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2020-08-04Merge tag 'uninit-macro-v5.9-rc1' of ↵Linus Torvalds3-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull uninitialized_var() macro removal from Kees Cook: "This is long overdue, and has hidden too many bugs over the years. The series has several "by hand" fixes, and then a trivial treewide replacement. - Clean up non-trivial uses of uninitialized_var() - Update documentation and checkpatch for uninitialized_var() removal - Treewide removal of uninitialized_var()" * tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: compiler: Remove uninitialized_var() macro treewide: Remove uninitialized_var() usage checkpatch: Remove awareness of uninitialized_var() macro mm/debug_vm_pgtable: Remove uninitialized_var() usage f2fs: Eliminate usage of uninitialized_var() macro media: sur40: Remove uninitialized_var() usage KVM: PPC: Book3S PR: Remove uninitialized_var() usage clk: spear: Remove uninitialized_var() usage clk: st: Remove uninitialized_var() usage spi: davinci: Remove uninitialized_var() usage ide: Remove uninitialized_var() usage rtlwifi: rtl8192cu: Remove uninitialized_var() usage b43: Remove uninitialized_var() usage drbd: Remove uninitialized_var() usage x86/mm/numa: Remove uninitialized_var() usage docs: deprecated.rst: Add uninitialized_var()
2020-08-04MIPS: Update default config file for Loongson-3Huacai Chen1-6/+83
Update Loongson-3's default config file: 1, Adjust NR_CPUS to 16; 2, Add a built-in cmdline "ieee754=relaxed"; 3, Enable MSA, CGROUPS, NAMESPACES, KVM, and XFS support; 4, Enable all possible virtio drivers to support KVM Host/Guest; 5, Enable all necessary netfilter modules to support virtual network; Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-08-04MIPS: KVM: Add kvm guest support for Loongson-3Huacai Chen7-3/+125
Loongson-3 KVM guest is based on virtio, it use liointc as its interrupt controller and use GPEX as the pci controller. Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-08-03Merge tag 'locking-core-2020-08-03' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: - LKMM updates: mostly documentation changes, but also some new litmus tests for atomic ops. - KCSAN updates: the most important change is that GCC 11 now has all fixes in place to support KCSAN, so GCC support can be enabled again. Also more annotations. - futex updates: minor cleanups and simplifications - seqlock updates: merge preparatory changes/cleanups for the 'associated locks' facilities. - lockdep updates: - simplify IRQ trace event handling - add various new debug checks - simplify header dependencies, split out <linux/lockdep_types.h>, decouple lockdep from other low level headers some more - fix NMI handling - misc cleanups and smaller fixes * tag 'locking-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits) kcsan: Improve IRQ state trace reporting lockdep: Refactor IRQ trace events fields into struct seqlock: lockdep assert non-preemptibility on seqcount_t write lockdep: Add preemption enabled/disabled assertion APIs seqlock: Implement raw_seqcount_begin() in terms of raw_read_seqcount() seqlock: Add kernel-doc for seqcount_t and seqlock_t APIs seqlock: Reorder seqcount_t and seqlock_t API definitions seqlock: seqcount_t latch: End read sections with read_seqcount_retry() seqlock: Properly format kernel-doc code samples Documentation: locking: Describe seqlock design and usage locking/qspinlock: Do not include atomic.h from qspinlock_types.h locking/atomic: Move ATOMIC_INIT into linux/types.h lockdep: Move list.h inclusion into lockdep.h locking/lockdep: Fix TRACE_IRQFLAGS vs. NMIs futex: Remove unused or redundant includes futex: Consistently use fshared as boolean futex: Remove needless goto's futex: Remove put_futex_key() rwsem: fix commas in initialisation docs: locking: Replace HTTP links with HTTPS ones ...
