach like the software tag-based mode, but relies on arm64 Memory Tagging Extension feature for tag management and access checking. Link: https://lkml.kernel.org/r/44906a209d3a44f9c6f5a21841e90988e365601e.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Co-developed-by: Vincenzo Frascino <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: separate metadata_fetch_row for each modeAndrey Konovalov4-29/+45
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Rework print_memory_metadata() to make it agnostic with regard to the way metadata is stored. Allow providing a separate metadata_fetch_row() implementation for each KASAN mode. Hardware tag-based KASAN will provide its own implementation that doesn't use shadow memory. No functional changes for software modes. Link: https://lkml.kernel.org/r/5fb1ec0152bb1f521505017800387ec3e36ffe18.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename SHADOW layout macros to METAAndrey Konovalov1-15/+15
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Hardware tag-based KASAN won't be using shadow memory, but will reuse these macros. Rename "SHADOW" to implementation-neutral "META". No functional changes. Link: https://lkml.kernel.org/r/f96244ec59dc17db35173ec352c5592b14aefaf8.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename print_shadow_for_address to print_memory_metadataAndrey Konovalov1-3/+3
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Hardware tag-based KASAN won't be using shadow memory, but will reuse this function. Rename "shadow" to implementation-neutral "metadata". No functional changes. Link: https://lkml.kernel.org/r/dd955c5aadaee16aef451a6189d19172166a23f5.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename addr_has_shadow to addr_has_metadataAndrey Konovalov3-5/+5
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Hardware tag-based KASAN won't be using shadow memory, but will reuse this function. Rename "shadow" to implementation-neutral "metadata". No functional changes. Link: https://lkml.kernel.org/r/370466fba590a4596b55ffd38adfd990f8886db4.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan, arm64: rename kasan_init_tags and mark as __initAndrey Konovalov4-5/+5
Rename kasan_init_tags() to kasan_init_sw_tags() as the upcoming hardware tag-based KASAN mode will have its own initialization routine. Also similarly to kasan_init() mark kasan_init_tags() as __init. Link: https://lkml.kernel.org/r/71e52af72a09f4b50c8042f16101c60e50649fbb.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan, arm64: move initialization messageAndrey Konovalov4-17/+11
Software tag-based KASAN mode is fully initialized with kasan_init_tags(), while the generic mode only requires kasan_init(). Move the initialization message for tag-based mode into kasan_init_tags(). Also fix pr_fmt() usage for KASAN code: generic.c doesn't need it as it doesn't use any printing functions; tag-based mode should use "kasan:" instead of KBUILD_MODNAME (which stands for file name). Link: https://lkml.kernel.org/r/29a30ea4e1750450dd1f693d25b7b6cb05913ecf.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan, arm64: only use kasan_depth for software modesAndrey Konovalov6-14/+23
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Hardware tag-based KASAN won't use kasan_depth. Only define and use it when one of the software KASAN modes are enabled. No functional changes for software modes. Link: https://lkml.kernel.org/r/e16f15aeda90bc7fb4dfc2e243a14b74cc5c8219.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan, arm64: only init shadow for software modesAndrey Konovalov2-3/+20
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Hardware tag-based KASAN won't be using shadow memory. Only initialize it when one of the software KASAN modes are enabled. No functional changes for software modes. Link: https://lkml.kernel.org/r/d1742eea2cd728d150d49b144e49b6433405c7ba.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Marco Elver <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: decode stack frame only with KASAN_STACK_ENABLEAndrey Konovalov3-162/+168
Decoding routines aren't needed when CONFIG_KASAN_STACK_ENABLE is not enabled. Currently only generic KASAN mode implements stack error reporting. No functional changes for software modes. Link: https://lkml.kernel.org/r/05a24db36f5ec876af876a299bbea98c29468ebd.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: hide invalid free check implementationAndrey Konovalov4-18/+19
