1. 21 5月, 2012 12 次提交
  2. 20 5月, 2012 5 次提交
    • L
      Merge tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6 · d6c77973
      Linus Torvalds 提交于
      Pull PA-RISC fixes from James Bottomley:
       "This is a set of three bug fixes that gets parisc running again on
        systems with PA1.1 processors.
      
        Two fix regressions introduced in 2.6.39 and one fixes a prefetch bug
        that only affects PA7300LC processors.  We also have another pending
        fix to do with the sectional arrangement of vmlinux.lds, but there's a
        query on it during testing on one particular system type, so I'll hold
        off sending it in for now."
      
      * tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
        [PARISC] fix panic on prefetch(NULL) on PA7300LC
        [PARISC] fix crash in flush_icache_page_asm on PA1.1
        [PARISC] fix PA1.1 oops on boot
      d6c77973
    • L
      Merge branch 'x86/ld-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5d120458
      Linus Torvalds 提交于
      Pull x86 linker bug workarounds from Peter Anvin.
      
      GNU ld-2.22.52.0.[12] (*) has an unfortunate bug where it incorrectly
      turns certain relocation entries absolute.  Section-relative symbols
      that are part of otherwise empty sections are silently changed them to
      absolute.  We rely on section-relative symbols staying section-relative,
      and actually have several sections in the linker script solely for this
      purpose.
      
      See for example
      
         http://sourceware.org/bugzilla/show_bug.cgi?id=14052
      
      We could just black-list the buggy linker, but it appears that it got
      shipped in at least F17, and possibly other distros too, so it's sadly
      not some rare unusual case.
      
      This backports the workaround from the x86/trampoline branch, and as
      Peter says: "This is not a minimal fix, not at all, but it is a tested
      code base."
      
      * 'x86/ld-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86, relocs: When printing an error, say relative or absolute
        x86, relocs: Workaround for binutils 2.22.52.0.1 section bug
        x86, realmode: 16-bit real-mode code support for relocs tool
      
      (*) That's a manly release numbering system. Stupid, sure. But manly.
      5d120458
    • L
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 14e931a2
      Linus Torvalds 提交于
      Pull block layer fixes from Jens Axboe:
       "A few small, but important fixes.  Most of them are marked for stable
        as well
      
         - Fix failure to release a semaphore on error path in mtip32xx.
         - Fix crashable condition in bio_get_nr_vecs().
         - Don't mark end-of-disk buffers as mapped, limit it to i_size.
         - Fix for build problem with CONFIG_BLOCK=n on arm at least.
         - Fix for a buffer overlow on UUID partition printing.
         - Trivial removal of unused variables in dac960."
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        block: fix buffer overflow when printing partition UUIDs
        Fix blkdev.h build errors when BLOCK=n
        bio allocation failure due to bio_get_nr_vecs()
        block: don't mark buffers beyond end of disk as mapped
        mtip32xx: release the semaphore on an error path
        dac960: Remove unused variables from DAC960_CreateProcEntries()
      14e931a2
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · a2ae9787
      Linus Torvalds 提交于
      Pull one more networking bug-fix from David Miller:
       "One last straggler.
      
        Eric Dumazet's pktgen unload oops fix was not entirely complete, but
        all the cases should be handled properly now....  fingers crossed."
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        pktgen: fix module unload for good
      a2ae9787
    • H
      memcg,thp: fix res_counter:96 regression · 62ade86a
      Hugh Dickins 提交于
      Occasionally, testing memcg's move_charge_at_immigrate on rc7 shows
      a flurry of hundreds of warnings at kernel/res_counter.c:96, where
      res_counter_uncharge_locked() does WARN_ON(counter->usage < val).
      
      The first trace of each flurry implicates __mem_cgroup_cancel_charge()
      of mc.precharge, and an audit of mc.precharge handling points to
      mem_cgroup_move_charge_pte_range()'s THP handling in commit 12724850
      ("memcg: avoid THP split in task migration").
      
      Checking !mc.precharge is good everywhere else, when a single page is to
      be charged; but here the "mc.precharge -= HPAGE_PMD_NR" likely to
      follow, is liable to result in underflow (a lot can change since the
      precharge was estimated).
      
