Messages in this thread | | | Date | Thu, 27 Mar 2003 20:59:12 -0800 | From | Andrew Morton <> | Subject | Re: 2.5.66-mm1 |
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Ed Tomlinson <tomlins@cam.org> wrote: > > Hi Andrew, > > Got this opps after about 20 hours with mm1 (65-mm3 lasted 5 days > until I rebooted). > > Unable to handle kernel NULL pointer dereference at virtual address 00000000 > printing eip: > c011516d > *pde = 00000000 > Oops: 0002 [#1] > CPU: 0 > EIP: 0060:[<c011516d>] Not tainted VLI > EFLAGS: 00010097 > EIP is at schedule+0x8d/0x3a0 > eax: 00000001 ebx: cf5e99c0 ecx: cf5e99c0 edx: ffffffff > esi: 00000000 edi: c031de00 ebp: cf5ebf08 esp: cf5ebef0 > ds: 007b es: 007b ss: 0068 > Process newsplex (pid: 1205, threadinfo=cf5ea000 task=cf5e99c0) > Stack: c011fbd7 c02bbc40 00000246 05261e41 cf5ebf14 cf5ebf50 cf5ebf3c c0120754 > cf5ebf14 c02bc538 c02bc538 05261e41 4b87ad6e c01206e0 cf5e99c0 c02bbc40 > c015abd6 000007d1 00000000 cf5ebf60 c015ac19 cf5ea000 cf5ea000 00000000 > Call Trace: > [<c011fbd7>] add_timer+0x57/0xa0 > [<c0120754>] schedule_timeout+0x54/0xa0 > [<c01206e0>] process_timeout+0x0/0x20 > [<c015abd6>] do_poll+0x56/0xc0 > [<c015ac19>] do_poll+0x99/0xc0 > [<c015ad88>] sys_poll+0x148/0x220 > [<c013eb3b>] sys_mprotect+0x21b/0x22f > [<c01079ec>] sys_clone+0x2c/0x60 > [<c015a200>] __pollwait+0x0/0xc0 > [<c0109277>] syscall_call+0x7/0xb > > Code: 40 17 04 75 4d 8b 03 85 c0 74 47 48 0f 84 da 02 00 00 ff 0d 00 de 31 c0 8b 43 68 ff 08 8b 03 83 f8 02 0f 84 b6 02 00 00 8b 73 28 <ff> 4e 00 8b 53 24 8b 43 20 89 50 04 89 02 8b 4b 18 8d 14 ce 8d
That longer Code: line is really handy.
You died in schedule()->deactivate_task()->dequeue_task().
static inline void dequeue_task(struct task_struct *p, prio_array_t *array) { array->nr_active--;
`array' is zero.
I'm going to Cc Ingo and run away. Ed uses preempt. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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