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2018-03-23tpm: fix intermittent failure with self testsJames Bottomley3-40/+31
My Nuvoton 6xx in a Dell XPS-13 has been intermittently failing to work (necessitating a reboot). The problem seems to be that the TPM gets into a state where the partial self-test doesn't return TPM_RC_SUCCESS (meaning all tests have run to completion), but instead returns TPM_RC_TESTING (meaning some tests are still running in the background). There are various theories that resending the self-test command actually causes the tests to restart and thus triggers more TPM_RC_TESTING returns until the timeout is exceeded. There are several issues here: firstly being we shouldn't slow down the boot sequence waiting for the self test to complete once the TPM backgrounds them. It will actually make available all functions that have passed and if it gets a failure return TPM_RC_FAILURE to every subsequent command. So the fix is to kick off self tests once and if they return TPM_RC_TESTING log that as a backgrounded self test and continue on. In order to prevent other tpm users from seeing any TPM_RC_TESTING returns (which it might if they send a command that needs a TPM subsystem which is still under test), we loop in tpm_transmit_cmd until either a timeout or we don't get a TPM_RC_TESTING return. Finally, there have been observations of strange returns from a partial test. One Nuvoton is occasionally returning TPM_RC_COMMAND_CODE, so treat any unexpected return from a partial self test as an indication we need to run a full self test. [[email protected]: cleaned up some klog messages and dropped tpm_transmit_check() helper function from James' original commit.] Fixes: 2482b1bba5122 ("tpm: Trigger only missing TPM 2.0 self tests") Cc: [email protected] Signed-off-by: James Bottomley <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm: add retry logicJames Bottomley2-15/+61
TPM2 can return TPM2_RC_RETRY to any command and when it does we get unexpected failures inside the kernel that surprise users (this is mostly observed in the trusted key handling code). The UEFI 2.6 spec has advice on how to handle this: The firmware SHALL not return TPM2_RC_RETRY prior to the completion of the call to ExitBootServices(). Implementer’s Note: the implementation of this function should check the return value in the TPM response and, if it is TPM2_RC_RETRY, resend the command. The implementation may abort if a sufficient number of retries has been done. So we follow that advice in our tpm_transmit() code using TPM2_DURATION_SHORT as the initial wait duration and TPM2_DURATION_LONG as the maximum wait time. This should fix all the in-kernel use cases and also means that user space TSS implementations don't have to have their own retry handling. Signed-off-by: James Bottomley <[email protected]> Cc: [email protected] Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm: self test failure should not cause suspend to failChris Chiu1-0/+4
The Acer Acer Veriton X4110G has a TPM device detected as: tpm_tis 00:0b: 1.2 TPM (device-id 0xFE, rev-id 71) After the first S3 suspend, the following error appears during resume: tpm tpm0: A TPM error(38) occurred continue selftest Any following S3 suspend attempts will now fail with this error: tpm tpm0: Error (38) sending savestate before suspend PM: Device 00:0b failed to suspend: error 38 Error 38 is TPM_ERR_INVALID_POSTINIT which means the TPM is not in the correct state. This indicates that the platform BIOS is not sending the usual TPM_Startup command during S3 resume. >From this point onwards, all TPM commands will fail. The same issue was previously reported on Foxconn 6150BK8MC and Sony Vaio TX3. The platform behaviour seems broken here, but we should not break suspend/resume because of this. When the unexpected TPM state is encountered, set a flag to skip the affected TPM_SaveState command on later suspends. Cc: [email protected] Signed-off-by: Chris Chiu <[email protected]> Signed-off-by: Daniel Drake <[email protected]> Link: http://lkml.kernel.org/r/CAB4CAwfSCvj1cudi+MWaB5g2Z67d9DwY1o475YOZD64ma23UiQ@mail.gmail.com Link: https://lkml.org/lkml/2011/3/28/192 Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=591031 Reviewed-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm2: add longer timeouts for creation commands.Tomas Winkler3-13/+26
TPM2_CC_Create(0x153) and TPM2_CC_CreatePrimary (0x131) involve generation of crypto keys which can be a computationally intensive task. The timeout is set to 3min. Rather than increasing default timeout a new constant is added, to not stall for too long on regular commands failures. Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm_crb: use __le64 annotated variable for response buffer addressTomas Winkler1-2/+3
use __le64 annotated variable for response buffer address as this is read in little endian format form the register. This suppresses sparse warning drivers/char/tpm/tpm_crb.c:558:18: warning: cast to restricted __le64 Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm: fix buffer type in tpm_transmit_cmdWinkler, Tomas2-5/+5
1. The buffer cannot be const as it is used both for send and receive. 2. Drop useless casting to u8 *, as this is already a type of 'buf' parameter, it has just masked the 'const' issue. Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm: tpm-interface: fix tpm_transmit/_cmd kdocWinkler, Tomas1-2/+4
Fix tmp_ -> tpm_ typo and add reference to 'space' parameter in kdoc for tpm_transmit and tpm_transmit_cmd functions. Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23tpm: cmd_ready command can be issued only after granting localityTomas Winkler4-48/+120
The correct sequence is to first request locality and only after that perform cmd_ready handshake, otherwise the hardware will drop the subsequent message as from the device point of view the cmd_ready handshake wasn't performed. Symmetrically locality has to be relinquished only after going idle handshake has completed, this requires that go_idle has to poll for the completion and as well locality relinquish has to poll for completion so it is not overridden in back to back commands flow. Two wrapper functions are added (request_locality relinquish_locality) to simplify the error handling. The issue is only visible on devices that support multiple localities. Fixes: 877c57d0d0ca ("tpm_crb: request and relinquish locality 0") Signed-off-by: Tomas Winkler <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Tested-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
2018-03-23Merge tag 'v4.16-rc6' into next-generalJames Morris1106-6736/+10600
Merge to Linux 4.16-rc6 at the request of Jarkko, for his TPM updates.
