Linux-kernel mailing list archive 1999-36,: Re: Kernel 2.2.12 oops (swaper - cyclades - ppp)

# Re: Kernel 2.2.12 oops (swaper - cyclades - ppp)

Adam Donnison (adam@saki.com.au)
Thu, 09 Sep 1999 21:40:37 +1000

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I've seen almost identical oops in the kernel, although I am using
a specialix board with a driver from BitWizard. Given this I suspect
the problem may be a little lower than the board-level driver. This
was seen in 2.2.10 with ppp - usually when I try to kill off a ppp
connection (but not always). The specialix driver doesn't have a
BLOCKMOVE define so I suspect I'll have to either pass this back to
BitWizard or to delve deeper in the code and see if there are similar
optimizations.

I was actually about to upgrade to 2.2.12 in the hope that this would
sort the problem out, but given the similarity I will do a little
more digging.

Maybe this may clarify the problem for those on the list with more
of an in-depth knowledge than I.

Adam

"Rodel T. Viado" wrote:
>
> I have experienced oops like this using the newest driver provided by
> cyclades (also in 2.2.12). Check if you are also encountering high TX
> errors(use ifconfig), if the answer is yes then most probably
> there is a bug in the optimization BLOCKMOVE routine. Talked to ivan about
> this and he suggested to undef it in cyclades.c. Undefining BLOCKMOVE and
> recompiling made my kernel stable as a rock (no more oops and TX errors.)
>
> hope this helps,
>
> Rodel
> On Fri, 3 Sep 1999, Catalin BOIE wrote:
>
> > Hi, guys!
> >
> > System is a Intel Pentium II/333 SMP, kernel 2.2.12, ppp-2.3.9.
> > I got the following oops:
> >
> > ksymoops 0.7b on i686 2.2.12. Options used
> > -V (default)
> > -k /proc/ksyms (default)
> > -l /proc/modules (default)
> > -o /lib/modules/2.2.12/ (default)
> > -m /boot/System.map (specified)
> >
> > Warning (compare_ksyms_lsmod): module bsd_comp is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_cuseeme is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_ftp is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_irc is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_quake is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_raudio is in lsmod but not in ksyms, probably no symbols exported
> > Warning (compare_ksyms_lsmod): module ip_masq_vdolive is in lsmod but not in ksyms, probably no symbols exported
> > Unable to handle kernel NULL pointer dereference at virtual address 00000070
> > current->tss.cr3 = 038c0000, %cr3 = 038c0000
> > *pde = 00000000
> > Oops: 0002
> > CPU: 0
> > EIP: 0010:[<cc8531e9>]
> > Using defaults from ksymoops -t elf32-i386 -a i386
> > EFLAGS: 00010286
> > eax: 00000070 ebx: 0000003d ecx: 0000001d edx: 00000000
> > esi: c19ce65f edi: 0000001e ebp: c19ce400 esp: c11ebf50
> > ds: 0018 es: 0018 ss: 0018
> > Process swapper (pid: 0, process nr: 0, stackpage=c0203000)
> > Stack: c1808000 00000000 00000001 c4351740 c19ce72b 0000001e ffff1d69 cc852f28
> > c19ce400 c19ce400 c1808000 00000000 bffffe1c cc852b3f c19ce400 cc83135c
> > c1808000 cc82915a c1808000 00000000 c022bab8 cc8290c6 cc83135c 00000001
> > Call Trace: [<cc852f28>] [<cc852b3f>] [<cc83135c>] [<cc82915a>] [<cc8290c6>] [<cc83135c>] [<c011af4d>]
> > [<c0109405>]
> > Code: f0 ff 4a 70 0f 94 c0 84 c0 74 09 52 e8 c2 ae 8f f3 83 c4 04
> >
> > >>EIP; cc8531e9 <[ppp]ppp_async_encode+241/288> <=====
> > Trace; cc852f28 <[ppp]ppp_tty_push+100/180>
> > Trace; cc852b3f <[ppp]ppp_tty_wakeup+5f/74>
> > Trace; cc83135c <[cyclades]cleanup_module+1478/1f168>
> > Trace; cc82915a <[cyclades]do_softint+8a/c0>
> > Trace; cc8290c6 <[cyclades]do_cyclades_bh+56/60>
> > Trace; cc83135c <[cyclades]cleanup_module+1478/1f168>
> > Trace; c011af4d <do_bottom_half+85/a8>
> > Trace; c0109405 <handle_bottom_half+5/10>
> > Code; cc8531e9 <[ppp]ppp_async_encode+241/288>
> > 00000000 <_EIP>:
> > Code; cc8531e9 <[ppp]ppp_async_encode+241/288> <=====
> > 0: f0 ff 4a 70 lock decl 0x70(%edx) <=====
> > Code; cc8531ed <[ppp]ppp_async_encode+245/288>
> > 4: 0f 94 c0 sete %al
> > Code; cc8531f0 <[ppp]ppp_async_encode+248/288>
> > 7: 84 c0 testb %al,%al
> > Code; cc8531f2 <[ppp]ppp_async_encode+24a/288>
> > 9: 74 09 je 14 <_EIP+0x14> cc8531fd <[ppp]ppp_async_encode+255/288>
> > Code; cc8531f4 <[ppp]ppp_async_encode+24c/288>
> > b: 52 pushl %edx
> > Code; cc8531f5 <[ppp]ppp_async_encode+24d/288>
> > c: e8 c2 ae 8f f3 call f38faed3 <_EIP+0xf38faed3> c014e0bc <__kfree_skb+0/ac>
> > Code; cc8531fa <[ppp]ppp_async_encode+252/288>
> > 11: 83 c4 04 addl $0x4,%esp
> >
> > Aiee, killing interrupt handler
> > Kernel panic: Attempted to kill the idle task!
> > In swapper task - not syncing
> >
> > 7 warnings issued. Results may not be reliable.
> >
> > What is the problem?
> >
> > Catalin(ux) BOIE

    --
    Adam Donnison                                  email: adam@saki.com.au
    Saki Computer Services Pty. Ltd.
    93 Kallista-Emerald Road                        phone: +61 3 9752 1512
    THE PATCH  VIC 3792    AUSTRALIA                fax:   +61 3 9752 1098

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