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From: Daniel Drake <dsd@gentoo.org>
To: LKML <linux-kernel@vger.kernel.org>
Subject: Eeek! page_mapcount(page) went negative! (-1)
Date: Sat, 01 Jul 2006 18:06:33 +0100	[thread overview]
Message-ID: <44A6AB99.8060407@gentoo.org> (raw)

A user at http://bugs.gentoo.org/138366 reported a one-off crash on x86 
with 2.6.16.19. Here's hoping it might be useful to somebody:

Eeek! page_mapcount(page) went negative! (-1)
   page->flags = 8001003c
   page->count = 1
   page->mapping = f6ad2418
------------[ cut here ]------------
kernel BUG at mm/rmap.c:560!
invalid opcode: 0000 [#1]
PREEMPT
CPU:    0
EIP is at page_remove_rmap+0x93/0xa0
eax: ffffffff   ebx: c1234040   ecx: 0000827e   edx: c0374d01
esi: b2570000   edi: c1234040   ebp: cdf8bf2c   esp: cdf8be84
ds: 007b   es: 007b   ss: 0068
Process X (pid: 27937, threadinfo=cdf8a000 task=dc73da90)
Stack: <0>c0327022 f6ad2418 dc6fd5c0 c014592f c1234040 b2570000
11a0 2067 11a02067
        fffffffc ffffffff d6c562e0 b26ab000 e465fb28 b26ab000
cdf8bf2 c c0145ac5
        c03dbbec f0cd96fc e465fb24 b256c000 b26ab000 cdf8bf2c
0000000 0 b26aafff
Call Trace:
  [zap_pte_range+351/576] zap_pte_range+0x15f/0x240
  [<c014592f>] zap_pte_range+0x15f/0x240
  [unmap_page_range+181/320] unmap_page_range+0xb5/0x140
  [<c0145ac5>] unmap_page_range+0xb5/0x140
  [unmap_vmas+239/496] unmap_vmas+0xef/0x1f0
  [<c0145c3f>] unmap_vmas+0xef/0x1f0
  [unmap_region+149/304] unmap_region+0x95/0x130
  [<c014a255>] unmap_region+0x95/0x130
  [do_munmap+275/384] do_munmap+0x113/0x180
  [<c014a5d3>] do_munmap+0x113/0x180
  [sys_munmap+68/112] sys_munmap+0x44/0x70
  [<c014a684>] sys_munmap+0x44/0x70
  [sysenter_past_esp+84/117] sysenter_past_esp+0x54/0x75
  [<c0102ddb>] sysenter_past_esp+0x54/0x75
Code: 53 0c 8b 42 04 c7 04 24 0b 70 32 c0 40 89 44 24 04 e8 c2 b0
fc  ff 8b 43 10 c7 04 24 22 70 32 c0 89 44 24 04 e8 af b0 fc ff eb 86 
<0f> 0b
30 02  e0 6f 32 c0 eb 82 8d 76 00 83 ec 2c 89 5c 24 1c 8b

             reply	other threads:[~2006-07-01 17:02 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-07-01 17:06 Daniel Drake [this message]
2006-07-01 17:07 ` Arjan van de Ven
2006-07-01 17:44   ` Lee Revell
2006-07-01 17:45     ` Arjan van de Ven
2006-07-01 18:11       ` Lee Revell
2006-07-01 21:29         ` Daniel Drake
2006-07-01 17:30 ` Nick Piggin
2006-07-01 18:09   ` Dave Jones
2006-07-01 20:13     ` Alistair John Strachan
2007-02-05  2:39 David Liontooth
2007-02-05  4:48 ` David Liontooth
2007-02-05  5:17   ` Randy Dunlap
2007-02-05  6:10     ` David Liontooth
2007-02-05 13:57       ` Dave Jones
2007-02-05 16:30       ` Randy Dunlap

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