2018-03-19exec: Set file unwritable before LSM checkKees Cook1-3/+3
The LSM check should happen after the file has been confirmed to be unchanging. Without this, we could have a race between the Time of Check (the call to security_kernel_read_file() which could read the file and make access policy decisions) and the Time of Use (starting with kernel_read_file()'s reading of the file contents). In theory, file contents could change between the two. Signed-off-by: Kees Cook <[email protected]> Reviewed-by: Mimi Zohar <[email protected]> Signed-off-by: James Morris <[email protected]>
2018-03-18Linux 4.16-rc6Linus Torvalds1-1/+1
2018-03-18Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds10-55/+108
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86/pti updates from Thomas Gleixner: "Another set of melted spectrum updates: - Iron out the last late microcode loading issues by actually checking whether new microcode is present and preventing the CPU synchronization to run into a timeout induced hang. - Remove Skylake C2 from the microcode blacklist according to the latest Intel documentation - Fix the VM86 POPF emulation which traps if VIP is set, but VIF is not. Enhance the selftests to catch that kind of issue - Annotate indirect calls/jumps for objtool on 32bit. This is not a functional issue, but for consistency sake its the right thing to do. - Fix a jump label build warning observed on SPARC64 which uses 32bit storage for the code location which is casted to 64 bit pointer w/o extending it to 64bit first. - Add two new cpufeature bits. Not really an urgent issue, but provides them for both x86 and x86/kvm work. No impact on the current kernel" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/microcode: Fix CPU synchronization routine x86/microcode: Attempt late loading only when new microcode is present x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist jump_label: Fix sparc64 warning x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels x86/vm86/32: Fix POPF emulation selftests/x86/entry_from_vm86: Add test cases for POPF selftests/x86/entry_from_vm86: Exit with 1 if we fail x86/cpufeatures: Add Intel PCONFIG cpufeature x86/cpufeatures: Add Intel Total Memory Encryption cpufeature
2018-03-18Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Thomas Gleixner: "A single fix for vmalloc_fault() which uses p*d_huge() unconditionally whether CONFIG_HUGETLBFS is set or not. In case of CONFIG_HUGETLBFS=n this results in a crash as p*d_huge() returns 0 in that case" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Fix vmalloc_fault to use pXd_large
2018-03-18Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds2-21/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "Three fixes for irq chip drivers: - Make sure the allocations in the GIC-V3 ITS driver are large enough to accomodate the interrupt space - Fix a misplaced __iomem annotation which causes a splat of 26 sparse warnings - Remove an unused function in the IMX GPCV2 driver which causes build warnings" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/irq-imx-gpcv2: Remove unused function irqchip/gic-v3-its: Ensure nr_ites >= nr_lpis irqchip/gic-v3-its: Fix misplaced __iomem annotations
2018-03-18Merge branch 'efi-urgent-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI fix from Thomas Gleixner: "A single fix to prevent partially initialized pointers in mixed mode (64bit kernel on 32bit UEFI)" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/libstub/tpm: Initialize pointer variables to zero for mixed mode
2018-03-18Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds15-40/+117
Pull KVM fixes from Paolo Bonzini: "PPC: - fix bug leading to lost IPIs and smp_call_function_many() lockups on POWER9 ARM: - locking fix - reset fix - GICv2 multi-source SGI injection fix - GICv2-on-v3 MMIO synchronization fix - make the console less verbose. x86: - fix device passthrough on AMD SME" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: Fix device passthrough when SME is active kvm: arm/arm64: vgic-v3: Tighten synchronization for guests using v2 on v3 KVM: arm/arm64: vgic: Don't populate multiple LRs with the same vintid KVM: arm/arm64: Reduce verbosity of KVM init log KVM: arm/arm64: Reset mapped IRQs on VM reset KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN KVM: arm/arm64: vgic: Add missing irq_lock to vgic_mmio_read_pending KVM: PPC: Book3S HV: Fix trap number return from __kvmppc_vcore_entry
2018-03-17parisc: Handle case where flush_cache_range is called with no contextJohn David Anglin1-9/+32
