1. 07 May, 2020 4 commits
  2. 06 May, 2020 4 commits
  3. 04 May, 2020 6 commits
  4. 01 May, 2020 1 commit
    • Marc Zyngier's avatar
      KVM: arm64: Fix 32bit PC wrap-around · 0225fd5e
      Marc Zyngier authored
      In the unlikely event that a 32bit vcpu traps into the hypervisor
      on an instruction that is located right at the end of the 32bit
      range, the emulation of that instruction is going to increment
      PC past the 32bit range. This isn't great, as userspace can then
      observe this value and get a bit confused.
      
      Conversly, userspace can do things like (in the context of a 64bit
      guest that is capable of 32bit EL0) setting PSTATE to AArch64-EL0,
      set PC to a 64bit value, change PSTATE to AArch32-USR, and observe
      that PC hasn't been truncated. More confusion.
      
      Fix both by:
      - truncating PC increments for 32bit guests
      - sanitizing all 32bit regs every time a core reg is changed by
        userspace, and that PSTATE indicates a 32bit mode.
      
      Cc: stable@vger.kernel.org
      Acked-by: default avatarWill Deacon <will@kernel.org>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      0225fd5e
  5. 30 Apr, 2020 3 commits
  6. 23 Apr, 2020 5 commits
  7. 22 Apr, 2020 2 commits
  8. 21 Apr, 2020 2 commits
  9. 20 Apr, 2020 4 commits
  10. 19 Apr, 2020 9 commits
    • Linus Torvalds's avatar
      Linux 5.7-rc2 · ae83d0b4
      Linus Torvalds authored
      ae83d0b4
    • Brian Geffon's avatar
      mm: Fix MREMAP_DONTUNMAP accounting on VMA merge · dadbd85f
      Brian Geffon authored
      When remapping a mapping where a portion of a VMA is remapped
      into another portion of the VMA it can cause the VMA to become
      split. During the copy_vma operation the VMA can actually
      be remerged if it's an anonymous VMA whose pages have not yet
      been faulted. This isn't normally a problem because at the end
      of the remap the original portion is unmapped causing it to
      become split again.
      
      However, MREMAP_DONTUNMAP leaves that original portion in place which
      means that the VMA which was split and then remerged is not actually
      split at the end of the mremap. This patch fixes a bug where
      we don't detect that the VMAs got remerged and we end up
      putting back VM_ACCOUNT on the next mapping which is completely
      unreleated. When that next mapping is unmapped it results in
      incorrectly unaccounting for the memory which was never accounted,
      and eventually we will underflow on the memory comittment.
      
      There is also another issue which is similar, we're currently
      accouting for the number of pages in the new_vma but that's wrong.
      We need to account for the length of the remap operation as that's
      all that is being added. If there was a mapping already at that
      location its comittment would have been adjusted as part of
      the munmap at the start of the mremap.
      
      A really simple repro can be seen in:
      https://gist.github.com/bgaff/e101ce99da7d9a8c60acc641d07f312c
      
      Fixes: e346b381 ("mm/mremap: add MREMAP_DONTUNMAP to mremap()")
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarBrian Geffon <bgeffon@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dadbd85f
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · 86cc3398
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "Two build fixes for a couple clk drivers and a fix for the Unisoc
        serial clk where we want to keep it on for earlycon"
      
      * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: sprd: don't gate uart console clock
        clk: mmp2: fix link error without mmp2
        clk: asm9260: fix __clk_hw_register_fixed_rate_with_accuracy typo
      86cc3398
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0fe5f9ca
      Linus Torvalds authored
      Pull x86 and objtool fixes from Thomas Gleixner:
       "A set of fixes for x86 and objtool:
      
        objtool:
      
         - Ignore the double UD2 which is emitted in BUG() when
           CONFIG_UBSAN_TRAP is enabled.
      
         - Support clang non-section symbols in objtool ORC dump
      
         - Fix switch table detection in .text.unlikely
      
         - Make the BP scratch register warning more robust.
      
        x86:
      
         - Increase microcode maximum patch size for AMD to cope with new CPUs
           which have a larger patch size.
      
         - Fix a crash in the resource control filesystem when the removal of
           the default resource group is attempted.
      
         - Preserve Code and Data Prioritization enabled state accross CPU
           hotplug.
      
         - Update split lock cpu matching to use the new X86_MATCH macros.
      
         - Change the split lock enumeration as Intel finaly decided that the
           IA32_CORE_CAPABILITIES bits are not architectural contrary to what
           the SDM claims. !@#%$^!
      
         - Add Tremont CPU models to the split lock detection cpu match.
      
