1. 07 Dec, 2012 6 commits
  2. 06 Dec, 2012 10 commits
  3. 05 Dec, 2012 5 commits
  4. 04 Dec, 2012 14 commits
    • David Howells's avatar
      ASN.1: Fix an indefinite length skip error · f3537f91
      David Howells authored
      
      
      Fix an error in asn1_find_indefinite_length() whereby small definite length
      elements of size 0x7f are incorrecly classified as non-small.  Without this
      fix, an error will be given as the length of the length will be perceived as
      being very much greater than the maximum supported size.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      f3537f91
    • David Howells's avatar
      MODSIGN: Don't use enum-type bitfields in module signature info block · 12e130b0
      David Howells authored
      
      
      Don't use enum-type bitfields in the module signature info block as we can't be
      certain how the compiler will handle them.  As I understand it, it is arch
      dependent, and it is possible for the compiler to rearrange them based on
      endianness and to insert a byte of padding to pad the three enums out to four
      bytes.
      
      Instead use u8 fields for these, which the compiler should emit in the right
      order without padding.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      12e130b0
    • Thomas Gleixner's avatar
      watchdog: Fix CPU hotplug regression · 8d451690
      Thomas Gleixner authored
      Norbert reported:
      "3.7-rc6 booted with nmi_watchdog=0 fails to suspend to RAM or
       offline CPUs. It's reproducable with a KVM guest and physical
       system."
      
      The reason is that commit bcd951cf
      
      (watchdog: Use hotplug thread
      infrastructure) missed to take this into account. So the cpu offline
      code gets stuck in the teardown function because it accesses non
      initialized data structures.
      
      Add a check for watchdog_enabled into that path to cure the issue.
      Reported-and-tested-by: default avatarNorbert Warmuth <nwarmuth@t-online.de>
      Tested-by: default avatarJoseph Salisbury <joseph.salisbury@canonical.com>
      Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1211231033230.2701@ionos
      Link: http://bugs.launchpad.net/bugs/1079534
      
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      8d451690
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · df2fc246
      Linus Torvalds authored
      Pull module fixes from Rusty Russell:
       "Module signing build fixes for blackfin and metag"
      
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
        modsign: add symbol prefix to certificate list
        linux/kernel.h: define SYMBOL_PREFIX
      df2fc246
    • Linus Torvalds's avatar
      Merge tag 'upstream-3.7-rc9' of git://git.infradead.org/linux-ubi · 70dcc535
      Linus Torvalds authored
      Pull UBI changes from Artem Bityutskiy:
       "Fixes for 2 brown-paperbag bugs introduced this merge window by the
        fastmap code:
      
         1.  The UBI background thread got stuck when a bit-flip happened
             because free LEBs was not removed from the "free" tree when we
             started using it.
         2.  I/O debugging checks did not work because we called a sleeping
             function in atomic context."
      
      * tag 'upstream-3.7-rc9' of git://git.infradead.org/linux-ubi:
        UBI: dont call ubi_self_check_all_ff() in __wl_get_peb()
        UBI: remove PEB from free tree in get_peb_for_wl()
      70dcc535
    • Linus Torvalds's avatar
      Merge branch 'for-3.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · ca50496e
      Linus Torvalds authored
      Pull workqueue fixes from Tejun Heo:
       "So, safe fixes my ass.
      
        Commit 8852aac2 ("workqueue: mod_delayed_work_on() shouldn't queue
        timer on 0 delay") had the side-effect of performing delayed_work
        sanity checks even when @delay is 0, which should be fine for any sane
        use cases.
      
        Unfortunately, megaraid was being overly ingenious.  It seemingly
        wanted to use cancel_delayed_work_sync() before cancel_work_sync() was
        introduced, but didn't want to waste the space for full delayed_work
        as it was only going to use 0 @delay.  So, it only allocated space for
        struct work_struct and then cast it to struct delayed_work and passed
        it into delayed_work functions - truly awesome engineering tradeoff to
        save some bytes.
      