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. For software KASAN modes the check is based on the value in the shadow memory. Hardware tag-based KASAN won't be using shadow, so hide the implementation of the check in check_invalid_free(). Also simplify the code for software tag-based mode. No functional changes for software modes. Link: https://lkml.kernel.org/r/d01534a4b977f97d87515dc590e6348e1406de81.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: don't duplicate config dependenciesAndrey Konovalov1-6/+2
Both KASAN_GENERIC and KASAN_SW_TAGS have common dependencies, move those to KASAN. Link: https://lkml.kernel.org/r/c1cc0d562608a318c607afe22db5ec2a7af72e47.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename report and tags filesAndrey Konovalov5-9/+9
Rename generic_report.c to report_generic.c and tags_report.c to report_sw_tags.c, as their content is more relevant to report.c file. Also rename tags.c to sw_tags.c to better reflect that this file contains code for software tag-based mode. No functional changes. Link: https://lkml.kernel.org/r/a6105d416da97d389580015afed66c4c3cfd4c08.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: define KASAN_MEMORY_PER_SHADOW_PAGEAndrey Konovalov3-15/+13
Define KASAN_MEMORY_PER_SHADOW_PAGE as (KASAN_GRANULE_SIZE << PAGE_SHIFT), which is the same as (KASAN_GRANULE_SIZE * PAGE_SIZE) for software modes that use shadow memory, and use it across KASAN code to simplify it. Link: https://lkml.kernel.org/r/8329391cfe14b5cffd3decf3b5c535b6ce21eef6.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: split out shadow.c from common.cAndrey Konovalov3-487/+510
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. The new mode won't be using shadow memory. Move all shadow-related code to shadow.c, which is only enabled for software KASAN modes that use shadow memory. No functional changes for software modes. Link: https://lkml.kernel.org/r/17d95cfa7d5cf9c4fcd9bf415f2a8dea911668df.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: only build init.c for software modesAndrey Konovalov2-4/+4
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. The new mode won't be using shadow memory, so only build init.c that contains shadow initialization code for software modes. No functional changes for software modes. Link: https://lkml.kernel.org/r/bae0a6a35b7a9b1a443803c1a55e6e3fecc311c9.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_*Andrey Konovalov10-45/+46
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. The new mode won't be using shadow memory, but will still use the concept of memory granules. Each memory granule maps to a single metadata entry: 8 bytes per one shadow byte for generic mode, 16 bytes per one shadow byte for software tag-based mode, and 16 bytes per one allocation tag for hardware tag-based mode. Rename KASAN_SHADOW_SCALE_SIZE to KASAN_GRANULE_SIZE, and KASAN_SHADOW_MASK to KASAN_GRANULE_MASK. Also use MASK when used as a mask, otherwise use SIZE. No functional changes. Link: https://lkml.kernel.org/r/939b5754e47f528a6e6a6f28ffc5815d8d128033.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: rename (un)poison_shadow to (un)poison_rangeAndrey Konovalov7-42/+47
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. The new mode won't be using shadow memory. Rename external annotation kasan_unpoison_shadow() to kasan_unpoison_range(), and introduce internal functions (un)poison_range() (without kasan_ prefix). Co-developed-by: Marco Elver <[email protected]> Link: https://lkml.kernel.org/r/fccdcaa13dc6b2211bf363d6c6d499279a54fe3a.1606161801.git.andreyknvl@google.com Signed-off-by: Marco Elver <[email protected]> Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: shadow declarations only for software modesAndrey Konovalov1-16/+32
