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Subjectkernel oops, 2.4.19
A while back I described some weird kernel oopses I was getting with 
the Red Hat version of 2.4.18; a few people said that it could be due
to Red Hat changes, and that I should try a kernel. Well,
I finally did -- downloaded 2.4.19 from yesterday, compiled
and booted it, and today my X server got shot down with a
similar-looking syslog entry (which follows.)

I've checked my RAM with memtest86 3.0 with no errors.

Details on the machine config and the previous crashes I had with
RH's 2.4.18-3 and 2.4.18-5 are here:

I managed to run "top" on another terminal after X had hung, but
before it had died (or at least, before the screen cleared) and it

10:59pm up 1 day, 3:22, 1 user, load average: 3.98, 2.19, 1.45
78 processes: 68 sleeping, 7 running, 0 zombie, 3 stopped
CPU states: 16.3% user, 2.1% system, 3.0% nice, 34.8% idle
Mem: 321588K av, 289888K used, 31700K free, 0K shrd, 15564K buff
Swap: 369380K av, 11136K used, 358244K free 223164K cached

so it doesn't look like memory was a problem.

Here's the latest oops. Any suggestions?

Jamie Zawinski


ksymoops 2.4.4 on i686 2.4.19. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19/ (default)
-m /boot/ (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.

Sep 17 22:58:09 gronk kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000014
Sep 17 22:58:09 gronk kernel: c01fcd45
Sep 17 22:58:09 gronk kernel: *pde = 00000000
Sep 17 22:58:09 gronk kernel: Oops: 0000
Sep 17 22:58:09 gronk kernel: CPU: 0
Sep 17 22:58:09 gronk kernel: EIP: 0010:[<c01fcd45>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
Sep 17 22:58:09 gronk kernel: EFLAGS: 00013206
Sep 17 22:58:09 gronk kernel: eax: 00000014 ebx: c01c0ec0 ecx: 00000000 edx: 00000014
Sep 17 22:58:09 gronk kernel: esi: cfb8bf08 edi: cfb8bf14 ebp: cb6568a0 esp: cfb8be78
Sep 17 22:58:09 gronk kernel: ds: 0018 es: 0018 ss: 0018
Sep 17 22:58:09 gronk kernel: Process X (pid: 975, stackpage=cfb8b000)
Sep 17 22:58:09 gronk kernel: Stack: cfb8bf08 00000014 c01fd939 cfb8bf08 cb6568a0 cd9b7634 cb6568a0 00000001
Sep 17 22:58:13 gronk kernel: 00000000 ffffffa1 00000001 0000ef00 00000000 cd9b75e0 00000001 d01b55a0
Sep 17 22:58:29 gronk kernel: d073a260 c0125478 cfb8bf08 0003ef4c cfb8bf1c c34dd5c0 c01becc1 c34dd5c0
Sep 17 22:58:41 gronk kernel: Call Trace: [<c01fd939>] [<c0125478>] [<c01becc1>] [<c01143da>] [<c01bedc8>]
Sep 17 22:58:42 gronk kernel: [<c0142562>] [<c0134976>] [<c010891b>]
Sep 17 22:58:43 gronk kernel: Code: 8b 18 4b 78 26 eb 14 8d 74 26 00 8b 46 0c 8d b6 00 00 00 00

>>EIP; c01fcd45 <unix_detach_fds+25/60> <=====
Trace; c01fd939 <unix_stream_recvmsg+2d9/3a0>
Trace; c0125478 <handle_mm_fault+58/c0>
Trace; c01becc1 <sock_recvmsg+31/b0>
Trace; c01143da <do_page_fault+18a/4cb>
Trace; c01bedc8 <sock_read+88/a0>
Trace; c0142562 <sys_select+472/480>
Trace; c0134976 <sys_read+96/f0>
Trace; c010891b <system_call+33/38>
Code; c01fcd45 <unix_detach_fds+25/60>
00000000 <_EIP>:
Code; c01fcd45 <unix_detach_fds+25/60> <=====
0: 8b 18 mov (%eax),%ebx <=====
Code; c01fcd47 <unix_detach_fds+27/60>
2: 4b dec %ebx
Code; c01fcd48 <unix_detach_fds+28/60>
3: 78 26 js 2b <_EIP+0x2b> c01fcd70 <unix_detach_fds+50/60>
Code; c01fcd4a <unix_detach_fds+2a/60>
5: eb 14 jmp 1b <_EIP+0x1b> c01fcd60 <unix_detach_fds+40/60>
Code; c01fcd4c <unix_detach_fds+2c/60>
7: 8d 74 26 00 lea 0x0(%esi,1),%esi
Code; c01fcd50 <unix_detach_fds+30/60>
b: 8b 46 0c mov 0xc(%esi),%eax
Code; c01fcd53 <unix_detach_fds+33/60>
e: 8d b6 00 00 00 00 lea 0x0(%esi),%esi

1 warning issued. Results may not be reliable.
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