      Simply check against HPAGE_PMD_NR: there's probably a better
      alternative, trying precharge for more, splitting if unsuccessful; but
      this one-liner is safer for now - no kernel/res_counter.c:96 warnings
      seen in 26 hours.
      Signed-off-by: NHugh Dickins <hughd@google.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      62ade86a
  3. 19 5月, 2012 13 次提交
  4. 18 5月, 2012 10 次提交
    • P
      frv: delete incorrect task prototypes causing compile fail · 93c2d656
      Paul Gortmaker 提交于
      Commit 41101809 ("fork: Provide weak arch_release_[task_struct|
      thread_info] functions") in -tip highlights a problem in the frv arch,
      where it has needles prototypes for alloc_task_struct_node and
      free_task_struct.  This now shows up as:
      
        kernel/fork.c:120:66: error: static declaration of 'alloc_task_struct_node' follows non-static declaration
        kernel/fork.c:127:51: error: static declaration of 'free_task_struct' follows non-static declaration
      
      since that commit turned them into real functions.  Since arch/frv does
      does not define define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR (i.e.  it just
      uses the generic ones) it shouldn't list these at all.
      Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      93c2d656
    • M
      slub: missing test for partial pages flush work in flush_all() · 02e1a9cd
      majianpeng 提交于
      I found some kernel messages such as:
      
          SLUB raid5-md127: kmem_cache_destroy called for cache that still has objects.
          Pid: 6143, comm: mdadm Tainted: G           O 3.4.0-rc6+        #75
          Call Trace:
          kmem_cache_destroy+0x328/0x400
          free_conf+0x2d/0xf0 [raid456]
          stop+0x41/0x60 [raid456]
          md_stop+0x1a/0x60 [md_mod]
          do_md_stop+0x74/0x470 [md_mod]
          md_ioctl+0xff/0x11f0 [md_mod]
          blkdev_ioctl+0xd8/0x7a0
          block_ioctl+0x3b/0x40
          do_vfs_ioctl+0x96/0x560
          sys_ioctl+0x91/0xa0
          system_call_fastpath+0x16/0x1b
      
      Then using kmemleak I found these messages:
      
          unreferenced object 0xffff8800b6db7380 (size 112):
            comm "mdadm", pid 5783, jiffies 4294810749 (age 90.589s)
            hex dump (first 32 bytes):
              01 01 db b6 ad 4e ad de ff ff ff ff ff ff ff ff  .....N..........
              ff ff ff ff ff ff ff ff 98 40 4a 82 ff ff ff ff  .........@J.....
            backtrace:
              kmemleak_alloc+0x21/0x50
              kmem_cache_alloc+0xeb/0x1b0
              kmem_cache_open+0x2f1/0x430
              kmem_cache_create+0x158/0x320
              setup_conf+0x649/0x770 [raid456]
              run+0x68b/0x840 [raid456]
              md_run+0x529/0x940 [md_mod]
              do_md_run+0x18/0xc0 [md_mod]
              md_ioctl+0xba8/0x11f0 [md_mod]
              blkdev_ioctl+0xd8/0x7a0
              block_ioctl+0x3b/0x40
              do_vfs_ioctl+0x96/0x560
              sys_ioctl+0x91/0xa0
              system_call_fastpath+0x16/0x1b
      
      This bug was introduced by commit a8364d55 ("slub: only IPI CPUs that
      have per cpu obj to flush"), which did not include checks for per cpu
      partial pages being present on a cpu.
      Signed-off-by: Nmajianpeng <majianpeng@gmail.com>
      Cc: Gilad Ben-Yossef <gilad@benyossef.com>
      Acked-by: NChristoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Tested-by: NJeff Layton <jlayton@redhat.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      02e1a9cd
    • C
      fs, proc: fix ABBA deadlock in case of execution attempt of map_files/ entries · eb94cd96
      Cyrill Gorcunov 提交于
      map_files/ entries are never supposed to be executed, still curious
      minds might try to run them, which leads to the following deadlock
      
        ======================================================
        [ INFO: possible circular locking dependency detected ]
        3.4.0-rc4-24406-g841e6a6 #121 Not tainted
        -------------------------------------------------------
        bash/1556 is trying to acquire lock:
         (&sb->s_type->i_mutex_key#8){+.+.+.}, at: do_lookup+0x267/0x2b1
      
        but task is already holding lock:
         (&sig->cred_guard_mutex){+.+.+.}, at: prepare_bprm_creds+0x2d/0x69
      
        which lock already depends on the new lock.
      
        the existing dependency chain (in reverse order) is:
      
        -> #1 (&sig->cred_guard_mutex){+.+.+.}:
               validate_chain+0x444/0x4f4
               __lock_acquire+0x387/0x3f8
               lock_acquire+0x12b/0x158
               __mutex_lock_common+0x56/0x3a9
               mutex_lock_killable_nested+0x40/0x45
               lock_trace+0x24/0x59
               proc_map_files_lookup+0x5a/0x165
               __lookup_hash+0x52/0x73
               do_lookup+0x276/0x2b1
               walk_component+0x3d/0x114
               do_last+0xfc/0x540
               path_openat+0xd3/0x306
               do_filp_open+0x3d/0x89
               do_sys_open+0x74/0x106
               sys_open+0x21/0x23
               tracesys+0xdd/0xe2
      