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Group shadow-related KASAN function declarations and only define them for the two existing software modes. No functional changes for software modes. Link: https://lkml.kernel.org/r/35126.1606402815@turing-police Link: https://lore.kernel.org/linux-arm-kernel/24105.1606397102@turing-police/ Link: https://lkml.kernel.org/r/e88d94eff94db883a65dca52e1736d80d28dd9bc.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Valdis Kletnieks <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> [[email protected]: fix build issue with asmlinkage] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: group vmalloc codeAndrey Konovalov2-56/+63
This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Group all vmalloc-related function declarations in include/linux/kasan.h, and their implementations in mm/kasan/common.c. No functional changes. Link: https://lkml.kernel.org/r/80a6fdd29b039962843bd6cf22ce2643a7c8904e.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: KASAN_VMALLOC depends on KASAN_GENERICAndrey Konovalov1-1/+1
Currently only generic KASAN mode supports vmalloc, reflect that in the config. Link: https://lkml.kernel.org/r/0c493d3a065ad95b04313d00244e884a7e2498ff.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22kasan: drop unnecessary GPL text from comment headersAndrey Konovalov8-45/+0
Patch series "kasan: add hardware tag-based mode for arm64", v11. This patchset adds a new hardware tag-based mode to KASAN [1]. The new mode is similar to the existing software tag-based KASAN, but relies on arm64 Memory Tagging Extension (MTE) [2] to perform memory and pointer tagging (instead of shadow memory and compiler instrumentation). This patchset is co-developed and tested by Vincenzo Frascino <[email protected]>. This patchset is available here: https://github.com/xairy/linux/tree/up-kasan-mte-v11 For testing in QEMU hardware tag-based KASAN requires: 1. QEMU built from master [4] (use "-machine virt,mte=on -cpu max" arguments to run). 2. GCC version 10. [1] https://www.kernel.org/doc/html/latest/dev-tools/kasan.html [2] https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/enhancing-memory-safety [3] git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux for-next/mte [4] https://github.com/qemu/qemu ====== Overview The underlying ideas of the approach used by hardware tag-based KASAN are: 1. By relying on the Top Byte Ignore (TBI) arm64 CPU feature, pointer tags are stored in the top byte of each kernel pointer. 2. With the Memory Tagging Extension (MTE) arm64 CPU feature, memory tags for kernel memory allocations are stored in a dedicated memory not accessible via normal instuctions. 3. On each memory allocation, a random tag is generated, embedded it into the returned pointer, and the corresponding memory is tagged with the same tag value. 4. With MTE the CPU performs a check on each memory access to make sure that the pointer tag matches the memory tag. 5. On a tag mismatch the CPU generates a tag fault, and a KASAN report is printed. Same as other KASAN modes, hardware tag-based KASAN is intended as a debugging feature at this point. ====== Rationale There are two main reasons for this new hardware tag-based mode: 1. Previously implemented software tag-based KASAN is being successfully used on dogfood testing devices due to its low memory overhead (as initially planned). The new hardware mode keeps the same low memory overhead, and is expected to have significantly lower performance impact, due to the tag checks being performed by the hardware. Therefore the new mode can be used as a better alternative in dogfood testing for hardware that supports MTE. 2. The new mode lays the groundwork for the planned in-kernel MTE-based memory corruption mitigation to be used in production. ====== Technical details Considering the implementation perspective, hardware tag-based KASAN is almost identical to the software mode. The key difference is using MTE for assigning and checking tags. Compared to the software mode, the hardware mode uses 4 bits per tag, as dictated by MTE. Pointer tags are stored in bits [56:60), the top 4 bits have the normal value 0xF. Having less distict tags increases the probablity of false negatives (from ~1/256 to ~1/16) in certain cases. Only synchronous exceptions are set up and used by hardware tag-based KASAN. ====== Benchmarks Note: all measurements have been performed with software emulation of Memory Tagging Extension, performance numbers for hardware tag-based KASAN on the actual hardware are expected to be better. Boot time [1]: * 2.8 sec for clean kernel * 5.7 sec