Just when I had decided that flush_cache_range() was always called with a valid context, Helge reported two cases where the "BUG_ON(!vma->vm_mm->context);" was hit on the phantom buildd: kernel BUG at /mnt/sdb6/linux/linux-4.15.4/arch/parisc/kernel/cache.c:587! CPU: 1 PID: 3254 Comm: kworker/1:2 Tainted: G D 4.15.0-1-parisc64-smp #1 Debian 4.15.4-1+b1 Workqueue: events free_ioctx   IAOQ[0]: flush_cache_range+0x164/0x168   IAOQ[1]: flush_cache_page+0x0/0x1c8   RP(r2): unmap_page_range+0xae8/0xb88 Backtrace:   [<00000000404a6980>] unmap_page_range+0xae8/0xb88   [<00000000404a6ae0>] unmap_single_vma+0xc0/0x188   [<00000000404a6cdc>] zap_page_range_single+0x134/0x1f8   [<00000000404a702c>] unmap_mapping_range+0x1cc/0x208   [<0000000040461518>] truncate_pagecache+0x98/0x108   [<0000000040461624>] truncate_setsize+0x9c/0xb8   [<00000000405d7f30>] put_aio_ring_file+0x80/0x100   [<00000000405d803c>] aio_free_ring+0x8c/0x290   [<00000000405d82c0>] free_ioctx+0x80/0x180   [<0000000040284e6c>] process_one_work+0x21c/0x668   [<00000000402854c4>] worker_thread+0x20c/0x778   [<0000000040291d44>] kthread+0x2d4/0x2e0   [<0000000040204020>] end_fault_vector+0x20/0xc0 This indicates that we need to handle the no context case in flush_cache_range() as we do in flush_cache_mm(). In thinking about this, I realized that we don't need to flush the TLB when there is no context. So, I added context checks to the large flush cases in flush_cache_mm() and flush_cache_range(). The large flush case occurs frequently in flush_cache_mm() and the change should improve fork performance. The v2 version of this change removes the BUG_ON from flush_cache_page() by skipping the TLB flush when there is no context.  I also added code to flush the TLB in flush_cache_mm() and flush_cache_range() when we have a context that's not current.  Now all three routines handle TLB flushes in a similar manner. Signed-off-by: John David Anglin <[email protected]> Cc: [email protected] # 4.9+ Signed-off-by: Helge Deller <[email protected]>
2018-03-16Merge tag 'for-4.16-rc5-tag' of ↵Linus Torvalds4-15/+15
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux Pull btrfs fixes from David Sterba: "There's an important revert in this pull request that needs to go to stable as it causes a corruption on big endian machines. The other fix is for FIEMAP incorrectly reporting shared extents before a sync and one fix for a crash in raid56. So far we got only one report about the BE corruption, the stable kernels were out for like a week, so hopefully the scope of the damage is low" * tag 'for-4.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: Revert "btrfs: use proper endianness accessors for super_copy" btrfs: add missing initialization in btrfs_check_shared btrfs: Fix NULL pointer exception in find_bio_stripe
2018-03-16Merge tag 'microblaze-4.16-rc6' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds5-64/+8
Pull microblaze fixes from Michal Simek: - Use NO_BOOTMEM to fix boot issue - Fix opt lib endian dependencies * tag 'microblaze-4.16-rc6' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: switch to NO_BOOTMEM microblaze: remove unused alloc_maybe_bootmem microblaze: Setup dependencies for ASM optimized lib functions
2018-03-16x86/microcode: Fix CPU synchronization routineBorislav Petkov1-27/+41
Emanuel reported an issue with a hang during microcode update because my dumb idea to use one atomic synchronization variable for both rendezvous - before and after update - was simply bollocks: microcode: microcode_reload_late: late_cpus: 4 microcode: __reload_late: cpu 2 entered microcode: __reload_late: cpu 1 entered microcode: __reload_late: cpu 3 entered microcode: __reload_late: cpu 0 entered microcode: __reload_late: cpu 1 left microcode: Timeout while waiting for CPUs rendezvous, remaining: 1 CPU1 above would finish, leave and the others will still spin waiting for it to join. So do two synchronization atomics instead, which makes the code a lot more straightforward. Also, since the update is serialized and it also takes quite some time per microcode engine, increase the exit timeout by the number of CPUs on the system. That's ok because the moment all CPUs are done, that timeout will be cut short. Furthermore, panic when some of the CPUs timeout when returning from a microcode update: we can't allow a system with not all cores updated. Also, as an optimization, do not do the exit sync if microcode wasn't updated. Reported-by: Emanuel Czirai <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Emanuel Czirai <[email protected]> Tested-by: Ashok Raj <[email protected]> Tested-by: Tom Lendacky <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2018-03-16x86/microcode: Attempt late loading only when new microcode is presentBorislav Petkov4-19/+28
Return UCODE_NEW from the scanning functions to denote that new microcode was found and only then attempt the expensive synchronization dance. Reported-by: Emanuel Czirai <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Emanuel Czirai <[email protected]> Tested-by: Ashok Raj <[email protected]> Tested-by: Tom Lendacky <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2018-03-16Merge tag 'drm-fixes-for-v4.16-rc6' of ↵Linus Torvalds21-50/+169