2020-07-31MIPS: handle Loongson-specific GSExc exceptionWANG Xuerui6-0/+60
Newer Loongson cores (Loongson-3A R2 and newer) use the implementation-dependent ExcCode 16 to signal Loongson-specific exceptions. The extended cause is put in the non-standard CP0.Diag1 register which is CP0 Register 22 Select 1, called GSCause in Loongson manuals. Inside is an exception code bitfield called GSExcCode, only codes 0 to 6 inclusive are documented (so far, in the Loongson 3A3000 User Manual, Volume 2). During experiments, it was found that some undocumented unprivileged instructions can trigger the also-undocumented GSExcCode 8 on Loongson 3A4000. Processor state is not corrupted, but we cannot continue without further knowledge, and Loongson is not providing that information as of this writing. So we send SIGILL on seeing this exception code to thwart easy local DoS attacks. Other exception codes are made fatal, partly because of insufficient knowledge, also partly because they are not as easily reproduced. None of them are encountered in the wild with upstream kernels and userspace so far. Some older cores (Loongson-3A1000 and Loongson-3B1500) have ExcCode 16 too, but the semantic is equivalent to GSExcCode 0. Because the respective manuals did not mention the CP0.Diag1 register or its read behavior, these cores are not covered in this patch, as MFC0 from non-existent CP0 registers is UNDEFINED according to the MIPS architecture spec. Reviewed-by: Huacai Chen <[email protected]> Signed-off-by: WANG Xuerui <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Jiaxun Yang <[email protected]> Cc: Tiezhu Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: add definitions for Loongson-specific CP0.Diag1 registerWANG Xuerui1-0/+8
This 32-bit CP0 register is named GSCause in Loongson manuals. It carries Loongson extended exception information. We name it Diag1 because we fear the "GSCause" name might get changed in the future. Reviewed-by: Huacai Chen <[email protected]> Signed-off-by: WANG Xuerui <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Jiaxun Yang <[email protected]> Cc: Tiezhu Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: only register FTLBPar exception handler for supported modelsWANG Xuerui4-1/+20
Previously ExcCode 16 is unconditionally treated as the FTLB parity exception (FTLBPar), but in fact its semantic is implementation- dependent. Looking at various manuals it seems the FTLBPar exception is only present on some recent MIPS Technologies cores, so only register the handler on these. Fixes: 75b5b5e0a262790f ("MIPS: Add support for FTLBs") Reviewed-by: Huacai Chen <[email protected]> Signed-off-by: WANG Xuerui <[email protected]> Cc: Paul Burton <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: ingenic: Hardcode mem size for qi,lb60 boardPaul Cercueil1-29/+8
Old Device Tree for the qi,lb60 (aka. Ben Nanonote) did not have a 'memory' node. The kernel would then read the memory controller registers to know how much RAM was available. Since every other supported board has had a 'memory' node from the beginning, we can just hardcode a RAM size of 32 MiB when running with an old Device Tree without the 'memory' node. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: DTS: ingenic/qi,lb60: Add model and memory nodePaul Cercueil1-0/+6
Add a memory node, which was missing until now, and use the retail name "Ben Nanonote" as the model, as it is way more known under that name than under the name "LB60". Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: ingenic: Use fw_passed_dtb even if CONFIG_BUILTIN_DTBPaul Cercueil1-6/+1
The fw_passed_dtb is now properly initialized even when CONFIG_BUILTIN_DTB is used, so there's no need to handle it in any particular way here. Note that the behaviour is slightly different, as the previous code used the built-in Device Tree unconditionally, while now the built-in Device Tree is only used when the bootloader did not provide one. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-31MIPS: head.S: Init fw_passed_dtb to builtin DTBPaul Cercueil1-0/+6
Init the 'fw_passed_dtb' pointer to the buit-in Device Tree blob when it has been compiled in with CONFIG_BUILTIN_DTB. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-30MIPS: DTS: Fix number of msi vectors for Loongson64GHuacai Chen1-2/+6
