Hi all,<br><br>Here is kernel bug for linux-2.6.29.6 for PowerPC (ppc440) target, while running ipsec application it is observed that kernel oops'es oftenly as show below :<br><br><pre>root@powerpc:~# ./ipsec<br>------------[ cut here ]------------<br>
kernel BUG at mm/slab.c:3002!<br>Oops: Exception in kernel mode, sig: 5 [#1]<br>PREEMPT LTT NESTING LEVEL : 0<br>Xilinx Virtex440<br>Modules linked in: nls_iso8859_1 nfsd<br>NIP: c00a1e94 LR: c00a1d3c CTR: 0000000b<br>REGS: ce8c9d20 TRAP: 0700 Not tainted (2.6.29.6.xilinx-ml507.0908010910-ipsec)<br>
MSR: 00021000 <ME,CE> CR: 22024428 XER: 00000005<br>TASK = cfa2a430[974] 'watchdog' THREAD: ce8c8000<br>GPR00: 00000028 ce8c9dd0 cfa2a430 cf802ea8 cf9e001c 0000000a cf9e0000 ffffffff<br>GPR08: 00000d80 00000001 0000000a 00000028 cf802ea0 1002b58c c0547bd0 c0547bd4<br>
GPR16: c0547ba0 c050dd78 c050e60c 000000d0 00000000 00200200 00100100 00000001<br>GPR24: ce8c8034 ce8c8000 00000000 c0520000 00000000 cf802eb0 cf807560 cf809e00<br>NIP [c00a1e94] cache_alloc_refill+0x138/0x630<br>LR [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>
Call Trace:<br>[ce8c9dd0] [c050e60c] 0xc050e60c (unreliable)<br>[ce8c9e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce8c9e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce8c9e70] [c005382c] copy_creds+0xa0/0x12c<br>[ce8c9e80] [c00307dc] copy_process+0x1c0/0xe20<br>
[ce8c9ee0] [c00314b8] do_fork+0x7c/0x338<br>[ce8c9f20] [c00065b4] sys_clone+0x58/0x88<br>[ce8c9f40] [c000e164] ret_from_syscall+0x0/0x3c<br>Instruction dump:<br>2f8a0000 3bac0010 386c0008 409d0104 80cc0000 7f8c3000 419e00e8 81660010<br>
801e001c 7d205810 39200000 7d294914 <0f090000> 7f8b0040 7d455378 409c0074<br>---[ end trace b098f3001b420338 ]---<br>note: watchdog[974] exited with preempt_count 1<br>BUG: scheduling while atomic: watchdog/974/0x10000002<br>
Modules linked in: nls_iso8859_1 nfsd<br>Call Trace:<br>[ce8c99e0] [c0006184] show_stack+0x40/0x15c (unreliable)<br>[ce8c9a10] [c002bab4] __schedule_bug+0x68/0x6c<br>[ce8c9a20] [c03d5138] schedule+0x2bc/0x36c<br>[ce8c9a70] [c002bae0] __cond_resched+0x28/0x54<br>
[ce8c9a80] [c03d5304] _cond_resched+0x50/0x58<br>[ce8c9a90] [c00925c8] __mlock_vma_pages_range+0x84/0x2c4<br>[ce8c9b20] [c0094084] exit_mmap+0x60/0x1b0<br>[ce8c9b50] [c002fe64] mmput+0x50/0x114<br>[ce8c9b60] [c0034120] exit_mm+0x130/0x14c<br>
[ce8c9b90] [c0035db4] do_exit+0xd0/0x6b8<br>[ce8c9be0] [c000c234] die+0x1b0/0x1b8<br>[ce8c9c10] [c000c554] _exception+0x1d4/0x2b4<br>[ce8c9d10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce8c9dd0] [c050e60c] 0xc050e60c<br>
[ce8c9e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce8c9e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce8c9e70] [c005382c] copy_creds+0xa0/0x12c<br>[ce8c9e80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce8c9ee0] [c00314b8] do_fork+0x7c/0x338<br>
[ce8c9f20] [c00065b4] sys_clone+0x58/0x88<br>[ce8c9f40] [c000e164] ret_from_syscall+0x0/0x3c<br>BUG: scheduling while atomic: watchdog/974/0x10000002<br>Modules linked in: nls_iso8859_1 nfsd<br>Call Trace:<br>[ce8c99e0] [c0006184] show_stack+0x40/0x15c (unreliable)<br>
