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From: Andreas Schultz (aschultz_at_warp10.net)
Date: Mon 26 Sep 2005 - 14:13:31 BST


Hi,

I got 2 BUG() messages for the same place when trying to restart a vserver.

System: Dell 1425SC, Dual Xenon with AMD64 Kernel
Kernel: 2.6.13.4
Vserver: 2.6.13.1-vs2.1.0-rc2

Regards
Andreas

*************** First Opps:

ksymoops 2.4.9 on x86_64 2.6.13+vserver. Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.6.13+vserver/ (default)
     -m /boot/System.map-2.6.13+vserver (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Sep 26 13:00:03 cspweb01 kernel: Kernel BUG at "kernel/vserver/context.c":144
Sep 26 13:00:03 cspweb01 kernel: invalid operand: 0000 [1] SMP
Sep 26 13:00:03 cspweb01 kernel: CPU 2
Sep 26 13:00:03 cspweb01 kernel: Pid: 10252, comm: mount Not tainted 2.6.13+vserver
Sep 26 13:00:03 cspweb01 kernel: RIP: 0010:[free_vx_info+28/152] <ffffffff8014abb1>{free_vx_info+28}
Using defaults from ksymoops -t elf64-x86-64 -a i386:x86-64
Sep 26 13:00:03 cspweb01 kernel: RSP: 0018:ffff81006ca1bcc0 EFLAGS: 00010246
Sep 26 13:00:03 cspweb01 kernel: RAX: 0000000000000000 RBX: ffff8100585090f0 RCX: ffff8100023279e8
Sep 26 13:00:03 cspweb01 kernel: RDX: 0000000000000001 RSI: 0000000000000292 RDI: ffff810054ce0000
Sep 26 13:00:03 cspweb01 kernel: RBP: ffff810067b4f320 R08: ffff810067b4f320 R09: ffff810077c4b548
Sep 26 13:00:03 cspweb01 kernel: R10: ffff81005551ed20 R11: ffffffff80198a56 R12: ffff8100702f79f8
Sep 26 13:00:03 cspweb01 kernel: R13: ffff81007ff9fa00 R14: ffff8100702f7918 R15: 0000000000000000
Sep 26 13:00:03 cspweb01 kernel: FS: 00002aaaab00c6d0(0000) GS:ffffffff8042c900(0000) knlGS:0000000000000000
Sep 26 13:00:03 cspweb01 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 26 13:00:03 cspweb01 kernel: CR2: 0000000000516000 CR3: 0000000035129000 CR4: 00000000000006e0
Sep 26 13:00:03 cspweb01 kernel: Stack: ffffffff8012ff1a ffff810067b4f300 ffffffff801b1824 ffff810067b4fa70
Sep 26 13:00:03 cspweb01 kernel: ffff810067b4f320 ffffffff801b17fe ffffffff80198b53 ffff810067b4f320
Sep 26 13:00:03 cspweb01 kernel: ffff8100702f79f0 ffff810067b4f320
Sep 26 13:00:03 cspweb01 kernel: Call Trace:<ffffffff8012ff1a>{free_task+48} <ffffffff801b1824>{proc_delete_inode+38}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff801b17fe>{proc_delete_inode+0} <ffffffff80198b53>{generic_delete_inode+253}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff8019649d>{dput+439} <ffffffff80197495>{shrink_dcache_sb+496}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff80184410>{do_remount_sb+75} <ffffffff8019bbb9>{do_mount+671}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff8016f3a3>{do_no_page+1399} <ffffffff8016463a>{buffered_rmqueue+509}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff801647bf>{__alloc_pages+259} <ffffffff8019c218>{sys_mount+138}
Sep 26 13:00:03 cspweb01 kernel: <ffffffff8010d9ea>{system_call+126}
Sep 26 13:00:03 cspweb01 kernel: Code: 0f 0b a3 a0 5e 2e 80 ff ff ff ff c2 90 00 8b 47 14 85 c0 74

