1. 07 Jul, 2015 5 commits
    • Andy Lutomirski's avatar
      notifiers, RCU: Assert that RCU is watching in notify_die() · e727c7d7
      Andy Lutomirski authored
      Low-level arch entries often call notify_die(), and it's easy for
      arch code to fail to exit an RCU quiescent state first.  Assert
      that we're not quiescent in notify_die().
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Denys Vlasenko <vda.linux@googlemail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: paulmck@linux.vnet.ibm.com
      Link: http://lkml.kernel.org/r/1f5fe6c23d5b432a23267102f2d72b787d80fdd8.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      e727c7d7
    • Andy Lutomirski's avatar
      context_tracking: Add ct_state() and CT_WARN_ON() · f9281648
      Andy Lutomirski authored
      This will let us sprinkle sanity checks around the kernel
      without making too much of a mess.
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Denys Vlasenko <vda.linux@googlemail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: paulmck@linux.vnet.ibm.com
      Link: http://lkml.kernel.org/r/5da41fb2ceb29eac671f427c67040401ba2a1fa0.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      f9281648
    • Ingo Molnar's avatar
      um: Fix do_signal() prototype · ccaee5f8
      Ingo Molnar authored
      Once x86 exports its do_signal(), the prototypes will clash.
      
      Fix the clash and also improve the code a bit: remove the
      unnecessary kern_do_signal() indirection. This allows
      interrupt_end() to share the 'regs' parameter calculation.
      
      Also remove the unused return code to match x86.
      
      Minimally build and boot tested.
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Denys Vlasenko <vda.linux@googlemail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Richard Weinberger <richard.weinberger@gmail.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: paulmck@linux.vnet.ibm.com
      Link: http://lkml.kernel.org/r/67c57eac09a589bac3c6c5ff22f9623ec55a184a.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      ccaee5f8
    • Andy Lutomirski's avatar
      x86/entry/64/compat: Fix bad fast syscall arg failure path · 5e99cb7c
      Andy Lutomirski authored
      If user code does SYSCALL32 or SYSENTER without a valid stack,
      then our attempt to determine the syscall args will result in a
      failed uaccess fault.  Previously, we would try to recover by
      jumping to the syscall exit code, but we'd run the syscall exit
      work even though we never made it to the syscall entry work.
      
      Clean it up by treating the failure path as a non-syscall entry
      and exit pair.
      
      This fixes strace's output when running the syscall_arg_fault
      test. Without this fix, strace would get out of sync and would
      fail to associate syscall entries with syscall exits.
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Denys Vlasenko <vda.linux@googlemail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: paulmck@linux.vnet.ibm.com
      Link: http://lkml.kernel.org/r/903010762c07a3d67df914fea2da84b52b0f8f1d.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      5e99cb7c
    • Andy Lutomirski's avatar
      x86/entry, selftests/x86: Add a test for 32-bit fast syscall arg faults · 5e5c684a
      Andy Lutomirski authored
      This test passes on 4.0 and fails on some newer kernels.
      Fortunately, the failure is likely not a big deal.
      
      This test will make sure that we don't break it further (e.g. OOPSing)
      as we clean up the entry code and that we eventually fix the
      regression.
      
      There's arguably no need to preserve the old ABI here --
      anything that makes it into a fast (vDSO) syscall with a bad
      stack is about to crash no matter what we do.
      Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Denys Vlasenko <vda.linux@googlemail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: paulmck@linux.vnet.ibm.com
      Link: http://lkml.kernel.org/r/9cfcc51005168cb1b06b31991931214d770fc59a.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      5e5c684a
  2. 06 Jul, 2015 32 commits
  3. 05 Jul, 2015 3 commits
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 1c4c7159
      Linus Torvalds authored
      Pull ext4 bugfixes from Ted Ts'o:
       "Bug fixes (all for stable kernels) for ext4:
      
         - address corner cases for indirect blocks->extent migration
      
         - fix reserved block accounting invalidate_page when
           page_size != block_size (i.e., ppc or 1k block size file systems)
      
         - fix deadlocks when a memcg is under heavy memory pressure
      
         - fix fencepost error in lazytime optimization"
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: replace open coded nofail allocation in ext4_free_blocks()
        ext4: correctly migrate a file with a hole at the beginning
        ext4: be more strict when migrating to non-extent based file
        ext4: fix reservation release on invalidatepage for delalloc fs
        ext4: avoid deadlocks in the writeback path by using sb_getblk_gfp
        bufferhead: Add _gfp version for sb_getblk()
        ext4: fix fencepost error in lazytime optimization
      1c4c7159
    • Linus Torvalds's avatar
      Linux 4.2-rc1 · d770e558
      Linus Torvalds authored
      d770e558
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v4.2-2' of... · a585d2b7
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v4.2-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
      
      Pull late x86 platform driver updates from Darren Hart:
       "The following came in a bit later and I wanted them to bake in next a
        few more days before submitting, thus the second pull.
      
        A new intel_pmc_ipc driver, a symmetrical allocation and free fix in
        dell-laptop, a couple minor fixes, and some updated documentation in
        the dell-laptop comments.
      
        intel_pmc_ipc:
         - Add Intel Apollo Lake PMC IPC driver
      
        tc1100-wmi:
         - Delete an unnecessary check before the function call "kfree"
      
        dell-laptop:
         - Fix allocating & freeing SMI buffer page
         - Show info about WiGig and UWB in debugfs
         - Update information about wireless control"
      
      * tag 'platform-drivers-x86-v4.2-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
        intel_pmc_ipc: Add Intel Apollo Lake PMC IPC driver
        tc1100-wmi: Delete an unnecessary check before the function call "kfree"
        dell-laptop: Fix allocating & freeing SMI buffer page
        dell-laptop: Show info about WiGig and UWB in debugfs
        dell-laptop: Update information about wireless control
      a585d2b7