[ce8c9a10] [c002bab4] __schedule_bug+0x68/0x6c<br>[ce8c9a20] [c03d5138] schedule+0x2bc/0x36c<br>[ce8c9a70] [c002bae0] __cond_resched+0x28/0x54<br>[ce8c9a80] [c03d5304] _cond_resched+0x50/0x58<br>[ce8c9a90] [c00925c8] __mlock_vma_pages_range+0x84/0x2c4<br>
[ce8c9b20] [c0094084] exit_mmap+0x60/0x1b0<br>[ce8c9b50] [c002fe64] mmput+0x50/0x114<br>[ce8c9b60] [c0034120] exit_mm+0x130/0x14c<br>[ce8c9b90] [c0035db4] do_exit+0xd0/0x6b8<br>[ce8c9be0] [c000c234] die+0x1b0/0x1b8<br>[ce8c9c10] [c000c554] _exception+0x1d4/0x2b4<br>
[ce8c9d10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce8c9dd0] [c050e60c] 0xc050e60c<br>[ce8c9e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce8c9e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce8c9e70] [c005382c] copy_creds+0xa0/0x12c<br>
[ce8c9e80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce8c9ee0] [c00314b8] do_fork+0x7c/0x338<br>[ce8c9f20] [c00065b4] sys_clone+0x58/0x88<br>[ce8c9f40] [c000e164] ret_from_syscall+0x0/0x3c<br><br>root@inson:~#<br>root@inson:~# ------------[ cut here ]------------<br>
kernel BUG at mm/slab.c:3002!<br>Oops: Exception in kernel mode, sig: 5 [#2]<br>PREEMPT LTT NESTING LEVEL : 0<br>Xilinx Virtex440<br>Modules linked in: nls_iso8859_1 nfsd<br>NIP: c00a1e94 LR: c00a1d3c CTR: 0000000a<br>REGS: ce9cbd20 TRAP: 0700 Tainted: G D (2.6.29.6.xilinx-ml507.0908010910-ipsec)<br>
MSR: 00021000 <ME,CE> CR: 22424848 XER: 00000001<br>TASK = ce8fe030[1400] 'mvtsd.py' THREAD: ce9ca000<br>GPR00: 00000028 ce9cbdd0 ce8fe030 cf802ea8 cf9e001c 00000009 cf9e0000 ffffffff<br>GPR08: 00000d20 00000001 00000009 00000028 cf802ea0 10018a3c c0547bd0 c0547bd4<br>
GPR16: c0547ba0 c050dd78 c050e60c 000000d0 00000000 00200200 00100100 00000001<br>GPR24: ce9ca034 ce9ca000 00000000 c0520000 00000000 cf802eb0 cf807560 cf809e00<br>NIP [c00a1e94] cache_alloc_refill+0x138/0x630<br>LR [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>
Call Trace:<br>[ce9cbdd0] [c050e60c] 0xc050e60c (unreliable)<br>[ce9cbe30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce9cbe50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce9cbe70] [c005382c] copy_creds+0xa0/0x12c<br>[ce9cbe80] [c00307dc] copy_process+0x1c0/0xe20<br>
[ce9cbee0] [c00314b8] do_fork+0x7c/0x338<br>[ce9cbf20] [c00065b4] sys_clone+0x58/0x88<br>[ce9cbf40] [c000e164] ret_from_syscall+0x0/0x3c<br>Instruction dump:<br>2f8a0000 3bac0010 386c0008 409d0104 80cc0000 7f8c3000 419e00e8 81660010<br>
801e001c 7d205810 39200000 7d294914 <0f090000> 7f8b0040 7d455378 409c0074<br>---[ end trace b098f3001b420339 ]---<br>note: mvtsd.py[1400] exited with preempt_count 1<br>BUG: scheduling while atomic: mvtsd.py/1400/0x10000002<br>
Modules linked in: nls_iso8859_1 nfsd<br>Call Trace:<br>[ce9cb9e0] [c0006184] show_stack+0x40/0x15c (unreliable)<br>[ce9cba10] [c002bab4] __schedule_bug+0x68/0x6c<br>[ce9cba20] [c03d5138] schedule+0x2bc/0x36c<br>[ce9cba70] [c002bae0] __cond_resched+0x28/0x54<br>
[ce9cba80] [c03d5304] _cond_resched+0x50/0x58<br>[ce9cba90] [c008f074] unmap_vmas+0x4d0/0x698<br>[ce9cbb20] [c00940ec] exit_mmap+0xc8/0x1b0<br>[ce9cbb50] [c002fe64] mmput+0x50/0x114<br>[ce9cbb60] [c0034120] exit_mm+0x130/0x14c<br>