HT irqs vectors are 8 groups, each group has 32 irqs, Loongson64C CPUs can use only 4 groups and Loongson64G CPUs can use all 8 groups. So the number of msi vectors of Loongson64G is 192 (32*8 - 64 = 192). Fixes: 24af105962c8004edb9f5bf84 ("MIPS: Loongson64: DeviceTree for LS7A PCH") Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-29Merge branch 'locking/header'Peter Zijlstra1-1/+0
2020-07-29locking/atomic: Move ATOMIC_INIT into linux/types.hHerbert Xu1-1/+0
This patch moves ATOMIC_INIT from asm/atomic.h into linux/types.h. This allows users of atomic_t to use ATOMIC_INIT without having to include atomic.h as that way may lead to header loops. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Waiman Long <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2020-07-28MIPS: Loongson64: Add ISA node for LS7A PCHJiaxun Yang1-0/+7
Although currently we're not enabling any ISA device in devicetree, but this node is required to express the ranges of address reserved for ISA. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: Loongson64: DTS: Fix ISA and PCI I/O ranges for RS780E PCHJiaxun Yang1-2/+2
Ranges should express the actual physical address on bus. Also enlarge the PCI I/O size to the actual hardware limit. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: Loongson64: Enlarge IO_SPACE_LIMITJiaxun Yang3-4/+5
It can be very big on LS7A PCH systems. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: Loongson64: Process ISA Node in DeviceTreeJiaxun Yang1-25/+62
Previously, we're hardcoding reserved ISA I/O Space in, now we're processing it I/O via DeviceTree directly. The ranges property if ISA node is used to determine the size and address of reserved I/O space. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: ingenic: Enable JZ4780_NEMC manuallyKrzysztof Kozlowski3-0/+3
The CONFIG_JZ4780_NEMC was previously a default on MIPS but now it has to be enabled manually. Signed-off-by: Krzysztof Kozlowski <[email protected]> Reviewed-by: Paul Cercueil <[email protected]> Acked-by: Thomas Bogendoerfer <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: qi_lb60: Fix routing to audio amplifierPaul Cercueil1-1/+1
The ROUT (right channel output of audio codec) was connected to INL (left channel of audio amplifier) instead of INR (right channel of audio amplifier). Fixes: 8ddebad15e9b ("MIPS: qi_lb60: Migrate to devicetree") Cc: [email protected] # v5.3 Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: Remove legacy MIPS_MACHINE optionPaul Cercueil4-112/+0
The CONFIG_MIPS_MACHINE option is dead code that hasn't been used in years. The Kconfig option is not selected anywhere, and the <asm/mips_machine.h> is not included anywhere either. To make things worse, for years it co-existed with a separate MIPS machine implementation as <asm/machine.h>. The two defined the 'mips_machine' structure with different fields, and the 'MIPS_MACHINE' macro with different parameters. The two used the same memory area (defined by the linker script) to store data, and you could totally use the two at the same time for all kinds of funny results. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: ath79: Remove unused include <asm/mips_machine.h>Paul Cercueil1-1/+0
Since commit 3a77e0d75eed ("MIPS: ath79: drop machfiles"), this header is not used anymore. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-28MIPS: cpu-feature-overrides: Remove not needed overridesThomas Bogendoerfer4-8/+0
Clean up cpu-feature-overrides, which only repeat the default. Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-27mips: switch to ->regset_get()Al Viro1-146/+58
Signed-off-by: Al Viro <[email protected]>
2020-07-27MIPS: KVM: Fix build error caused by 'kvm_run' cleanupHuacai Chen1-1/+1
Commit c34b26b98caca48ec9ee9 ("KVM: MIPS: clean up redundant 'kvm_run' parameters") remove the 'kvm_run' parameter in kvm_mips_complete_mmio_ load(), but forget to update all callers. Fixes: c34b26b98caca48ec9ee9 ("KVM: MIPS: clean up redundant 'kvm_run' parameters") Reported-by: kernel test robot <[email protected]> Cc: Tianjia Zhang <[email protected]> Signed-off-by: Huacai Chen <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2020-07-26MIPS: Fix unable to reserve memory for Crash kernelJinyang He1-1/+1