        -> #0 (&sb->s_type->i_mutex_key#8){+.+.+.}:
               check_prev_add+0x6a/0x1ef
               validate_chain+0x444/0x4f4
               __lock_acquire+0x387/0x3f8
               lock_acquire+0x12b/0x158
               __mutex_lock_common+0x56/0x3a9
               mutex_lock_nested+0x40/0x45
               do_lookup+0x267/0x2b1
               walk_component+0x3d/0x114
               link_path_walk+0x1f9/0x48f
               path_openat+0xb6/0x306
               do_filp_open+0x3d/0x89
               open_exec+0x25/0xa0
               do_execve_common+0xea/0x2f9
               do_execve+0x43/0x45
               sys_execve+0x43/0x5a
               stub_execve+0x6c/0xc0
      
      This is because prepare_bprm_creds grabs task->signal->cred_guard_mutex
      and when do_lookup happens we try to grab task->signal->cred_guard_mutex
      again in lock_trace.
      
      Fix it using plain ptrace_may_access() helper in proc_map_files_lookup()
      and in proc_map_files_readdir() instead of lock_trace(), the caller must
      be CAP_SYS_ADMIN granted anyway.
      Signed-off-by: NCyrill Gorcunov <gorcunov@openvz.org>
      Reported-by: NSasha Levin <levinsasha928@gmail.com>
      Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
      Cc: Pavel Emelyanov <xemul@openvz.org>
      Cc: Dave Jones <davej@redhat.com>
      Cc: Vasiliy Kulikov <segoon@openwall.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      eb94cd96
    • R
      drivers/rtc/rtc-pl031.c: configure correct wday for 2000-01-01 · c0a5f4a0
      Rajkumar Kasirajan 提交于
      The reset date of the ST Micro version of PL031 is 2000-01-01.  The
      correct weekday for 2000-01-01 is saturday, but pl031 is initialized to
      sunday.  This may lead to alarm malfunction, so configure the correct
      wday if RTC_DR indicates reset.
      Signed-off-by: NRajkumar Kasirajan <rajkumar.kasirajan@stericsson.com>
      Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      Cc: Mattias Wallin <mattias.wallin@stericsson.com>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c0a5f4a0
    • L
      Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm · 42ea7d7f
      Linus Torvalds 提交于
      Pull ARM fixes from Russell King:
       "Small set of fixes again."
      
      * 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
        ARM: 7419/1: vfp: fix VFP flushing regression on sigreturn path
        ARM: 7418/1: LPAE: fix access flag setup in mem_type_table
        ARM: prevent VM_GROWSDOWN mmaps extending below FIRST_USER_ADDRESS
        ARM: 7417/1: vfp: ensure preemption is disabled when enabling VFP access
      42ea7d7f
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 39c20285
      Linus Torvalds 提交于
      Pull two networking fixes from David S. Miller:
      
      1) Thanks to Willy Tarreau and Eric Dumazet, we've unlocked a bug that's
         been present in do_tcp_sendpages() since that function was written in
         2002.
      
         When we block to wait for memory we have to unconditionally try and
         push out pending TCP data, otherwise we can block for an unreasonably
         long amount of time.
      
      2) Fix deadlock in e1000, fixes kernel bugzilla 43132
      
         From Tushar Dave.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        e1000: Prevent reset task killing itself.
        tcp: do_tcp_sendpages() must try to push data out on oom conditions
      39c20285
    • R
      ACPI / PCI / PM: Fix device PM regression related to D3hot/D3cold · 5c7dd710
      Rafael J. Wysocki 提交于
      Commit 1cc0c998 ("ACPI: Fix D3hot v D3cold confusion") introduced a
      bug in __acpi_bus_set_power() and changed the behavior of
      acpi_pci_set_power_state() in such a way that it generally doesn't work
      as expected if PCI_D3hot is passed to it as the second argument.
      
      First off, if ACPI_STATE_D3 (equal to ACPI_STATE_D3_COLD) is passed to
      __acpi_bus_set_power() and the explicit_set flag is set for the D3cold
      state, the function will try to execute AML method called "_PS4", which
      doesn't exist.
      