git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "i915, amd and nouveau fixes. i915: - backlight fix for some panels - pm fix - fencing fix - some GVT fixes amdgpu: - backlight fix across suspend/resume - object destruction ordering issue fix - displayport fix nouveau: - two backlight fixes - fix for some lockups Pretty quiet week, seems like everyone was fixing backlights" * tag 'drm-fixes-for-v4.16-rc6' of git://people.freedesktop.org/~airlied/linux: drm/nouveau/bl: fix backlight regression drm/nouveau/bl: Fix oops on driver unbind drm/nouveau/mmu: ALIGN_DOWN correct variable drm/i915/gvt: fix user copy warning by whitelist workload rb_tail field drm/i915/gvt: Correct the privilege shadow batch buffer address drm/amdgpu/dce: Don't turn off DP sink when disconnected drm/amdgpu: save/restore backlight level in legacy dce code drm/radeon: fix prime teardown order drm/amdgpu: fix prime teardown order drm/i915: Kick the rps worker when changing the boost frequency drm/i915: Only prune fences after wait-for-all drm/i915: Enable VBT based BL control for DP drm/i915/gvt: keep oa config in shadow ctx drm/i915/gvt: Add runtime_pm_get/put into gvt_switch_mmio
2018-03-16Revert "btrfs: use proper endianness accessors for super_copy"David Sterba2-15/+13
This reverts commit 3c181c12c431fe33b669410d663beb9cceefcd1b. The offending patch was merged in 4.16-rc4 and was promptly applied to stable kernels 4.14.25 and 4.15.8. The patch causes a corruption in several superblock items on big-endian machines because of messed up endianity conversions. The damage is manually repairable. A filesystem cannot be mounted again after it has been unmounted once. We do a full revert and not a fixup so stable can pick that patch ASAP. Fixes: 3c181c12c431 ("btrfs: use proper endianness accessors for super_copy") Link: https://lkml.kernel.org/r/[email protected] CC: [email protected] # 4.14+ Reported-by: Christoph Biedl <[email protected]> Signed-off-by: David Sterba <[email protected]>
2018-03-16KVM: x86: Fix device passthrough when SME is activeTom Lendacky1-1/+3
When using device passthrough with SME active, the MMIO range that is mapped for the device should not be mapped encrypted. Add a check in set_spte() to insure that a page is not mapped encrypted if that page is a device MMIO page as indicated by kvm_is_mmio_pfn(). Cc: <[email protected]> # 4.14.x- Signed-off-by: Tom Lendacky <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2018-03-16microblaze: switch to NO_BOOTMEMRob Herring2-50/+7
Microblaze doesn't set CONFIG_NO_BOOTMEM and so memblock_virt_alloc() doesn't work for CONFIG_HAVE_MEMBLOCK && !CONFIG_NO_BOOTMEM. Similar change was already done by others architectures "ARM: mm: Remove bootmem code and switch to NO_BOOTMEM" (sha1: 84f452b1e8fc73ac0e31254c66e3e2260ce5263d) or "openrisc: Consolidate setup to use memblock instead of bootmem" (sha1: 266c7fad157265bb54d17db1c9545f2aaa488643) or "parisc: Drop bootmem and switch to memblock" (sha1: 4fe9e1d957e45ad8eba9885ee860a0e93d13a7c7) or "powerpc: Remove bootmem allocator" (sha1: 10239733ee8617bac3f1c1769af43a88ed979324) or "s390/mm: Convert bootmem to memblock" (sha1: 50be634507284eea38df78154d22615d21200b42) or "sparc64: Convert over to NO_BOOTMEM." (sha1: 625d693e9784f988371e69c2b41a2172c0be6c11) or "xtensa: drop sysmem and switch to memblock" (sha1: 0e46c1115f5816949220d62dd3ff04aa68e7ac6b) Issue was introduced by: "of/fdt: use memblock_virt_alloc for early alloc" (sha1: 0fa1c579349fdd90173381712ad78aa99c09d38b) Signed-off-by: Rob Herring <[email protected]> Tested-by: Alvaro Gamez Machado <[email protected]> Tested-by: Michal Simek <[email protected]> Signed-off-by: Michal Simek <[email protected]>
2018-03-16microblaze: remove unused alloc_maybe_bootmemRob Herring2-9/+0
alloc_maybe_bootmem is unused, so remove it. Signed-off-by: Rob Herring <[email protected]> Signed-off-by: Michal Simek <[email protected]>
2018-03-16microblaze: Setup dependencies for ASM optimized lib functionsMichal Simek2-5/+1
The patch: "microblaze: Setup proper dependency for optimized lib functions" (sha1: 7b6ce52be3f86520524711a6f33f3866f9339694) didn't setup all dependencies properly. Optimized lib functions in C are also present for little endian and optimized library functions in assembler are implemented only for big endian version. Reported-by: kbuild test robot <[email protected]> Signed-off-by: Michal Simek <[email protected]>
2018-03-16x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklistAlexander Sergeyev1-2/+1
In accordance with Intel's microcode revision guidance from March 6 MCU rev 0xc2 is cleared on both Skylake H/S and Skylake Xeon E3 processors that share CPUID 506E3. Signed-off-by: Alexander Sergeyev <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Jia Zhang <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Kyle Huey <[email protected]> Cc: David Woodhouse <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2018-03-16Merge tag 'drm-intel-fixes-2018-03-15' of ↵Dave Airlie4-4/+82
git://anongit.freedesktop.org/drm/drm-intel into drm-fixes Only GVT fixes: - Two warnings fix for runtime pm and usr copy (Xiong, Zhenyu) - OA context fix for vGPU profiling (Min) - privilege batch buffer reloc fix (Fred) * tag 'drm-intel-fixes-2018-03-15' of git://anongit.freedesktop.org/drm/drm-intel: drm/i915/gvt: fix user copy warning by whitelist workload rb_tail field drm/i915/gvt: Correct the privilege shadow batch buffer address drm/i915/gvt: keep oa config in shadow ctx drm/i915/gvt: Add runtime_pm_get/put into gvt_switch_mmio