        Xiaotian fixed it by making megraid allocate full delayed_work for
        now.  It should be converted to use work_struct and cancel_work_sync()
        but I think we better do that after 3.7.
      
        I added another commit to change BUG_ON()s in __queue_delayed_work()
        to WARN_ON_ONCE()s so that the kernel doesn't crash even if there are
        more such abuses."
      
      * 'for-3.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: convert BUG_ON()s in __queue_delayed_work() to WARN_ON_ONCE()s
        megaraid: fix BUG_ON() from incorrect use of delayed work
      ca50496e
    • Ralf Baechle's avatar
      MIPS: N32: Fix preadv(2) and pwritev(2) entry points. · d5563715
      Ralf Baechle authored
      By using the native syscall entry point the kernel was also expecting
      64-bit iovec structures.
      
      This is broken since ddd9e91b
      
       [preadv/
      pwritev: MIPS: Add preadv(2) and pwritev(2) syscalls.] which originally
      added these two syscalls.  I walked through piles of code, including
      libc and couldn't find anything that would have worked around the issue
      so this change the API to what it should always have been.
      
      Noticed and patch suggested by Al Viro.
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      d5563715
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 609e3ff3
      Linus Torvalds authored
      Pull sparc fixes from David Miller:
       "Two small fixes for Sparc, nobody uses sparc, so these are low risk :-)
      
         1) Piggyback is too picky about the symbol types that _start and _end
            have in the final kernel image, and it thus breaks with newer
            binutils.  Future proof by getting rid of the symbol type checks.
      
         2) exit_group() should kill register windows on sparc64 the same way
            we do for plain exit().  Thanks to Al Viro for spotting this."
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc: Fix piggyback with newer binutils.
        sparc64: exit_group should kill register windows just like plain exit.
      609e3ff3
    • Linus Torvalds's avatar
      vfs: avoid "attempt to access beyond end of device" warnings · 57302e0d
      Linus Torvalds authored
      The block device access simplification that avoided accessing the (racy)
      block size information (commit bbec0270
      
      : "blkdev_max_block: make
      private to fs/buffer.c") no longer checks the maximum block size in the
      block mapping path.
      
      That was _almost_ as simple as just removing the code entirely, because
      the readers and writers all check the size of the device anyway, so
      under normal circumstances it "just worked".
      
      However, the block size may be such that the end of the device may
      straddle one single buffer_head.  At which point we may still want to
      access the end of the device, but the buffer we use to access it
      partially extends past the end.
      
      The 'bd_set_size()' function intentionally sets the block size to avoid
      this, but mounting the device - or setting the block size by hand to
      some other value - can modify that block size.
      
      So instead, teach 'submit_bh()' about the special case of the buffer
      head straddling the end of the device, and turning such an access into a
      smaller IO access, avoiding the problem.
      
      This, btw, also means that unlike before, we can now access the whole
      device regardless of device block size setting.  So now, even if the
      device size is only 512-byte aligned, we can read and write even the
      last sector even when having a much bigger block size for accessing the
      rest of the device.
      
      So with this, we could now get rid of the 'bd_set_size()' block size
      code entirely - resulting in faster IO for the common case - but that
      would be a separate patch.
      Reported-and-tested-by: default avatarRomain Francoise <romain@orebokech.com>
      Reporeted-and-tested-by: default avatarMeelis Roos <mroos@linux.ee>
      Reported-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      57302e0d
    • Tejun Heo's avatar
      workqueue: convert BUG_ON()s in __queue_delayed_work() to WARN_ON_ONCE()s · fc4b514f
      Tejun Heo authored
      8852aac2 ("workqueue: mod_delayed_work_on() shouldn't queue timer on
      0 delay") unexpectedly uncovered a very nasty abuse of delayed_work in
      megaraid - it allocated work_struct, casted it to delayed_work and
      then pass that into queue_delayed_work().
      
      Previously, this was okay because 0 @delay short-circuited to
      queue_work() before doing anything with delayed_work.  8852aac2
      moved 0 @delay test into __queue_delayed_work() after sanity check on
      delayed_work making megaraid trigger BUG_ON().
      