Use 0 as the align parameter in memblock_find_in_range() is incorrect when we reserve memory for Crash kernel. The environment as follows: [ 0.000000] MIPS: machine is loongson,loongson64c-4core-rs780e ... [ 1.951016] crashkernel=64M@128M The warning as follows: [ 0.000000] Invalid memory region reserved for crash kernel And the iomem as follows: 00200000-0effffff : System RAM 04000000-0484009f : Kernel code 048400a0-04ad7fff : Kernel data 04b40000-05c4c6bf : Kernel bss 1a000000-1bffffff : pci@1a000000 ... The align parameter may be finally used by round_down() or round_up(). Like the following call tree: mips-next: mm/memblock.c memblock_find_in_range └── memblock_find_in_range_node ├── __memblock_find_range_bottom_up │ └── round_up └── __memblock_find_range_top_down └── round_down \#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) \#define round_down(x, y) ((x) & ~__round_mask(x, y)) \#define __round_mask(x, y) ((__typeof__(x))((y)-1)) The round_down(or round_up)'s second parameter must be a power of 2. If the second parameter is 0, it both will return 0. Use 1 as the parameter to fix the bug and the iomem as follows: 00200000-0effffff : System RAM 04000000-0484009f : Kernel code 048400a0-04ad7fff : Kernel data 04b40000-05c4c6bf : Kernel bss 08000000-0bffffff : Crash kernel 1a000000-1bffffff : pci@1a000000 ... Signed-off-by: Jinyang He <[email protected]> Reviewed-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26MIPS: CPU#0 is not hotpluggableHuacai Chen1-1/+1
Now CPU#0 is not hotpluggable on MIPS, so prevent to create /sys/devices /system/cpu/cpu0/online which confuses some user-space tools. Cc: [email protected] Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26MIPS: ingenic: JZ4725B: Add IPU nodePaul Cercueil2-1/+35
Add a devicetree node for the Image Processing Unit (IPU) found in the JZ4725B. Connect it with graph nodes to the LCD node. The LCD driver will expect the IPU node to be accessed through graph port #8, as stated in the bindings documentation. Signed-off-by: Paul Cercueil <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: octeon: octeon.h: delete duplicated wordRandy Dunlap1-1/+1
Delete the repeated word "as". Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: octeon: cvmx-pow.h: fix duplicated wordsRandy Dunlap1-4/+4
Delete the repeated words "Returns" and convert to kernel-doc notation by adding a ':'. Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: octeon: cvmx-pkoh: fix duplicated wordsRandy Dunlap1-4/+3
Delete the repeated word "command". Delete the repeated words "returns" and convert to kernel-doc notation by adding a ':'. Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: octeon: cvmx-pip.h: delete duplicated wordRandy Dunlap1-1/+1
Delete the repeated word "the". Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: octeon: cvmx-l2c.h: delete duplicated wordRandy Dunlap1-1/+1
Delete the repeated word "Returns". Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-26mips: io.h: delete duplicated wordRandy Dunlap1-1/+1
Delete the repeated word "on". Signed-off-by: Randy Dunlap <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-2/+3
The UDP reuseport conflict was a little bit tricky. The net-next code, via bpf-next, extracted the reuseport handling into a helper so that the BPF sk lookup code could invoke it. At the same time, the logic for reuseport handling of unconnected sockets changed via commit efc6b6f6c3113e8b203b9debfb72d81e0f3dcace which changed the logic to carry on the reuseport result into the rest of the lookup loop if we do not return immediately. This requires moving the reuseport_has_conns() logic into the callers. While we are here, get rid of inline directives as they do not belong in foo.c files. The other changes were cases of more straightforward overlapping modifications. Signed-off-by: David S. Miller <[email protected]>
2020-07-24mips: traps, add __init to parity_protection_initJiri Slaby1-1/+1
It references __initdata and is called only from an __init function: trap_init. This avoids section mismatches (which I am seeing with gcc 10). Signed-off-by: Jiri Slaby <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: [email protected] Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-24MIPS: BCM63xx: improve CFE version detectionÁlvaro Fernández Rojas1-4/+18
There are some CFE variants that start with 'cfe-vd' instead of 'cfe-v', such as the one used in the Huawei HG556a: "cfe-vd081.5003". In this case, the CFE version is stored as is (string vs number bytes). Some newer devices have an additional version number, such as the Comtrend VR-3032u: "1.0.38-112.118-11". Finally, print the string as is if the version doesn't start with "cfe-v" or "cfe-vd", but starts with "cfe-". Signed-off-by: Álvaro Fernández Rojas <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-24MIPS: X2000: Add X2000 system type.周琰杰 (Zhou Yanjie)4-2/+20
