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Bug 150181 - BUG: unable to handle kernel NULL pointer dereference
Summary: BUG: unable to handle kernel NULL pointer dereference
Status: RESOLVED INVALID
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: x86 Linux
: Highest major
Assignee: Gentoo Linux bug wranglers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-10-05 10:09 UTC by Maarten Billemont
Modified: 2006-10-05 10:11 UTC (History)
0 users

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Runtime testing required: ---

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Description Maarten Billemont 2006-10-05 10:09:10 UTC 
The following happened during revdep-rebuild and emerge -uvDNa world:
 
 [4295291.573000] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 [4295291.573000]  printing eip:
 [4295291.573000] b016d958
 [4295291.573000] *pde = 00000000
 [4295291.573000] Oops: 0000 [#1]
 [4295291.573000] PREEMPT
 [4295291.573000] Modules linked in: nfsd exportfs lockd sunrpc vmnet parport_pc parport vmmon rlocate unionfs squashfs a[4295291.573000] CPU:    0
 [4295291.573000] EIP:    0060:[<b016d958>]    Tainted: PF     VLI
 [4295291.573000] EFLAGS: 00010286   (2.6.17-beyond3 #1)
 [4295291.573000] EIP is at drop_buffers+0x18/0xa0
 [4295291.573000] eax: 00000000   ebx: b1315e00   ecx: 00000000   edx: 00000000
 [4295291.573000] esi: b1315e00   edi: c8aac3c0   ebp: b1315e00   esp: eddd9e34
 [4295291.573000] ds: 007b   es: 007b   ss: 0068
 [4295291.573000] Process kswapd0 (pid: 161, threadinfo=eddd8000 task=dff8da50)
 [4295291.573000] Stack: eddd9e4c b1315e00 b1315e00 00000000 eddd9fa4 b016da5a 00000000 b1315e00
 [4295291.573000]        b1315e18 b040e150 b0156320 eddd9f30 eddd9f20 eddd9f28 eddd8000 b040e228
 [4295291.573000]        00000020 00000000 00000000 00000020 00000002 eddd8000 00000001 00000001
 [4295291.573000] Call Trace:
 [4295291.573000]  <b016da5a> try_to_free_buffers+0x7a/0xa0  <b0156320> shrink_inactive_list+0x5a0/0x740
 [4295291.573000]  <b0155845> shrink_active_list+0x3d5/0x4e0  <b0156671> shrink_zone+0x91/0xe0
 [4295291.573000]  <b0156af9> kswapd+0x3c9/0x4c0  <b012e420> autoremove_wake_function+0x0/0x50
 [4295291.573000]  <b0156730> kswapd+0x0/0x4c0  <b0101005> kernel_thread_helper+0x5/0x10
 [4295291.573000] Code: 00 00 00 e8 ab 07 fb ff 8d 74 26 00 8d bc 27 00 00 00 00 55 89 c5 57 56 53 83 ec 04 89 14 24 8b 0[4295291.573000] EIP: [<b016d958>] drop_buffers+0x18/0xa0 SS:ESP 0068:eddd9e34
 [4295291.573000]
 
 
 The process kswapd0 would lead me to believe this is a swapping issue, could a corrupted swap cause this?
Comment 1 Jakub Moc (RETIRED) gentoo-dev 2006-10-05 10:11:17 UTC 
beyond-sources is not a supported kernel, it's not even distributed by us. (Plus your kernel is tainted anyway).