for hardware tag-based KASAN * 11.8 sec for software tag-based KASAN * 11.6 sec for generic KASAN Slab memory usage after boot [2]: * 7.0 kb for clean kernel * 9.7 kb for hardware tag-based KASAN * 9.7 kb for software tag-based KASAN * 41.3 kb for generic KASAN Measurements have been performed with: * defconfig-based configs * Manually built QEMU master * QEMU arguments: -machine virt,mte=on -cpu max * CONFIG_KASAN_STACK_ENABLE disabled * CONFIG_KASAN_INLINE enabled * clang-10 as the compiler and gcc-10 as the assembler [1] Time before the ext4 driver is initialized. [2] Measured as `cat /proc/meminfo | grep Slab`. ====== Notes The cover letter for software tag-based KASAN patchset can be found here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0116523cfffa62aeb5aa3b85ce7419f3dae0c1b8 ===== Tags Tested-by: Vincenzo Frascino <[email protected]> This patch (of 41): Don't mention "GNU General Public License version 2" text explicitly, as it's already covered by the SPDX-License-Identifier. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/6ea9f5f4aa9dbbffa0d0c0a780b37699a4531034.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Branislav Rankov <[email protected]> Cc: Kevin Brodsky <[email protected]> Cc: Vasily Gorbik <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-22MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORKLukas Bulwahn1-1/+1
The current pattern in the file entry does not make the files in the governors subdirectory to be a part of the CPU IDLE TIME MANAGEMENT FRAMEWORK. Adjust the file pattern to include files in governors. Signed-off-by: Lukas Bulwahn <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2020-12-22ext4: remove unnecessary wbc parameter from ext4_bio_write_pageLei Chen3-4/+3
ext4_bio_write_page does not need wbc parameter, since its parameter io contains the io_wbc field. The io::io_wbc is initialized by ext4_io_submit_init which is called in ext4_writepages and ext4_writepage functions prior to ext4_bio_write_page. Therefor, when ext4_bio_write_page is called, wbc info has already been included in io parameter. Signed-off-by: Lei Chen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Theodore Ts'o <[email protected]>
2020-12-22ext4: avoid s_mb_prefetch to be zero in individual scenariosChunguang Xu1-4/+5
Commit cfd732377221 ("ext4: add prefetching for block allocation bitmaps") introduced block bitmap prefetch, and expects to read block bitmaps of flex_bg through an IO. However, it seems to ignore the value range of s_log_groups_per_flex. In the scenario where the value of s_log_groups_per_flex is greater than 27, s_mb_prefetch or s_mb_prefetch_limit will overflow, cause a divide zero exception. In addition, the logic of calculating nr is also flawed, because the size of flexbg is fixed during a single mount, but s_mb_prefetch can be modified, which causes nr to fail to meet the value condition of [1, flexbg_size]. To solve this problem, we need to set the upper limit of s_mb_prefetch. Since we expect to load block bitmaps of a flex_bg through an IO, we can consider determining a reasonable upper limit among the IO limit parameters. After consideration, we chose BLK_MAX_SEGMENT_SIZE. This is a good choice to solve divide zero problem and avoiding performance degradation. [ Some minor code simplifications to make the changes easy to follow -- TYT ] Reported-by: Tosk Robot <[email protected]> Signed-off-by: Chunguang Xu <[email protected]> Reviewed-by: Samuel Liao <[email protected]> Reviewed-by: Andreas Dilger <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Theodore Ts'o <[email protected]>
2020-12-22ext4: defer saving error info from atomic contextJan Kara2-37/+104
When filesystem inconsistency is detected with group locked, we currently try to modify superblock to store error there without blocking. However this can cause superblock checksum failures (or DIF/DIX failure) when the superblock is just being written out. Make error handling code just store error information in ext4_sb_info structure and copy it to on-disk superblock only in ext4_commit_super(). In case of error happening with group locked, we just postpone the superblock flushing to a workqueue. [ Added fixup so that s_first_error_* does not get updated after the file system is remounted. Also added fix for syzbot failure. - Ted ] Signed-off-by: Jan Kara <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Theodore Ts'o <[email protected]> Cc: Hillf Danton <[email protected]> Reported-by: [email protected]