2018-03-16Merge branch 'linux-4.16' of git://github.com/skeggsb/linux into drm-fixesDave Airlie2-8/+8
nouveau regression fixes. * 'linux-4.16' of git://github.com/skeggsb/linux: drm/nouveau/bl: fix backlight regression drm/nouveau/bl: Fix oops on driver unbind drm/nouveau/mmu: ALIGN_DOWN correct variable
2018-03-15Merge branch 'for-linus' of ↵Linus Torvalds4-7/+22
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: - backport-friendly part of lock_parent() race fix - a fix for an assumption in the heurisic used by path_connected() that is not true on NFS - livelock fixes for d_alloc_parallel() * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: Teach path_connected to handle nfs filesystems with multiple roots. fs: dcache: Use READ_ONCE when accessing i_dir_seq fs: dcache: Avoid livelock between d_alloc_parallel and __d_add lock_parent() needs to recheck if dentry got __dentry_kill'ed under it
2018-03-16drm/nouveau/bl: fix backlight regressionKarol Herbst1-5/+5
Fixes: 3c66c87dc9 ("drm/nouveau/disp: remove hw-specific customisation of output paths") Suggested-by: Ben Skeggs <[email protected]> Signed-off-by: Karol Herbst <[email protected]> Signed-off-by: Ben Skeggs <[email protected]>
2018-03-16drm/nouveau/bl: Fix oops on driver unbindLukas Wunner1-2/+2
Unbinding nouveau on a dual GPU MacBook Pro oopses because we iterate over the bl_connectors list in nouveau_backlight_exit() but skipped initializing it in nouveau_backlight_init(). Stacktrace for posterity: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 IP: nouveau_backlight_exit+0x2b/0x70 [nouveau] nouveau_display_destroy+0x29/0x80 [nouveau] nouveau_drm_unload+0x65/0xe0 [nouveau] drm_dev_unregister+0x3c/0xe0 [drm] drm_put_dev+0x2e/0x60 [drm] nouveau_drm_device_remove+0x47/0x70 [nouveau] pci_device_remove+0x36/0xb0 device_release_driver_internal+0x157/0x220 driver_detach+0x39/0x70 bus_remove_driver+0x51/0xd0 pci_unregister_driver+0x2a/0xa0 nouveau_drm_exit+0x15/0xfb0 [nouveau] SyS_delete_module+0x18c/0x290 system_call_fast_compare_end+0xc/0x6f Fixes: b53ac1ee12a3 ("drm/nouveau/bl: Do not register interface if Apple GMUX detected") Cc: [email protected] # v4.10+ Cc: Pierre Moreau <[email protected]> Signed-off-by: Lukas Wunner <[email protected]> Signed-off-by: Ben Skeggs <[email protected]>
2018-03-16drm/nouveau/mmu: ALIGN_DOWN correct variableMāris Nartišs1-1/+1
Commit 7110c89bb8852ff8b0f88ce05b332b3fe22bd11e ("mmu: swap out round for ALIGN") replaced two calls to round/rounddown with ALIGN/ALIGN_DOWN, but erroneously applied ALIGN_DOWN to a different variable (addr) and left intended variable (tail) not rounded/ALIGNed. As a result screen corruption, X lockups are observable. An example of kernel log of affected system with NV98 card where it was bisected: nouveau 0000:01:00.0: gr: TRAP_M2MF 00000002 [IN] nouveau 0000:01:00.0: gr: TRAP_M2MF 00320951 400007c0 00000000 04000000 nouveau 0000:01:00.0: gr: 00200000 [] ch 1 [000fbbe000 DRM] subc 4 class 5039 mthd 0100 data 00000000 nouveau 0000:01:00.0: fb: trapped read at 0040000000 on channel 1 [0fbbe000 DRM] engine 00 [PGRAPH] client 03 [DISPATCH] subclient 04 [M2M_IN] reason 00000006 [NULL_DMAOBJ] Fixes bug 105173 ("[MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15") https://bugs.freedesktop.org/show_bug.cgi?id=105173 Fixes: 7110c89bb885 ("mmu: swap out round for ALIGN ") Tested-by: Pierre Moreau <[email protected]> Reviewed-by: Pierre Moreau <[email protected]> Signed-off-by: Maris Nartiss <[email protected]> Signed-off-by: Ben Skeggs <[email protected]> Cc: [email protected] # v4.15+
2018-03-15fs: Teach path_connected to handle nfs filesystems with multiple roots.Eric W. Biederman3-2/+6
On nfsv2 and nfsv3 the nfs server can export subsets of the same filesystem and report the same filesystem identifier, so that the nfs client can know they are the same filesystem. The subsets can be from disjoint directory trees. The nfsv2 and nfsv3 filesystems provides no way to find the common root of all directory trees exported form the server with the same filesystem identifier. The practical result is that in struct super s_root for nfs s_root is not necessarily the root of the filesystem. The nfs mount code sets s_root to the root of the first subset of the nfs filesystem that the kernel mounts. This effects the dcache invalidation code in generic_shutdown_super currently called shrunk_dcache_for_umount and that code for years has gone through an additional list of dentries that might be dentry trees that need to be freed to accomodate nfs. When I wrote path_connected I did not realize nfs was so special, and it's hueristic for avoiding calling is_subdir can fail. The practical case where this fails is when there is a move of a directory from the subtree exposed by one nfs mount to the subtree exposed by another nfs mount. This move can happen either locally or remotely. With the remote case requiring that the move directory be cached before the move and that after the move someone walks the path to where the move directory now exists and in so doing causes the already cached directory to be moved