[ce9cbb90] [c0035db4] do_exit+0xd0/0x6b8<br>[ce9cbbe0] [c000c234] die+0x1b0/0x1b8<br>[ce9cbc10] [c000c554] _exception+0x1d4/0x2b4<br>[ce9cbd10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce9cbdd0] [c050e60c] 0xc050e60c<br>
[ce9cbe30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce9cbe50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce9cbe70] [c005382c] copy_creds+0xa0/0x12c<br>[ce9cbe80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce9cbee0] [c00314b8] do_fork+0x7c/0x338<br>
[ce9cbf20] [c00065b4] sys_clone+0x58/0x88<br>[ce9cbf40] [c000e164] ret_from_syscall+0x0/0x3c<br>BUG: scheduling while atomic: mvtsd.py/1400/0x10000002<br>Modules linked in: nls_iso8859_1 nfsd<br>Call Trace:<br>[ce9cb9e0] [c0006184] show_stack+0x40/0x15c (unreliable)<br>
[ce9cba10] [c002bab4] __schedule_bug+0x68/0x6c<br>[ce9cba20] [c03d5138] schedule+0x2bc/0x36c<br>[ce9cba70] [c002bae0] __cond_resched+0x28/0x54<br>[ce9cba80] [c03d5304] _cond_resched+0x50/0x58<br>[ce9cba90] [c008f074] unmap_vmas+0x4d0/0x698<br>
[ce9cbb20] [c00940ec] exit_mmap+0xc8/0x1b0<br>[ce9cbb50] [c002fe64] mmput+0x50/0x114<br>[ce9cbb60] [c0034120] exit_mm+0x130/0x14c<br>[ce9cbb90] [c0035db4] do_exit+0xd0/0x6b8<br>[ce9cbbe0] [c000c234] die+0x1b0/0x1b8<br>[ce9cbc10] [c000c554] _exception+0x1d4/0x2b4<br>
[ce9cbd10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce9cbdd0] [c050e60c] 0xc050e60c<br>[ce9cbe30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce9cbe50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce9cbe70] [c005382c] copy_creds+0xa0/0x12c<br>
[ce9cbe80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce9cbee0] [c00314b8] do_fork+0x7c/0x338<br>[ce9cbf20] [c00065b4] sys_clone+0x58/0x88<br>[ce9cbf40] [c000e164] ret_from_syscall+0x0/0x3c<br>------------[ cut here ]------------<br>
kernel BUG at mm/slab.c:3002!<br>Oops: Exception in kernel mode, sig: 5 [#3]<br>PREEMPT LTT NESTING LEVEL : 0<br>Xilinx Virtex440<br>Modules linked in: nls_iso8859_1 nfsd<br>NIP: c00a1e94 LR: c00a1d3c CTR: 00000009<br>REGS: ce837d20 TRAP: 0700 Tainted: G D (2.6.29.6.xilinx-ml507.0908010910-ipsec)<br>
MSR: 00021000 <ME,CE> CR: 22424428 XER: 00000005<br>TASK = cfaf5030[970] 'sshd' THREAD: ce836000<br>GPR00: 00000028 ce837dd0 cfaf5030 cf802ea8 cf9e001c 00000008 cf9e0000 ffffffff<br>GPR08: 00000ea0 00000001 00000008 00000028 cf802ea0 100639ac c0547bd0 c0547bd4<br>
GPR16: c0547ba0 c050dd78 c050e60c 000000d0 00000000 00200200 00100100 00000001<br>GPR24: ce836034 ce836000 00000000 c0520000 00000000 cf802eb0 cf807560 cf809e00<br>NIP [c00a1e94] cache_alloc_refill+0x138/0x630<br>LR [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>
Call Trace:<br>[ce837dd0] [c050e60c] 0xc050e60c (unreliable)<br>[ce837e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce837e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce837e70] [c005382c] copy_creds+0xa0/0x12c<br>[ce837e80] [c00307dc] copy_process+0x1c0/0xe20<br>
[ce837ee0] [c00314b8] do_fork+0x7c/0x338<br>[ce837f20] [c00065b4] sys_clone+0x58/0x88<br>[ce837f40] [c000e164] ret_from_syscall+0x0/0x3c<br>Instruction dump:<br>2f8a0000 3bac0010 386c0008 409d0104 80cc0000 7f8c3000 419e00e8 81660010<br>