>>RIP; ffffffff8014abb1 <free_vx_info+1c/98> <=====

>>RBX; ffff8100585090f0 <phys_startup_64+ffff810058408ff0/ffffffff7fffff00>
>>RCX; ffff8100023279e8 <phys_startup_64+ffff8100022278e8/ffffffff7fffff00>
>>RDI; ffff810054ce0000 <phys_startup_64+ffff810054bdff00/ffffffff7fffff00>
>>RBP; ffff810067b4f320 <phys_startup_64+ffff810067a4f220/ffffffff7fffff00>
>>R08; ffff810067b4f320 <phys_startup_64+ffff810067a4f220/ffffffff7fffff00>
>>R09; ffff810077c4b548 <phys_startup_64+ffff810077b4b448/ffffffff7fffff00>
>>R10; ffff81005551ed20 <phys_startup_64+ffff81005541ec20/ffffffff7fffff00>
>>R11; ffffffff80198a56 <generic_delete_inode+0/174>
>>R12; ffff8100702f79f8 <phys_startup_64+ffff8100701f78f8/ffffffff7fffff00>
>>R13; ffff81007ff9fa00 <phys_startup_64+ffff81007fe9f900/ffffffff7fffff00>
>>R14; ffff8100702f7918 <phys_startup_64+ffff8100701f7818/ffffffff7fffff00>

Trace; ffffffff8012ff1a <free_task+30/5e>
Trace; ffffffff801b17fe <proc_delete_inode+0/77>
Trace; ffffffff8019649d <dput+1b7/1fe>
Trace; ffffffff80184410 <do_remount_sb+4b/174>
Trace; ffffffff8016f3a3 <do_no_page+577/5dd>
Trace; ffffffff801647bf <__alloc_pages+103/448>
Trace; ffffffff8010d9ea <system_call+7e/83>

Code; ffffffff8014abb1 <free_vx_info+1c/98>
0000000000000000 <_RIP>:
Code; ffffffff8014abb1 <free_vx_info+1c/98> <=====
   0: 0f 0b ud2a <=====
Code; ffffffff8014abb3 <free_vx_info+1e/98>
   2: a3 a0 5e 2e 80 ff ff mov %eax,0xffffffff802e5ea0
Code; ffffffff8014abba <free_vx_info+25/98>
   9: ff ff
Code; ffffffff8014abbc <free_vx_info+27/98>
   b: c2 90 00 retq $0x90
Code; ffffffff8014abbf <free_vx_info+2a/98>
   e: 8b 47 14 mov 0x14(%rdi),%eax
Code; ffffffff8014abc2 <free_vx_info+2d/98>
  11: 85 c0 test %eax,%eax
Code; ffffffff8014abc4 <free_vx_info+2f/98>
  13: 74 00 je 15 <_RIP+0x15>

1 warning and 1 error issued. Results may not be reliable.

*************** Second Opps:
ksymoops 2.4.9 on x86_64 2.6.13+vserver. Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.6.13+vserver/ (default)
     -m /boot/System.map-2.6.13+vserver (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Sep 26 13:00:06 cspweb01 kernel: Kernel BUG at "kernel/vserver/context.c":144
Sep 26 13:00:06 cspweb01 kernel: invalid operand: 0000 [2] SMP
Sep 26 13:00:06 cspweb01 kernel: CPU 2
Sep 26 13:00:06 cspweb01 kernel: Pid: 10273, comm: grep Not tainted 2.6.13+vserver
Sep 26 13:00:06 cspweb01 kernel: RIP: 0010:[free_vx_info+28/152] <ffffffff8014abb1>{free_vx_info+28}
Using defaults from ksymoops -t elf64-x86-64 -a i386:x86-64
Sep 26 13:00:06 cspweb01 kernel: RSP: 0018:ffff81002fe3bc90 EFLAGS: 00010246
Sep 26 13:00:06 cspweb01 kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000013
Sep 26 13:00:06 cspweb01 kernel: RDX: 0000000000000001 RSI: ffff810002e6a088 RDI: ffff810054ce0000
Sep 26 13:00:06 cspweb01 kernel: RBP: ffff810034e0b1b0 R08: ffff810034e0b271 R09: 0000000000000005
Sep 26 13:00:06 cspweb01 kernel: R10: ffffffff8017e0b5 R11: ffffffff801cca3c R12: ffff810054ce0000
Sep 26 13:00:06 cspweb01 kernel: R13: ffff810067b4f098 R14: ffff810034e0b450 R15: ffff81002fe3bd38
Sep 26 13:00:06 cspweb01 kernel: FS: 00002aaaaae00ae0(0000) GS:ffffffff8042c900(0000) knlGS:0000000000000000
Sep 26 13:00:06 cspweb01 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 26 13:00:06 cspweb01 kernel: CR2: 00002aaaaac80080 CR3: 000000002c80c000 CR4: 00000000000006e0
Sep 26 13:00:06 cspweb01 kernel: Stack: ffffffff8015123d 000000012fe3bd38 ffff810034e0b1b0 ffff81002fe3bed8
Sep 26 13:00:06 cspweb01 kernel: ffff81002fe3bd28 ffff810067b4f160 ffffffff8018bb8a ffff81007e334d60
Sep 26 13:00:06 cspweb01 kernel: ffff81007fe19240 ffff810067b4f098
Sep 26 13:00:06 cspweb01 kernel: Call Trace:<ffffffff8015123d>{proc_virtual_lookup+598} <ffffffff8018bb8a>{do_lookup+392}
Sep 26 13:00:06 cspweb01 kernel: <ffffffff8018ca11>{__link_path_walk+970} <ffffffff8018d6cd>{link_path_walk+94}
Sep 26 13:00:06 cspweb01 kernel: <ffffffff8017e0b5>{get_unused_fd+257} <ffffffff8018dc90>{path_lookup+456}
Sep 26 13:00:06 cspweb01 kernel: <ffffffff8018f315>{open_namei+196} <ffffffff8017df96>{filp_open+45}
Sep 26 13:00:06 cspweb01 kernel: <ffffffff8017e0b5>{get_unused_fd+257} <ffffffff8017e178>{sys_open+64}
Sep 26 13:00:06 cspweb01 kernel: <ffffffff8010d9ea>{system_call+126}
Sep 26 13:00:06 cspweb01 kernel: Code: 0f 0b a3 a0 5e 2e 80 ff ff ff ff c2 90 00 8b 47 14 85 c0 74

