From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.0) Description of problem: While nothing specially was going on, kernel crash and internet connection crashed (at least). How reproducible: Didn't try Additional info: Jun 13 18:45:01 master kernel: printing eip: Jun 13 18:45:01 master kernel: c0145c9f Jun 13 18:45:01 master kernel: pgd entry d3755f38: 0000000000000000 Jun 13 18:45:01 master kernel: pmd entry d3755f38: 0000000000000000 Jun 13 18:45:01 master kernel: ... pmd not present! Jun 13 18:45:01 master kernel: Oops: 0002 Jun 13 18:45:01 master kernel: CPU: 0 Jun 13 18:45:01 master kernel: EIP: 0010:[prune_dcache+191/352] Jun 13 18:45:01 master kernel: EIP: 0010:[<c0145c9f>] Jun 13 18:45:01 master kernel: EFLAGS: 00010282
I saw this happen also on one of my machines also. It happened at the same time syslogd was rotating /var/log/messages. Here are my log entries: Jan 7 04:02:03 20055 syslogd 1.4-0: restart. Jan 7 04:02:23 20055 kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000048 Jan 7 04:02:23 20055 kernel: printing eip: Jan 7 04:02:23 20055 kernel: c013a1a5 Jan 7 04:02:23 20055 kernel: pgd entry c5d81000: 0000000000000000 Jan 7 04:02:23 20055 kernel: pmd entry c5d81000: 0000000000000000 Jan 7 04:02:23 20055 kernel: ... pmd not present! Jan 7 04:02:23 20055 kernel: Oops: 0002 Jan 7 04:02:23 20055 kernel: CPU: 0 Jan 7 04:02:23 20055 kernel: EIP: 0010:[bdput+5/80] Jan 7 04:02:23 20055 kernel: EIP: 0010:[<c013a1a5>] Jan 7 04:02:23 20055 kernel: EFLAGS: 00010202 Jan 7 04:02:23 20055 kernel: eax: 00000040 ebx: 00000040 ecx: c23c8808 edx: 00000000 Jan 7 04:02:23 20055 kernel: esi: c1245f84 edi: 00001cdb ebp: c1245f98 esp: c1245f48 Jan 7 04:02:23 20055 kernel: ds: 0018 es: 0018 ss: 0018 Jan 7 04:02:23 20055 kernel: Process kswapd (pid: 4, stackpage=c1245000) Jan 7 04:02:23 20055 kernel: Stack: c23c8800 c014671b 00000040 c0145f80 c122d0c0 c238f620 c238f620 c23c8800 Jan 7 04:02:23 20055 kernel: c0146778 c23c8800 c289eba8 c289eba0 c01469be c1245f84 000001ec c6942048 Jan 7 04:02:23 20055 kernel: c6e7b428 00010f00 00000004 0000001f 00000004 c0146a05 00000000 c012cba6 Jan 7 04:02:23 20055 kernel: Call Trace: [clear_inode+267/304] [destroy_inode+48/64] [dispose_list+56/96] [prune_icache+254/272] [shrink_icache_memory+53/80] [do_try_to_free_pages+102/128] [kswapd+112/272] Jan 7 04:02:23 20055 kernel: Call Trace: [<c014671b>] [<c0145f80>] [<c0146778>] [<c01469be>] [<c0146a05>] [<c012cba6>] [<c012cc30>] Jan 7 04:02:23 20055 kernel: [empty_bad_page+0/4096] [empty_bad_page+0/4096] [kernel_thread+38/48] [kswapd+0/272] Jan 7 04:02:23 20055 kernel: [<c0105000>] [<c0105000>] [<c0107576>] [<c012cbc0>] Jan 7 04:02:23 20055 kernel: Jan 7 04:02:23 20055 kernel: Code: ff 4b 08 0f 94 c0 84 c0 74 39 8b 43 10 85 c0 74 19 68 d7 01 Jan 7 04:02:31 20055 kernel: kernel BUG at exit.c:465! Jan 7 04:02:31 20055 kernel: invalid operand: 0000 Jan 7 04:02:31 20055 kernel: CPU: 0 Jan 7 04:02:31 20055 kernel: EIP: 0010:[do_exit+560/576] Jan 7 04:02:31 20055 kernel: EIP: 0010:[<c0118cd0>] Jan 7 04:02:31 20055 kernel: EFLAGS: 00010282 Jan 7 04:02:31 20055 kernel: eax: 0000001a ebx: 00000000 ecx: fffffffe edx: 00000000 Jan 7 04:02:31 20055 kernel: esi: c1244000 edi: 0000000b ebp: 00000048 esp: c1245e18 Jan 7 04:02:31 20055 kernel: ds: 0018 es: 0018 ss: 0018 Jan 7 04:02:31 20055 kernel: Process kswapd (pid: 4, stackpage=c1245000) Jan 7 04:02:31 20055 kernel: Stack: c020d3bb c020d512 000001d1 00000048 c0109549 c0205d37 c0205e6d c013a1a5 Jan 7 04:02:31 20055 kernel: 00000002 c020ba40 c011343e 0000000b c1245f14 00000002 c020b9fd 00000048 Jan 7 04:02:31 20055 kernel: c020bad5 c013a1a5 c020bac5 c020baaa 00000048 c12b01c0 c1244000 c1244000 Jan 7 04:02:31 20055 kernel: Call Trace: [error_table+10403/44216] [error_table+10746/44216] [die+57/80] [stext_lock+8919/12768] [stext_lock+9229/12768] [bdput+5/80] [error_table+3880/44216] Jan 7 04:02:31 20055 kernel: Call Trace: [<c020d3bb>] [<c020d512>] [<c0109549>] [<c0205d37>] [<c0205e6d>] [<c013a1a5>] [<c020ba40>] Jan 7 04:02:31 20055 kernel: [do_page_fault+830/1152] [error_table+3813/44216] [error_table+4029/44216] [bdput+5/80] [error_table+4013/44216] [error_table+3986/44216] [batch_entropy_process+165/176] [__run_timers+168/224] Jan 7 04:02:31 20055 kernel: [<c011343e>] [<c020b9fd>] [<c020bad5>] [<c013a1a5>] [<c020bac5>] [<c020baaa>] [<c0174735>] [<c011ccf8>] Jan 7 04:02:31 20055 kernel: [run_all_timers+23/32] [bh_action+28/112] [do_page_fault+0/1152] [error_code+52/64] [bdput+5/80] [clear_inode+267/304] [destroy_inode+48/64] [dispose_list+56/96] Jan 7 04:02:31 20055 kernel: [<c011d2c7>] [<c0119f6c>] [<c0113100>] [<c01090f4>] [<c013a1a5>] [<c014671b>] [<c0145f80>] [<c0146778>] Then the system hung until we rebooted it. Running RH7.1 on a ~865Mhz Pentium III.
the "bdput" one we fixed in 2.4.9-12 (released as erratum for 7.1)
this bug looks like the same as # 53360