      Although megaraid is already fixed by c1d390d8
      
       ("megaraid: fix
      BUG_ON() from incorrect use of delayed work"), this patch converts
      BUG_ON()s in __queue_delayed_work() to WARN_ON_ONCE()s so that such
      abusers, if there are more, trigger warning but don't crash the
      machine.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Xiaotian Feng <xtfeng@gmail.com>
      fc4b514f
    • David Daney's avatar
      MIPS: Avoid mcheck by flushing page range in huge_ptep_set_access_flags() · ac53c4fc
      David Daney authored
      
      
      Problem:
      
      1) Huge page mapping of anonymous memory is initially invalid.  Will be
         faulted in by copy-on-write mechanism.
      
      2) Userspace attempts store at the end of the huge mapping.
      
      3) TLB Refill exception handler fill TLB with a normal (4K sized)
         invalid page at the end of the huge mapping virtual address range.
      
      4) Userspace restarted, and re-attempts the store at the end of the
         huge mapping.
      
      5) Page from #3 is invalid, we get a fault and go to the hugepage
         fault handler.  This tries to map a huge page and calls
         huge_ptep_set_access_flags() to install the mapping.
      
      6) We just call the generic ptep_set_access_flags() to set up the page
         tables, but the flush there assumes a normal (4K sized) page and
         only tries to flush the first part of the huge page virtual address
         out of the TLB, since the existing entry from step #3 doesn't
         conflict, nothing is flushed.
      
      7) We attempt to load the mapping into the TLB, but because it
         conflicts with the entry from step #3, we get a Machine Check
         exception.
      
      The fix: Flush the entire rage covered by the huge page in
      huge_ptep_set_access_flags(), and remove the optimization in
      local_flush_tlb_range() so that the flush actually does the correct
      thing.
      Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Cc: Hillf Danton <dhillf@gmail.com>
      Patchwork: https://patchwork.linux-mips.org/patch/4661/
      
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      (cherry picked from commit dd617f258cc39d36be26afee9912624a2d23112c)
      ac53c4fc
    • Xiaotian Feng's avatar
      megaraid: fix BUG_ON() from incorrect use of delayed work · c1d390d8
      Xiaotian Feng authored
      megaraid use INIT_WORK to declare a hotplug_work, but cast the
      hotplug_work from work_struct to delayed_work and
      schedule_delayed_work on it.  This is very dangerous, as other part of
      delayed_work might be kernel memories allocated by others.
      
      With commit 8852aac2
      
       ("workqueue: mod_delayed_work_on() shouldn't queue
      timer on 0 delay"), schedule_delayed_work() will check dwork->timer
      before queue_work even when @delay is 0, this causes megaraid code to
      hit the BUG_ON() in workqueue code.  Change megaraid code to use
      delayed work.
      Signed-off-by: default avatarXiaotian Feng <dannyfeng@tencent.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Neela Syam Kolli <megaraidlinux@lsi.com>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: linux-scsi@vger.kernel.org
      c1d390d8
    • Richard Weinberger's avatar
      UBI: dont call ubi_self_check_all_ff() in __wl_get_peb() · 894aef21
      Richard Weinberger authored
      
      
      As ubi_self_check_all_ff() might sleep we are not allowed
      to call it from atomic context.
      For now we call it only from ubi_wl_get_peb().
      There are some code paths where it would also make sense,
      but these paths are currently atomic and only enabled
      when fastmap is used.
      Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
      Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
      894aef21
    • Richard Weinberger's avatar
      UBI: remove PEB from free tree in get_peb_for_wl() · ed4b7021
      Richard Weinberger authored
      
      
      If UBI is built without fastmap, get_peb_for_wl() has to
      remove the PEB manially from the free tree.
      Otherwise the requested PEB lives in two trees.
      Reported-by: default avatarZach Sadecki <zsadecki@itwatchdogs.com>
      Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
      Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
      ed4b7021
  5. 03 Dec, 2012 5 commits