1.Add "PRID_COMP_INGENIC_13" and "PRID_IMP_XBURST2" for X2000. 2.Add X2000 system type for cat /proc/cpuinfo to give out X2000. Signed-off-by: 周琰杰 (Zhou Yanjie) <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-24MIPS: OCTEON: add missing put_device() call in dwc3_octeon_device_init()Yu Kuai1-1/+4
if of_find_device_by_node() succeed, dwc3_octeon_device_init() doesn't have a corresponding put_device(). Thus add put_device() to fix the exception handling for this function implementation. Fixes: 93e502b3c2d4 ("MIPS: OCTEON: Platform support for OCTEON III USB controller") Signed-off-by: Yu Kuai <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-24MIPS: Retire kvm paravirtJiaxun Yang16-1017/+3
paravirt machine was introduced for Cavium's partial virtualization technology, however, it's host side support and QEMU support never landed in upstream. As Cavium was acquired by Marvel and they have no intention to maintain their MIPS product line, also paravirt is unlikely to be utilized by community users, it's time to retire it if nobody steps in to maintain it. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-23irqdomain/treewide: Free firmware node after domain removalJon Derrick1-0/+3
Commit 711419e504eb ("irqdomain: Add the missing assignment of domain->fwnode for named fwnode") unintentionally caused a dangling pointer page fault issue on firmware nodes that were freed after IRQ domain allocation. Commit e3beca48a45b fixed that dangling pointer issue by only freeing the firmware node after an IRQ domain allocation failure. That fix no longer frees the firmware node immediately, but leaves the firmware node allocated after the domain is removed. The firmware node must be kept around through irq_domain_remove, but should be freed it afterwards. Add the missing free operations after domain removal where where appropriate. Fixes: e3beca48a45b ("irqdomain/treewide: Keep firmware node unconditionally allocated") Signed-off-by: Jon Derrick <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Acked-by: Bjorn Helgaas <[email protected]> # drivers/pci Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected]
2020-07-20Merge 5.8-rc6 into usb-nextGreg Kroah-Hartman6-15/+21
We need the USB fixes in here as well. Signed-off-by: Greg Kroah-Hartman <[email protected]>
2020-07-19net: remove compat_sys_{get,set}sockoptChristoph Hellwig2-4/+4
Now that the ->compat_{get,set}sockopt proto_ops methods are gone there is no good reason left to keep the compat syscalls separate. This fixes the odd use of unsigned int for the compat_setsockopt optlen and the missing sock_use_custom_sol_socket. It would also easily allow running the eBPF hooks for the compat syscalls, but such a large change in behavior does not belong into a consolidation patch like this one. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2020-07-19Merge tag 'irq-urgent-2020-07-19' of ↵Linus Torvalds1-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into master Pull irq fixes from Thomas Gleixner: "Two fixes for the interrupt subsystem: - Make the handling of the firmware node consistent and do not free the node after the domain has been created successfully. The core code stores a pointer to it which can lead to a use after free or double free. This used to "work" because the pointer was not stored when the initial code was written, but at some point later it was required to store it. Of course nobody noticed that the existing users break that way. - Handle affinity setting on inactive interrupts correctly when hierarchical irq domains are enabled. When interrupts are inactive with the modern hierarchical irqdomain design, the interrupt chips are not necessarily in a state where affinity changes can be handled. The legacy irq chip design allowed this because interrupts are immediately fully initialized at allocation time. X86 has a hacky workaround for this, but other implementations do not. This cased malfunction on GIC-V3. Instead of playing whack a mole to find all affected drivers, change the core code to store the requested affinity setting and then establish it when the interrupt is allocated, which makes the X86 hack go away" * tag 'irq-urgent-2020-07-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/affinity: Handle affinity setting on inactive interrupts correctly irqdomain/treewide: Keep firmware node unconditionally allocated