      Fix this by adding a check to ensure that the name of the AML method
      to execute for transitions to ACPI_STATE_D3_COLD is correct in
      __acpi_bus_set_power().  Also make sure that the explicit_set flag
      for ACPI_STATE_D3_COLD will be set if _PS3 is present and modify
      acpi_power_transition() to avoid accessing power resources for
      ACPI_STATE_D3_COLD, because they don't exist.
      
      Second, if PCI_D3hot is passed to acpi_pci_set_power_state() as the
      target state, the function will request a transition to
      ACPI_STATE_D3_HOT instead of ACPI_STATE_D3.  However,
      ACPI_STATE_D3_HOT is now only marked as supported if the _PR3 AML
      method is defined for the given device, which is rare.  This causes
      problems to happen on systems where devices were successfully put
      into ACPI D3 by pci_set_power_state(PCI_D3hot) which doesn't work
      now.  In particular, some unused graphics adapters are not turned
      off as a result.
      
      To fix this issue restore the old behavior of
      acpi_pci_set_power_state(), which is to request a transition to
      ACPI_STATE_D3 (equal to ACPI_STATE_D3_COLD) if either PCI_D3hot or
      PCI_D3cold is passed to it as the argument.
      
      This approach is not ideal, because generally power should not
      be removed from devices if PCI_D3hot is the target power state,
      but since this behavior is relied on, we have no choice but to
      restore it at the moment and spend more time on designing a
      better solution in the future.
      
      References: https://bugzilla.kernel.org/show_bug.cgi?id=43228Reported-by: Nrocko <rockorequin@hotmail.com>
      Reported-by: NCristian Rodríguez <crrodriguez@opensuse.org>
      Reported-and-tested-by: NPeter <lekensteyn@gmail.com>
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      5c7dd710
    • T
      e1000: Prevent reset task killing itself. · 8ce6909f
      Tushar Dave 提交于
      Killing reset task while adapter is resetting causes deadlock.
      Only kill reset task if adapter is not resetting.
      Ref bug #43132 on bugzilla.kernel.org
      
      CC: stable@vger.kernel.org
      Signed-off-by: NTushar Dave <tushar.n.dave@intel.com>
      Tested-by: NAaron Brown <aaron.f.brown@intel.com>
      Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      8ce6909f
    • W
      tcp: do_tcp_sendpages() must try to push data out on oom conditions · bad115cf
      Willy Tarreau 提交于
      Since recent changes on TCP splicing (starting with commits 2f533844
      "tcp: allow splice() to build full TSO packets" and 35f9c09f "tcp:
      tcp_sendpages() should call tcp_push() once"), I started seeing
      massive stalls when forwarding traffic between two sockets using
      splice() when pipe buffers were larger than socket buffers.
      
      Latest changes (net: netdev_alloc_skb() use build_skb()) made the
      problem even more apparent.
      
      The reason seems to be that if do_tcp_sendpages() fails on out of memory
      condition without being able to send at least one byte, tcp_push() is not
      called and the buffers cannot be flushed.
      
      After applying the attached patch, I cannot reproduce the stalls at all
      and the data rate it perfectly stable and steady under any condition
      which previously caused the problem to be permanent.
      
      The issue seems to have been there since before the kernel migrated to
      git, which makes me think that the stalls I occasionally experienced
      with tux during stress-tests years ago were probably related to the
      same issue.
      
      This issue was first encountered on 3.0.31 and 3.2.17, so please backport
      to -stable.
      Signed-off-by: NWilly Tarreau <w@1wt.eu>
      Acked-by: NEric Dumazet <edumazet@google.com>
      Cc: <stable@vger.kernel.org>
      bad115cf
    • L
      Merge branch '3.4-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · eea03647
      Linus Torvalds 提交于
      Pull two more target-core updates from Nicholas Bellinger:
       "The first patch addresses a SPC-2 reservations RELEASE bug in a
        special (iscsi specific) multi-ISID setup case that was allowing the
        same initiator to be able to incorrect release it's own reservation on
        a different SCSI path with enforce_pr_isid=1 operation.  This bug was
        caught by Bernhard Kohl.
      
        The second patch is to address a bug with FILEIO backends where the
        incorrect number of blocks for READ_CAPACITY was being reported after
        an underlying device-mapper block_device size change.  This patch uses
        now i_size_read() in fd_get_blocks() for FILEIO backends with an
        underlying block_device, instead of trying to determine this value at
        setup time during fd_create_virtdevice().  (hch CC'ed)
      
        Both are CC'ed to stable."
      
      * '3.4-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        target: Fix bug in handling of FILEIO + block_device resize ops
        target: Fix SPC-2 RELEASE bug for multi-session iSCSI client setups
      eea03647