>>RIP; ffffffff8014abb1 <free_vx_info+1c/98> <=====

>>RSI; ffff810002e6a088 <phys_startup_64+ffff810002d69f88/ffffffff7fffff00>
>>RDI; ffff810054ce0000 <phys_startup_64+ffff810054bdff00/ffffffff7fffff00>
>>RBP; ffff810034e0b1b0 <phys_startup_64+ffff810034d0b0b0/ffffffff7fffff00>
>>R08; ffff810034e0b271 <phys_startup_64+ffff810034d0b171/ffffffff7fffff00>
>>R10; ffffffff8017e0b5 <get_unused_fd+101/112>
>>R11; ffffffff801cca3c <dummy_d_instantiate+0/1>
>>R12; ffff810054ce0000 <phys_startup_64+ffff810054bdff00/ffffffff7fffff00>
>>R13; ffff810067b4f098 <phys_startup_64+ffff810067a4ef98/ffffffff7fffff00>
>>R14; ffff810034e0b450 <phys_startup_64+ffff810034d0b350/ffffffff7fffff00>
>>R15; ffff81002fe3bd38 <phys_startup_64+ffff81002fd3bc38/ffffffff7fffff00>

Trace; ffffffff8015123d <proc_virtual_lookup+256/279>
Trace; ffffffff8018ca11 <__link_path_walk+3ca/1028>
Trace; ffffffff8017e0b5 <get_unused_fd+101/112>
Trace; ffffffff8018f315 <open_namei+c4/74f>
Trace; ffffffff8017e0b5 <get_unused_fd+101/112>
Trace; ffffffff8010d9ea <system_call+7e/83>

Code; ffffffff8014abb1 <free_vx_info+1c/98>
0000000000000000 <_RIP>:
Code; ffffffff8014abb1 <free_vx_info+1c/98> <=====
   0: 0f 0b ud2a <=====
Code; ffffffff8014abb3 <free_vx_info+1e/98>
   2: a3 a0 5e 2e 80 ff ff mov %eax,0xffffffff802e5ea0
Code; ffffffff8014abba <free_vx_info+25/98>
   9: ff ff
Code; ffffffff8014abbc <free_vx_info+27/98>
   b: c2 90 00 retq $0x90
Code; ffffffff8014abbf <free_vx_info+2a/98>
   e: 8b 47 14 mov 0x14(%rdi),%eax
Code; ffffffff8014abc2 <free_vx_info+2d/98>
  11: 85 c0 test %eax,%eax
Code; ffffffff8014abc4 <free_vx_info+2f/98>
  13: 74 00 je 15 <_RIP+0x15>

1 warning and 1 error issued. Results may not be reliable.


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