2020-07-19dma-mapping: make support for dma ops optionalChristoph Hellwig1-0/+1
Avoid the overhead of the dma ops support for tiny builds that only use the direct mapping. Signed-off-by: Christoph Hellwig <[email protected]> Tested-by: Alexey Kardashevskiy <[email protected]> Reviewed-by: Alexey Kardashevskiy <[email protected]>
2020-07-16treewide: Remove uninitialized_var() usageKees Cook3-5/+5
Using uninitialized_var() is dangerous as it papers over real bugs[1] (or can in the future), and suppresses unrelated compiler warnings (e.g. "unused variable"). If the compiler thinks it is uninitialized, either simply initialize the variable or make compiler changes. In preparation for removing[2] the[3] macro[4], remove all remaining needless uses with the following script: git grep '\buninitialized_var\b' | cut -d: -f1 | sort -u | \ xargs perl -pi -e \ 's/\buninitialized_var\(([^\)]+)\)/\1/g; s:\s*/\* (GCC be quiet|to make compiler happy) \*/$::g;' drivers/video/fbdev/riva/riva_hw.c was manually tweaked to avoid pathological white-space. No outstanding warnings were found building allmodconfig with GCC 9.3.0 for x86_64, i386, arm64, arm, powerpc, powerpc64le, s390x, mips, sparc64, alpha, and m68k. [1] https://lore.kernel.org/lkml/[email protected]/ [2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/ [3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/ [4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/ Reviewed-by: Leon Romanovsky <[email protected]> # drivers/infiniband and mlx4/mlx5 Acked-by: Jason Gunthorpe <[email protected]> # IB Acked-by: Kalle Valo <[email protected]> # wireless drivers Reviewed-by: Chao Yu <[email protected]> # erofs Signed-off-by: Kees Cook <[email protected]>
2020-07-16MIPS: Prevent READ_IMPLIES_EXEC propagationTiezhu Yang1-0/+1
In the MIPS architecture, we should clear the security-relevant flag READ_IMPLIES_EXEC in the function SET_PERSONALITY2() of the file arch/mips/include/asm/elf.h. Otherwise, with this flag set, PROT_READ implies PROT_EXEC for mmap to make memory executable that is not safe, because this condition allows an attacker to simply jump to and execute bytes that are considered to be just data [1]. In mm/mmap.c: unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate, struct list_head *uf) { [...] if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC)) if (!(file && path_noexec(&file->f_path))) prot |= PROT_EXEC; [...] } By the way, x86 and ARM64 have done the similar thing. After commit 250c22777fe1 ("x86_64: move kernel"), in the file arch/x86/kernel/process_64.c: void set_personality_64bit(void) { [...] current->personality &= ~READ_IMPLIES_EXEC; } After commit 48f99c8ec0b2 ("arm64: Preventing READ_IMPLIES_EXEC propagation"), in the file arch/arm64/include/asm/elf.h: #define SET_PERSONALITY(ex) \ ({ \ clear_thread_flag(TIF_32BIT); \ current->personality &= ~READ_IMPLIES_EXEC; \ }) [1] https://insights.sei.cmu.edu/cert/2014/02/feeling-insecure-blame-your-parent.html Reported-by: Juxin Gao <[email protected]> Co-developed-by: Juxin Gao <[email protected]> Signed-off-by: Juxin Gao <[email protected]> Signed-off-by: Tiezhu Yang <[email protected]> Reviewed-by: Kees Cook <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-16mips/vdso: Fix resource leaks in genvdso.cPeng Fan1-0/+10
Close "fd" before the return of map_vdso() and close "out_file" in main(). Signed-off-by: Peng Fan <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-16MIPS: CU1000-Neo: Refresh defconfig to support LED.周琰杰 (Zhou Yanjie)1-0/+4
Refresh CU1000-Neo's defconfig to support LED. Tested-by: 周正 (Zhou Zheng) <[email protected]> Signed-off-by: 周琰杰 (Zhou Yanjie) <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2020-07-16MIPS: Ingenic: Fix bugs and add missing LED node for X1000.周琰杰 (Zhou Yanjie)2-122/+118
1.The CU1000-Neo board actually uses X1000E instead of X1000, so the wrongly written "ingenic,x1000" in compatible should be changed to "ingenic,x1000e". 2.Adjust the order of nodes according to the corresponding address value. 3.Drop unnecessary node in "wlan_pwrseq". 4.Add the leds node to "cu1000-neo.dts". Tested-by: 周正 (Zhou Zheng) <[email protected]> Signed-off-by: 周琰杰 (Zhou Yanjie) <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
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