801e001c 7d205810 39200000 7d294914 <0f090000> 7f8b0040 7d455378 409c0074<br>---[ end trace b098f3001b42033a ]---<br>note: sshd[970] exited with preempt_count 1<br>------------[ cut here ]------------<br>Badness at kernel/softirq.c:150<br>
NIP: c0038e30 LR: c039ba74 CTR: c037667c<br>REGS: ce837a00 TRAP: 0700 Tainted: G D (2.6.29.6.ml507.0908010910-ipsec)<br>MSR: 00021000 <ME,CE> CR: 22424442 XER: 20000005<br>TASK = cfaf5030[970] 'sshd' THREAD: ce836000<br>
GPR00: 00000001 ce837ab0 cfaf5030 cf389760 cf3e0ca0 00000000 00000000 00000000<br>GPR08: 00001b22 c0522ca0 cf4114c8 00000000 82424448 100639ac c0547bd0 c0547bd4<br>GPR16: c0547ba0 c050dd78 c050e60c 000000d0 00000000 00200200 00100100 00000001<br>
GPR24: ce836034 00000005 cf389760 cf389b80 cf4bfd94 ce836000 00000000 ce836000<br>NIP [c0038e30] local_bh_enable+0x9c/0xbc<br>LR [c039ba74] ipv6_sock_mc_close+0x160/0x190<br>Call Trace:<br>[ce837ab0] [c0148aa8] __put_nfs_open_context+0xa8/0xc4 (unreliable)<br>
[ce837ac0] [c039ba74] ipv6_sock_mc_close+0x160/0x190<br>[ce837af0] [c03766a8] inet6_release+0x2c/0x50<br>[ce837b00] [c02f0be4] sock_release+0x30/0xd0<br>[ce837b20] [c02f0ca0] sock_close+0x1c/0x40<br>[ce837b30] [c00a8588] __fput+0xc4/0x204<br>
[ce837b50] [c00a4524] filp_close+0x6c/0xa0<br>[ce837b70] [c0034364] put_files_struct+0xe0/0xfc<br>[ce837b90] [c0035e28] do_exit+0x144/0x6b8<br>[ce837be0] [c000c234] die+0x1b0/0x1b8<br>[ce837c10] [c000c554] _exception+0x1d4/0x2b4<br>
[ce837d10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce837dd0] [c050e60c] 0xc050e60c<br>[ce837e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce837e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce837e70] [c005382c] copy_creds+0xa0/0x12c<br>
[ce837e80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce837ee0] [c00314b8] do_fork+0x7c/0x338<br>[ce837f20] [c00065b4] sys_clone+0x58/0x88<br>[ce837f40] [c000e164] ret_from_syscall+0x0/0x3c<br>Instruction dump:<br>41a20008 4839c591 80010014 83e1000c 38210010 7c0803a6 4e800020 3d20c052<br>
39292ca0 800900c0 7c000034 5400d97e <0f000000> 2f800000 41beff88 38000001<br>BUG: scheduling while atomic: sshd/970/0x10000002<br>Modules linked in: nls_iso8859_1 nfsd<br>Call Trace:<br>[ce837ac0] [c0006184] show_stack+0x40/0x15c (unreliable)<br>
[ce837af0] [c002bab4] __schedule_bug+0x68/0x6c<br>[ce837b00] [c03d5138] schedule+0x2bc/0x36c<br>[ce837b50] [c002bae0] __cond_resched+0x28/0x54<br>[ce837b60] [c03d5304] _cond_resched+0x50/0x58<br>[ce837b70] [c0034368] put_files_struct+0xe4/0xfc<br>
[ce837b90] [c0035e28] do_exit+0x144/0x6b8<br>[ce837be0] [c000c234] die+0x1b0/0x1b8<br>[ce837c10] [c000c554] _exception+0x1d4/0x2b4<br>[ce837d10] [c000e78c] ret_from_except_full+0x0/0x4c<br>[ce837dd0] [c050e60c] 0xc050e60c<br>
[ce837e30] [c00a1d3c] kmem_cache_alloc+0x80/0xa0<br>[ce837e50] [c00534ec] prepare_creds+0x3c/0xcc<br>[ce837e70] [c005382c] copy_creds+0xa0/0x12c<br>[ce837e80] [c00307dc] copy_process+0x1c0/0xe20<br>[ce837ee0] [c00314b8] do_fork+0x7c/0x338<br>
[ce837f20] [c00065b4] sys_clone+0x58/0x88<br>[ce837f40] [c000e164] ret_from_syscall+0x0/0x3c<br><br>root@inson:~#<br><br>Any Clue or any bugs found in mm/slab.c for linux-2.6.29.6 while running IPSEC applications ?<br></pre>
Thanks in Advance !<br><br><br>Regards<br>Srikanth Krishnakar<br>**********************<br>