in the dcache through the magic of d_splice_alias. If someone whose working directory is in the move directory or a subdirectory and now starts calling .. from the initial mount of nfs (where s_root == mnt_root), then path_connected as a heuristic will not bother with the is_subdir check. As s_root really is not the root of the nfs filesystem this heuristic is wrong, and the path may actually not be connected and path_connected can fail. The is_subdir function might be cheap enough that we can call it unconditionally. Verifying that will take some benchmarking and the result may not be the same on all kernels this fix needs to be backported to. So I am avoiding that for now. Filesystems with snapshots such as nilfs and btrfs do something similar. But as the directory tree of the snapshots are disjoint from one another and from the main directory tree rename won't move things between them and this problem will not occur. Cc: [email protected] Reported-by: Al Viro <[email protected]> Fixes: 397d425dc26d ("vfs: Test for and handle paths that are unreachable from their mnt_root") Signed-off-by: "Eric W. Biederman" <[email protected]> Signed-off-by: Al Viro <[email protected]>
2018-03-15Merge tag 'gvt-fixes-2018-03-15' of https://github.com/intel/gvt-linux into ↵Rodrigo Vivi4-4/+82
drm-intel-fixes gvt-fixes-2018-03-15 - Two warnings fix for runtime pm and usr copy (Xiong, Zhenyu) - OA context fix for vGPU profiling (Min) - privilege batch buffer reloc fix (Fred) Signed-off-by: Rodrigo Vivi <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2018-03-15sparc64: Fix regression in pmdp_invalidate().David S. Miller1-6/+13
pmdp_invalidate() was changed to update the pmd atomically (to not lose dirty/access bits) and return the original pmd value. However, in doing so, we lost a lot of the essential work that set_pmd_at() does, namely to update hugepage mapping counts and queuing up the batched TLB flush entry. Thus we were not flushing entries out of the TLB when making such PMD changes. Fix this by abstracting the accounting work of set_pmd_at() out into a separate function, and call it from pmdp_establish(). Fixes: a8e654f01cb7 ("sparc64: update pmdp_invalidate() to return old pmd value") Signed-off-by: David S. Miller <[email protected]>
2018-03-15Merge tag 'kvm-ppc-fixes-4.16-2' of ↵Paolo Bonzini1-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master Fix for PPC KVM for 4.16 - Fix bug leading to lost IPIs on POWER9 and hence to other CPUs reporting lockups in smp_call_function_many().
2018-03-15Merge tag 'kvm-arm-fixes-for-v4.16-2' of ↵Paolo Bonzini13-34/+109
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master kvm/arm fixes for 4.16, take 2 - Peace of mind locking fix in vgic_mmio_read_pending - Allow hw-mapped interrupts to be reset when the VM resets - Fix GICv2 multi-source SGI injection - Fix MMIO synchronization for GICv2 on v3 emulation - Remove excess verbosity on the console
2018-03-15Merge tag 'sound-4.16-rc6' of ↵Linus Torvalds14-69/+92
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A series of small fixes in ASoC, HD-audio and core stuff: - a UAF fix in ALSA PCM core - yet more hardening for ALSA sequencer - a regression fix for the previous HD-audio power_save option change - various ASoC codec fixes (sgtl5000, rt5651, hdmi-codec, wm_adsp) - minor ASoC platform fixes (AMD ACP, sun4i)" * tag 'sound-4.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Revert power_save option default value ALSA: pcm: Fix UAF in snd_pcm_oss_get_formats() ALSA: seq: Clear client entry before deleting else at closing ALSA: seq: Fix possible UAF in snd_seq_check_queue() ASoC: amd: 16bit resolution support for i2s sp instance ASoC: wm_adsp: For TLV controls only register TLV get/set ASoC: sun4i-i2s: Fix RX slot number of SUN8I ASoC: hdmi-codec: Fix module unloading caused kernel crash ASoC: rt5651: Fix regcache sync errors on resume ASoC: sgtl5000: Fix suspend/resume MAINTAINERS: Add myself as sgtl5000 maintainer ASoC: samsung: Add the DT binding files entry to MAINTAINERS sgtl5000: change digital_mute policy
2018-03-15Merge tag 'for-4.16/dm-fixes-3' of ↵Linus Torvalds1-22/+21
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - a stable DM multipath fix to restore ability to pass integrity data - two DM multipath fixes for a fix that was merged into 4.16-rc5 * tag 'for-4.16/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm mpath: fix passing integrity data dm mpath: eliminate need to use scsi_device_from_queue dm mpath: fix uninitialized 'pg_init_wait' waitqueue_head NULL pointer
2018-03-15drm/i915/gvt: fix user copy warning by whitelist workload rb_tail fieldZhenyu Wang1-4/+6
