Re: [BProc] related oops in 2.4.17 and 2.4.19

[Nicholas H. <he...@se...>]

After upgrading to 2.4.18, the machines are staying alive after the oops, so I
have gotten a decent ksymoops of the problem.  It looks to be a definate bproc
issue --a bproc_hook_proc_ppid is where it traced the error to. If there is
anything I can do to get more info on this oops, the machine is still up and
working.

Nic

Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000010
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: f898cf27
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: *pde = 00000000
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Oops: 0000
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: CPU:    1
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: EIP:    0010:[<f898cf27>]    Not tainted
Using defaults from ksymoops -t elf32-i386
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: EFLAGS: 00010202
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: eax: 00000000   ebx: 00000000   ecx: 00000002   edx: f6eea000
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: esi: f6eea000   edi: 00000000   ebp: ffffffff   esp: f6ebfe8c
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: ds: 0018   es: 0018   ss: 0018
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Process ps (pid: 15061, stackpage=f6ebf000)
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Stack: c015c965 f6eea000 000002ca 000002ca 00000000 ffffffff 00000004 0000003e
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel:        0000027a 000000d7 00000217 00000000 00000000 00000005 00000001 00000000
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel:        00000000 00000000 00000000 0003eabf 00000000 00000000 ffffffff 00000000
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Call Trace: [proc_pid_stat+629/752] [do_exit+596/624] [proc_info_read+99/288] [sys_read+150/288] [system_call+51/56]
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Call Trace: [<c015c965>] [<c011d054>] [<c015a593>] [<c013b1f6>] [<c010734b>]
Sep 27 10:38:59 node40.io.liniac.upenn.edu kernel: Code: 8b 40 10 c3 90 8b 82 94 00 00 00 8b 40 7c c3 89 f6 f6 05 00
Error (Oops_bfd_perror): scan_arch for specified architecture Success

>>EIP; f898cf27 <[bproc]bproc_hook_proc_ppid+57/68>   <=====
Trace; c015c965 <proc_pid_stat+275/2f0>
Trace; c011d054 <do_exit+254/270>
Trace; c015a593 <proc_info_read+63/120>
Trace; c013b1f6 <sys_read+96/120>
Trace; c010734b <system_call+33/38>
Code;  f898cf27 <[bproc]bproc_hook_proc_ppid+57/68>
00000000 <_EIP>:
Code;  f898cf27 <[bproc]bproc_hook_proc_ppid+57/68>   <=====
   0:   8b 40 10                  mov    0x10(%eax),%eax   <=====
Code;  f898cf2a <[bproc]bproc_hook_proc_ppid+5a/68>
   3:   c3                        ret
Code;  f898cf2b <[bproc]bproc_hook_proc_ppid+5b/68>
   4:   90                        nop
Code;  f898cf2c <[bproc]bproc_hook_proc_ppid+5c/68>
   5:   8b 82 94 00 00 00         mov    0x94(%edx),%eax
Code;  f898cf32 <[bproc]bproc_hook_proc_ppid+62/68>
   b:   8b 40 7c                  mov    0x7c(%eax),%eax
Code;  f898cf35 <[bproc]bproc_hook_proc_ppid+65/68>
   e:   c3                        ret
Code;  f898cf36 <[bproc]bproc_hook_proc_ppid+66/68>
   f:   89 f6                     mov    %esi,%esi
Code;  f898cf38 <[bproc]bproc_hook_proc1+0/80>
  11:   f6 05 00 00 00 00 00      testb  $0x0,0x0

-- 
Nicholas Henke
Linux cluster system programmer
University of Pennsylvania