2020-12-22Merge branch 'pm-cpufreq'Rafael J. Wysocki10-220/+388
* pm-cpufreq: cpufreq: intel_pstate: Use most recent guaranteed performance values cpufreq: intel_pstate: Implement the ->adjust_perf() callback cpufreq: Add special-purpose fast-switching callback for drivers cpufreq: schedutil: Add util to struct sg_cpu cppc_cpufreq: replace per-cpu data array with a list cppc_cpufreq: expose information on frequency domains cppc_cpufreq: clarify support for coordination types cppc_cpufreq: use policy->cpu as driver of frequency setting ACPI: processor: fix NONE coordination for domain mapping failure ACPI: processor: Drop duplicate setting of shared_cpu_map
2020-12-22hwmon: (k10temp) Remove support for displaying voltage and current on Zen CPUsGuenter Roeck1-98/+0
Voltages and current are reported by Zen CPUs. However, the means to do so is undocumented, changes from CPU to CPU, and the raw data is not calibrated. Calibration information is available, but again not documented. This results in less than perfect user experience, up to concerns that loading the driver might possibly damage the hardware (by reporting out-of range voltages). Effectively support for reporting voltages and current is not maintainable. Drop it. Cc: Artem S. Tashkinov <[email protected]> Cc: Wei Huang <[email protected]> Tested-by: Wei Huang <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2020-12-22block: update some copyrightsChristoph Hellwig3-0/+4
Update copyrights for files that have gotten some major rewrites lately. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Johannes Thumshirn <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-12-22block: remove a pointless self-reference in block_dev.cChristoph Hellwig1-2/+0
There is no point in duplicating the file name in the top of the file comment. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Johannes Thumshirn <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-12-22MAINTAINERS: add fs/block_dev.c to the block sectionChristoph Hellwig1-0/+1
fs/block_dev.c is a pretty integral part of the block layer, so make sure it is mentioned in MAINTAINERS. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Johannes Thumshirn <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-12-22ALSA/hda: apply jack fixup for the Acer Veriton N4640G/N6640G/N2510GChris Chiu1-0/+3
This Acer Veriton N4640G/N6640G/N2510G desktops have 2 headphone jacks(front and rear), and a separate Mic In jack. The rear headphone jack is actually a line out jack but always silent while playing audio. The front 'Mic In' also fails the jack sensing. Apply the ALC269_FIXUP_LIFEBOOK to have all audio jacks to work as expected. Signed-off-by: Chris Chiu <[email protected]> Signed-off-by: Jian-Hong Pan <[email protected]> Cc: <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Takashi Iwai <[email protected]>
2020-12-22ALSA: hda/realtek: Apply jack fixup for Quanta NL3Chris Chiu1-0/+1
The Quanta NL3 laptop has both a headphone output jack and a headset jack, on the right edge of the chassis. The pin information suggests that both of these are at the Front. The PulseAudio is confused to differentiate them so one of the jack can neither get the jack sense working nor the audio output. The ALC269_FIXUP_LIFEBOOK chained with ALC269_FIXUP_QUANTA_MUTE can help to differentiate 2 jacks and get the 'Auto-Mute Mode' working correctly. Signed-off-by: Chris Chiu <[email protected]> Cc: <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Takashi Iwai <[email protected]>
2020-12-22dm cache: simplify the return expression of load_mapping()Zheng Yongjun1-6/+1
Simplify the return expression. Signed-off-by: Zheng Yongjun <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
2020-12-22Merge branches 'acpi-scan', 'acpi-pnp' and 'acpi-sleep'Rafael J. Wysocki6-330/+598
* acpi-scan: ACPI: scan: Add Intel Baytrail Mailbox Device to acpi_ignore_dep_ids ACPI: scan: Avoid unnecessary second pass in acpi_bus_scan() ACPI: scan: Defer enumeration of devices with _DEP lists ACPI: scan: Evaluate _DEP before adding the device * acpi-pnp: ACPI: PNP: compare the string length in the matching_id() * acpi-sleep: ACPI: PM: s2idle: Move x86-specific code to the x86 directory ACPI: PM: s2idle: Add AMD support to handle _DSM