         - Add a missing static attribute to make sparse happy"
      
      * tag 'x86-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/split_lock: Add Tremont family CPU models
        x86/split_lock: Bits in IA32_CORE_CAPABILITIES are not architectural
        x86/resctrl: Preserve CDP enable over CPU hotplug
        x86/resctrl: Fix invalid attempt at removing the default resource group
        x86/split_lock: Update to use X86_MATCH_INTEL_FAM6_MODEL()
        x86/umip: Make umip_insns static
        x86/microcode/AMD: Increase microcode PATCH_MAX_SIZE
        objtool: Make BP scratch register warning more robust
        objtool: Fix switch table detection in .text.unlikely
        objtool: Support Clang non-section symbols in ORC generation
        objtool: Support Clang non-section symbols in ORC dump
        objtool: Fix CONFIG_UBSAN_TRAP unreachable warnings
      0fe5f9ca
    • Linus Torvalds's avatar
      Merge tag 'timers-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3e0dea57
      Linus Torvalds authored
      Pull time namespace fix from Thomas Gleixner:
       "An update for the proc interface of time namespaces: Use symbolic
        names instead of clockid numbers. The usability nuisance of numbers
        was noticed by Michael when polishing the man page"
      
      * tag 'timers-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        proc, time/namespace: Show clock symbolic names in /proc/pid/timens_offsets
      3e0dea57
    • Linus Torvalds's avatar
      Merge tag 'perf-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · b7374586
      Linus Torvalds authored
      Pull perf tooling fixes and updates from Thomas Gleixner:
      
       - Fix the header line of perf stat output for '--metric-only --per-socket'
      
       - Fix the python build with clang
      
       - The usual tools UAPI header synchronization
      
      * tag 'perf-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        tools headers: Synchronize linux/bits.h with the kernel sources
        tools headers: Adopt verbatim copy of compiletime_assert() from kernel sources
        tools headers: Update x86's syscall_64.tbl with the kernel sources
        tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
        tools headers UAPI: Update tools's copy of drm.h headers
        tools headers kvm: Sync linux/kvm.h with the kernel sources
        tools headers UAPI: Sync linux/fscrypt.h with the kernel sources
        tools include UAPI: Sync linux/vhost.h with the kernel sources
        tools arch x86: Sync asm/cpufeatures.h with the kernel sources
        tools headers UAPI: Sync linux/mman.h with the kernel
        tools headers UAPI: Sync sched.h with the kernel
        tools headers: Update linux/vdso.h and grab a copy of vdso/const.h
        perf stat: Fix no metric header if --per-socket and --metric-only set
        perf python: Check if clang supports -fno-semantic-interposition
        tools arch x86: Sync the msr-index.h copy with the kernel sources
      b7374586
    • Linus Torvalds's avatar
      Merge tag 'irq-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 80ade29e
      Linus Torvalds authored
      Pull irq fixes from Thomas Gleixner:
       "A set of fixes/updates for the interrupt subsystem:
      
         - Remove setup_irq() and remove_irq(). All users have been converted
           so remove them before new users surface.
      
         - A set of bugfixes for various interrupt chip drivers
      
         - Add a few missing static attributes to address sparse warnings"
      
      * tag 'irq-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        irqchip/irq-bcm7038-l1: Make bcm7038_l1_of_init() static
        irqchip/irq-mvebu-icu: Make legacy_bindings static
        irqchip/meson-gpio: Fix HARDIRQ-safe -> HARDIRQ-unsafe lock order
        irqchip/sifive-plic: Fix maximum priority threshold value
        irqchip/ti-sci-inta: Fix processing of masked irqs
        irqchip/mbigen: Free msi_desc on device teardown
        irqchip/gic-v4.1: Update effective affinity of virtual SGIs
        irqchip/gic-v4.1: Add support for VPENDBASER's Dirty+Valid signaling
        genirq: Remove setup_irq() and remove_irq()
      80ade29e
    • Linus Torvalds's avatar
      Merge tag 'sched-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 08dd3872
      Linus Torvalds authored
      Pull scheduler fixes from Thomas Gleixner:
       "Two fixes for the scheduler:
      
         - Work around an uninitialized variable warning where GCC can't
           figure it out.
      
         - Allow 'isolcpus=' to skip unknown subparameters so that older
           kernels work with the commandline of a newer kernel. Improve the
           error output while at it"
      
      * tag 'sched-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/vtime: Work around an unitialized variable warning
        sched/isolation: Allow "isolcpus=" to skip unknown sub-parameters
      08dd3872
    • Linus Torvalds's avatar
      Merge tag 'core-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5e7de581
      Linus Torvalds authored
      Pull RCU fix from Thomas Gleixner:
       "A single bugfix for RCU to prevent taking a lock in NMI context"
      
      * tag 'core-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        rcu: Don't acquire lock in NMI handler in rcu_nmi_enter_common()
      5e7de581