lkml.org 
[lkml]   [2008]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: repeatable slab corruption with LTP msgctl08
    Nadia Derbey wrote:
    > Andrew Morton wrote:
    >
    >> Running current mainline on my old 2-way PIII. Distro is RH FC1. LTP
    >> version is ltp-full-20070228 (lots of retro-computing there).
    >>
    >> Config is at http://userweb.kernel.org/~akpm/config-vmm.txt
    >>
    >>
    >> ./testcases/bin/msgctl08 crashes after ten minutes or so:
    >>
    >> slab: Internal list corruption detected in cache 'size-128'(26), slabp
    >> f2905000(20). Hexdump:
    >>
    >> 000: 00 e0 12 f2 88 32 c0 f7 88 00 00 00 88 50 90 f2
    >> 010: 14 00 00 00 0f 00 00 00 00 00 00 00 ff ff ff ff
    >> 020: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff
    >> 030: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff
    >> 040: fd ff ff ff fd ff ff ff 00 00 00 00 fd ff ff ff
    >> 050: fd ff ff ff fd ff ff ff 19 00 00 00 17 00 00 00
    >> 060: fd ff ff ff fd ff ff ff 0b 00 00 00 fd ff ff ff
    >> 070: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff
    >> 080: 10 00 00 00
    >> ------------[ cut here ]------------
    >> kernel BUG at mm/slab.c:2949!
    >> invalid opcode: 0000 [#1] SMP Modules linked in:
    >>
    >> Pid: 3348, comm: msgctl08 Not tainted (2.6.26-rc5 #1)
    >> EIP: 0060:[<c017a35b>] EFLAGS: 00010086 CPU: 0
    >> EIP is at check_slabp+0xeb/0x100
    >> EAX: 00000001 EBX: f2905083 ECX: 00000001 EDX: f20ee670
    >> ESI: f2905000 EDI: 00000084 EBP: f4671e88 ESP: f4671e64
    >> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
    >> Process msgctl08 (pid: 3348, ti=f4670000 task=f20ee670 task.ti=f4670000)
    >> Stack: c0472f2b 00000000 0000001a f2905000 00000014 f7c01500 ffffffff
    >> 0000000e f2905000 f4671eec c017b69f 00000010 000000d0 f20ee670
    >> f7c032ac 000000d0 f7c01500 0000000e f7c03288 f7c06df0 f29ec088
    >> 00000098 00000000 00000000 Call Trace:
    >> [<c017b69f>] ? cache_alloc_refill+0xcf/0x6b0
    >> [<c017bdd4>] ? __kmalloc+0x154/0x160
    >> [<c0257663>] ? load_msg+0x33/0x150
    >> [<c0257663>] ? load_msg+0x33/0x150
    >> [<c0257dfb>] ? do_msgsnd+0x17b/0x2e0
    >> [<c0257cc9>] ? do_msgsnd+0x49/0x2e0
    >> [<c0126f1f>] ? __do_softirq+0x6f/0x100
    >> [<c0126e58>] ? _local_bh_enable+0x48/0xa0
    >> [<c0257f92>] ? sys_msgsnd+0x32/0x40
    >> [<c0106e12>] ? sys_ipc+0xb2/0x240
    >> [<c0102f58>] ? sysenter_past_esp+0xa5/0xb1
    >> [<c0102f1d>] ? sysenter_past_esp+0x6a/0xb1
    >> =======================
    >> Code: 86 fa ff 8b 55 f0 8b 42 38 8d 04 85 1c 00 00 00 39 f8 76 0b 43
    >> f7 c7 0f 00 00 00 75 d2 eb bd c7 04 24 2b 2f 47 c0 e8 85 86 fa ff <0f>
    >> 0b eb fe 83 c4 18 5b 5e 5f 5d c3 8b 56 10 e9 6b ff ff ff 90 EIP:
    >> [<c017a35b>] check_slabp+0xeb/0x100 SS:ESP 0068:f4671e64
    >> ---[ end trace d7a2cbbb5a3654be ]---
    >>
    >>
    >> Pekka (or Christoph): could you please decrypt the slab bits for us?
    >>
    >
    > Andrew,
    >
    > Sorry for answering so late (I only saw you e-mail yesterday afternoon).
    > I have just run msgctl08, setting msgmni to 1722 and turning on the SLAB
    > debug:
    >
    > CONFIG_SLAB=y
    > CONFIG_SLABINFO=y
    > CONFIG_DEBUG_SLAB=y
    > CONFIG_DEBUG_SLAB_LEAK=y
    >
    > kernel: linux-2.6.26-rc5-mm1
    > ltp: ltp-full-20080430
    >
    > But I could not reproduce the bug.
    >
    > Will try to investigate more.
    >

    Same result with 2.6.26-rc6.
    I saw from your config file that you're running a 2.6.26-rc2. Will try
    with that one.

    Regards,
    Nadia


    \
     
     \ /
      Last update: 2008-06-13 10:35    [W:0.051 / U:90.980 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site