2020-12-22ALSA: usb-audio: Add implicit feeback support for the BOSS GT-1Mike Oliphant1-0/+2
The BOSS GT-1 (USB ID 0582:01d6) requires implicit feedback like other similar BOSS devices. This patch adds this support. [ rearranged the table entry in the ID order -- tiwai ] Signed-off-by: Mike Oliphant <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Takashi Iwai <[email protected]>
2020-12-21RISC-V: Fix usage of memblock_enforce_memory_limitAtish Patra1-1/+1
memblock_enforce_memory_limit accepts the maximum memory size not the maximum address that can be handled by kernel. Fix the function invocation accordingly. Fixes: 1bd14a66ee52 ("RISC-V: Remove any memblock representing unusable memory area") Cc: [email protected] Reported-by: Bin Meng <[email protected]> Tested-by: Bin Meng <[email protected]> Acked-by: Mike Rapoport <[email protected]> Signed-off-by: Atish Patra <[email protected]> Signed-off-by: Palmer Dabbelt <[email protected]>
2020-12-22exfat: Avoid allocating upcase table using kcalloc()Artem Labazov1-3/+3
The table for Unicode upcase conversion requires an order-5 allocation, which may fail on a highly-fragmented system: pool-udisksd: page allocation failure: order:5, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null), cpuset=/,mems_allowed=0 CPU: 4 PID: 3756880 Comm: pool-udisksd Tainted: G U 5.8.10-200.fc32.x86_64 #1 Hardware name: Dell Inc. XPS 13 9360/0PVG6D, BIOS 2.13.0 11/14/2019 Call Trace: dump_stack+0x6b/0x88 warn_alloc.cold+0x75/0xd9 ? _cond_resched+0x16/0x40 ? __alloc_pages_direct_compact+0x144/0x150 __alloc_pages_slowpath.constprop.0+0xcfa/0xd30 ? __schedule+0x28a/0x840 ? __wait_on_bit_lock+0x92/0xa0 __alloc_pages_nodemask+0x2df/0x320 kmalloc_order+0x1b/0x80 kmalloc_order_trace+0x1d/0xa0 exfat_create_upcase_table+0x115/0x390 [exfat] exfat_fill_super+0x3ef/0x7f0 [exfat] ? sget_fc+0x1d0/0x240 ? exfat_init_fs_context+0x120/0x120 [exfat] get_tree_bdev+0x15c/0x250 vfs_get_tree+0x25/0xb0 do_mount+0x7c3/0xaf0 ? copy_mount_options+0xab/0x180 __x64_sys_mount+0x8e/0xd0 do_syscall_64+0x4d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Make the driver use kvcalloc() to eliminate the issue. Fixes: 370e812b3ec1 ("exfat: add nls operations") Cc: [email protected] #v5.7+ Signed-off-by: Artem Labazov <[email protected]> Signed-off-by: Namjae Jeon <[email protected]>
2020-12-21fix hostfs_open() use of ->f_path.dentryAl Viro1-1/+1
this is one of the cases where we need to use d_real() - we are using more than the name of dentry here. ->d_sb is used as well, so in case of hostfs being used as a layer we get the wrong superblock. Reported-by: Johannes Berg <[email protected]> Tested-by: Johannes Berg <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-12-21io_uring: fix ignoring xa_store errorsPavel Begunkov1-3/+7
xa_store() may fail, check the result. Cc: [email protected] # 5.10 Fixes: 0f2122045b946 ("io_uring: don't rely on weak ->files references") Signed-off-by: Pavel Begunkov <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-12-21dm ebs: avoid double unlikely() notation when using IS_ERR()Antonio Quartulli1-1/+1
The definition of IS_ERR() already applies the unlikely() notation when checking the error status of the passed pointer. For this reason there is no need to have the same notation outside of IS_ERR() itself. Clean up code by removing redundant notation. Signed-off-by: Antonio Quartulli <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
2020-12-21dm verity: skip verity work if I/O error when system is shutting downHyeongseok Kim1-1/+11
If emergency system shutdown is called, like by thermal shutdown, a dm device could be alive when the block device couldn't process I/O requests anymore. In this state, the handling of I/O errors by new dm I/O requests or by those already in-flight can lead to a verity corruption state, which is a misjudgment. So, skip verity work in response to I/O error when system is shutting down. Signed-off-by: Hyeongseok Kim <[email protected]> Reviewed-by: Sami Tolvanen <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
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