This is to fix warning got as: [ 6730.476938] ------------[ cut here ]------------ [ 6730.476979] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'gvt-g_vgpu_workload' (offset 120, size 4)! [ 6730.477021] WARNING: CPU: 2 PID: 441 at mm/usercopy.c:81 usercopy_warn+0x7e/0xa0 [ 6730.477042] Modules linked in: tun(E) bridge(E) stp(E) llc(E) kvmgt(E) x86_pkg_temp_thermal(E) vfio_mdev(E) intel_powerclamp(E) mdev(E) coretemp(E) vfio_iommu_type1(E) vfio(E) kvm_intel(E) kvm(E) hid_generic(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) usbhid(E) i915(E) crc32c_intel(E) hid(E) ghash_clmulni_intel(E) pcbc(E) aesni_intel(E) aes_x86_64(E) crypto_simd(E) cryptd(E) glue_helper(E) intel_cstate(E) idma64(E) evdev(E) virt_dma(E) iTCO_wdt(E) intel_uncore(E) intel_rapl_perf(E) intel_lpss_pci(E) sg(E) shpchp(E) mei_me(E) pcspkr(E) iTCO_vendor_support(E) intel_lpss(E) intel_pch_thermal(E) prime_numbers(E) mei(E) mfd_core(E) video(E) acpi_pad(E) button(E) binfmt_misc(E) ip_tables(E) x_tables(E) autofs4(E) ext4(E) crc16(E) mbcache(E) jbd2(E) fscrypto(E) sd_mod(E) e1000e(E) xhci_pci(E) sdhci_pci(E) [ 6730.477244] ptp(E) cqhci(E) xhci_hcd(E) pps_core(E) sdhci(E) mmc_core(E) i2c_i801(E) usbcore(E) thermal(E) fan(E) [ 6730.477276] CPU: 2 PID: 441 Comm: gvt workload 0 Tainted: G E 4.16.0-rc1-gvt-staging-0213+ #127 [ 6730.477303] Hardware name: /NUC6i5SYB, BIOS SYSKLi35.86A.0039.2016.0316.1747 03/16/2016 [ 6730.477326] RIP: 0010:usercopy_warn+0x7e/0xa0 [ 6730.477340] RSP: 0018:ffffba6301223d18 EFLAGS: 00010286 [ 6730.477355] RAX: 0000000000000000 RBX: ffff8f41caae9838 RCX: 0000000000000006 [ 6730.477375] RDX: 0000000000000007 RSI: 0000000000000082 RDI: ffff8f41dad166f0 [ 6730.477395] RBP: 0000000000000004 R08: 0000000000000576 R09: 0000000000000000 [ 6730.477415] R10: ffffffffb1293fb2 R11: 00000000ffffffff R12: 0000000000000001 [ 6730.477447] R13: ffff8f41caae983c R14: ffff8f41caae9838 R15: 00007f183ca2b000 [ 6730.477467] FS: 0000000000000000(0000) GS:ffff8f41dad00000(0000) knlGS:0000000000000000 [ 6730.477489] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6730.477506] CR2: 0000559462817291 CR3: 000000028b46c006 CR4: 00000000003626e0 [ 6730.477526] Call Trace: [ 6730.477537] __check_object_size+0x9c/0x1a0 [ 6730.477562] __kvm_write_guest_page+0x45/0x90 [kvm] [ 6730.477585] kvm_write_guest+0x46/0x80 [kvm] [ 6730.477599] kvmgt_rw_gpa+0x9b/0xf0 [kvmgt] [ 6730.477642] workload_thread+0xa38/0x1040 [i915] [ 6730.477659] ? do_wait_intr_irq+0xc0/0xc0 [ 6730.477673] ? finish_wait+0x80/0x80 [ 6730.477707] ? clean_workloads+0x120/0x120 [i915] [ 6730.477722] kthread+0x111/0x130 [ 6730.477733] ? _kthread_create_worker_on_cpu+0x60/0x60 [ 6730.477750] ? exit_to_usermode_loop+0x6f/0xb0 [ 6730.477766] ret_from_fork+0x35/0x40 [ 6730.477777] Code: 48 c7 c0 20 e3 25 b1 48 0f 44 c2 41 50 51 41 51 48 89 f9 49 89 f1 4d 89 d8 4c 89 d2 48 89 c6 48 c7 c7 78 e3 25 b1 e8 b2 bc e4 ff <0f> ff 48 83 c4 18 c3 48 c7 c6 09 d0 26 b1 49 89 f1 49 89 f3 eb [ 6730.477849] ---[ end trace cae869c1c323e45a ]--- By whitelist guest page write from workload struct allocated from kmem cache. Reviewed-by: Hang Yuan <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]> (cherry picked from commit 5627705406874df57fdfad3b4e0c9aedd3b007df)
2018-03-15drm/i915/gvt: Correct the privilege shadow batch buffer addressfred gao3-0/+20
Once the ring buffer is copied to ring_scan_buffer and scanned, the shadow batch buffer start address is only updated into ring_scan_buffer, not the real ring address allocated through intel_ring_begin in later copy_workload_to_ring_buffer. This patch is only to set the right shadow batch buffer address from Ring buffer, not include the shadow_wa_ctx. v2: - refine some comments. (Zhenyu) v3: - fix typo in title. (Zhenyu) v4: - remove the unnecessary comments. (Zhenyu) - add comments in bb_start_cmd_va update. (Zhenyu) Fixes: 0a53bc07f044 ("drm/i915/gvt: Separate cmd scan from request allocation") Cc: [email protected] # v4.15 Cc: Zhenyu Wang <[email protected]> Cc: Yulei Zhang <[email protected]> Signed-off-by: fred gao <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]>
2018-03-14Merge tag 'scsi-fixes' of ↵Linus Torvalds4-44/+55
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "This is four patches, consisting of one regression from the merge window (qla2xxx), one long-standing memory leak (sd_zbc), one event queue mislabelling which we want to eliminate to discourage the pattern (mpt3sas), and one behaviour change because re-reading the partition table shouldn't clear the ro flag" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: sd: Keep disk read-only when re-reading partition scsi: qla2xxx: Fix crashes in qla2x00_probe_one on probe failure scsi: sd_zbc: Fix potential memory leak scsi: mpt3sas: Do not mark fw_event workqueue as WQ_MEM_RECLAIM
2018-03-14btree: avoid variable-length allocationsJoern Engel1-4/+6
geo->keylen cannot be larger than 4. So we might as well make fixed-size allocations. Given the one remaining user, geo->keylen cannot even be larger than 1. Logfs used to have 64bit and 128bit keys, tcm_qla2xxx only has 32bit keys. But let's not break the code if we don't have to. Signed-off-by: Joern Engel <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-03-14Merge branch 'percpu_ref-rcu-audit-fixes' of ↵Linus Torvalds2-18/+36
