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SubjectCrash with 2.0.37-ac8
Probably a cheap one, but I'm too tired to debug myself.

This is from a router with a DX486-33 running 2.0.37-ac8, libc5 system
with a NE2000 ethernet board and gated-3.5.7. Due to unfortunate
circumstances I had to shutdown the network (the system was once upon
a time RH-4.2 based, so there are still the necessary mechanisms) and
after that (so the eth0 if was already gone) the gated. Gated is using
OSPF and multicasting for its announces (this is IMHO important
because the crash occured in a kernel path which is related to
multicasting.

--- cut ---
Unable to handle kernel paging request at virtual address c1811410
current->tss.cr3 = 00101000, 8r3 = 00101000
*pde = 0009e067
*pte = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[ip_mc_dec_group+14/116]
EFLAGS: 00010206
eax: 0181139c ebx: 00000013 ecx: 050000e0 edx: 0181139c
esi: 01811410 edi: 00792e90 ebp: 00000001 esp: 00935ef8
ds: 0018 es: 0018 fs: 002b gs: 002b ss: 0018
Process gated (pid: 269, process nr: 17, stackpage=00935000)
Stack: 00000013 00e37018 00792e90 0015668f 0181139c 050000e0 00e37018 00792e90
00155018 00e37018 00e37018 00792e00 00000000 0013899f 00792e90 00000000
00792e00 00792e00 00792e00 00000001 00138bd0 00792e90 0008d0cc 00123750
Call Trace: [ip_mc_drop_socket+43/96]
[ne:ne_probe+5016/3172]
[inet_release+28/112]
[sock_release+91/156]
[sock_close+36/44]
[__fput+28/64]
[close_fp+76/92]
[do_exit+288/504]
[do_signal+547/632]
[signal_return+18/56]
Code: 83 78 74 00 74 59 8b 16 39 4a 04 75 49 8b 42 24 8d 78 ff 89

Looks to me that gated closes its multicast socket and the kernel
tries to remove a filter from a no longer existing network device.
Probably only a check missing.

Kind regards
Henning

--
Dipl.-Inf. (Univ.) Henning P. Schmiedehausen -- hps@tanstaafl.de
TANSTAAFL! Consulting - Unix, Internet, Security

Hutweide 15 Fon.: 09131 / 50654-0 "There ain't no such
D-91054 Buckenhof Fax.: 09131 / 50654-20 thing as a free Linux"

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