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc Pull percpu_ref rcu fixes from Tejun Heo: "Jann Horn found that aio was depending on the internal RCU grace periods of percpu-ref and that it's broken because aio uses regular RCU while percpu_ref uses sched-RCU. Depending on percpu_ref's internal grace periods isn't a good idea because - The RCU type might not match. - percpu_ref's grace periods are used to switch to atomic mode. They aren't between the last put and the invocation of the last release. This is easy to get confused about and can lead to subtle bugs. - percpu_ref might not have grace periods at all depending on its current operation mode. This patchset audits and fixes percpu_ref users for their RCU usages" [ There's a continuation of this series that clarifies percpu_ref documentation that the internal grace periods must not be depended upon, and introduces rcu_work to simplify bouncing to a workqueue after an RCU grace period. That will go in for 4.17 - this is just the minimal set with the fixes that are tagged for -stable ] * 'percpu_ref-rcu-audit-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc: RDMAVT: Fix synchronization around percpu_ref fs/aio: Use RCU accessors for kioctx_table->table[] fs/aio: Add explicit RCU grace period when freeing kioctx
2018-03-14Revert "mm/page_alloc: fix memmap_init_zone pageblock alignment"Ard Biesheuvel1-8/+5
This reverts commit 864b75f9d6b0100bb24fdd9a20d156e7cda9b5ae. Commit 864b75f9d6b0 ("mm/page_alloc: fix memmap_init_zone pageblock alignment") modified the logic in memmap_init_zone() to initialize struct pages associated with invalid PFNs, to appease a VM_BUG_ON() in move_freepages(), which is redundant by its own admission, and dereferences struct page fields to obtain the zone without checking whether the struct pages in question are valid to begin with. Commit 864b75f9d6b0 only makes it worse, since the rounding it does may cause pfn assume the same value it had in a prior iteration of the loop, resulting in an infinite loop and a hang very early in the boot. Also, since it doesn't perform the same rounding on start_pfn itself but only on intermediate values following an invalid PFN, we may still hit the same VM_BUG_ON() as before. So instead, let's fix this at the core, and ensure that the BUG check doesn't dereference struct page fields of invalid pages. Fixes: 864b75f9d6b0 ("mm/page_alloc: fix memmap_init_zone pageblock alignment") Tested-by: Jan Glauber <[email protected]> Tested-by: Shanker Donthineni <[email protected]> Cc: Daniel Vacek <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Paul Burton <[email protected]> Cc: Pavel Tatashin <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Andrew Morton <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-03-15Merge tag 'drm-intel-fixes-2018-03-14' of ↵Dave Airlie3-13/+23
git://anongit.freedesktop.org/drm/drm-intel into drm-fixes - 1 display fix for bxt - 1 gem fix for fences - 1 gem/pm fix for rps freq * tag 'drm-intel-fixes-2018-03-14' of git://anongit.freedesktop.org/drm/drm-intel: drm/i915: Kick the rps worker when changing the boost frequency drm/i915: Only prune fences after wait-for-all drm/i915: Enable VBT based BL control for DP
2018-03-15Merge branch 'drm-fixes-4.16' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie12-25/+56
into drm-fixes A few fixes for 4.16: - Fix a backlight S/R regression on amdgpu - Fix prime teardown on radeon and amdgpu - DP fix for amdgpu * 'drm-fixes-4.16' of git://people.freedesktop.org/~agd5f/linux: drm/amdgpu/dce: Don't turn off DP sink when disconnected drm/amdgpu: save/restore backlight level in legacy dce code drm/radeon: fix prime teardown order drm/amdgpu: fix prime teardown order
2018-03-14btrfs: add missing initialization in btrfs_check_sharedEdmund Nadolski1-0/+1
This patch addresses an issue that causes fiemap to falsely report a shared extent. The test case is as follows: xfs_io -f -d -c "pwrite -b 16k 0 64k" -c "fiemap -v" /media/scratch/file5 sync xfs_io -c "fiemap -v" /media/scratch/file5 which gives the resulting output: wrote 65536/65536 bytes at offset 0 64 KiB, 4 ops; 0.0000 sec (121.359 MiB/sec and 7766.9903 ops/sec) /media/scratch/file5: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 24576..24703 128 0x2001 /media/scratch/file5: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 24576..24703 128 0x1 This is because btrfs_check_shared calls find_parent_nodes repeatedly in a loop, passing a share_check struct to report the count of shared extent. But btrfs_check_shared does not re-initialize the count value to zero for subsequent calls from the loop, resulting in a false share count value. This is a regressive behavior from 4.13. With proper re-initialization the test result is as follows: wrote 65536/65536 bytes at offset 0 64 KiB, 4 ops; 0.0000 sec (110.035 MiB/sec and 7042.2535 ops/sec) /media/scratch/file5: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 24576..24703 128 0x1 /media/scratch/file5: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 24576..24703 128 0x1 which corrects the regression. Fixes: 3ec4d3238ab ("btrfs: allow backref search checks for shared extents") Signed-off-by: Edmund Nadolski <[email protected]> [ add text from cover letter to changelog ] Signed-off-by: David Sterba <[email protected]>
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