Messages in this thread Patch in this message |  | | Date | Tue, 14 Jan 2003 15:53:26 -0600 (CST) | From | Patrick Mochel <> | Subject | Re: 2.5.58 Oops when booting from initrd - kobject_del |
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On Tue, 14 Jan 2003 Valdis.Kletnieks@vt.edu wrote:
> On Tue, 14 Jan 2003 02:47:40 MST, "Ivan G." <ivangurdiev@attbi.com> said: > > Kernel: 2.5.58 (everything but the tag changeset) > > > > My attempt to boot an initrd resulted in the following oops: > > (scribbled down important parts) > > ======================================================= > > unable to handle kernel NULL pointer at virtual address 00000064 > > > Call Trace: > > ========== > > kobject_del+0x13/0x30 > > kobject_unregister+0x13/0x30 > > elv_unregister_queue+0x1c/0x30 > > unlink_gendisk+0x13/0x40 > > del_gendisk+0x80/0x140 > > initrd_release+0x4e/0x90 > > __fput+0xf1/0x100 > > filp_close+0x74/0xa0 > > sys_close+0x62/0xa0 > > syscall_call+0x7/0xb > > prepare_namespace+0x13a/0x1b0 > > init+0x3a/0x160 > > init+0x0/0x160 > > kernel_thread_helper+0x5/0x18 > > ... > > Code: 8b 70 28 85 f6 0f 84 1e 01 00 00 8b 06 85 c0 75 08 0f 0b 02
Could you please try the following patch and see if it fixes the problem?
Thanks,
-pat
===== drivers/block/elevator.c 1.36 vs edited ===== --- 1.36/drivers/block/elevator.c Sun Jan 12 08:10:40 2003 +++ edited/drivers/block/elevator.c Tue Jan 14 15:46:00 2003 @@ -431,10 +431,13 @@ void elv_unregister_queue(struct gendisk *disk) { request_queue_t *q = disk->queue; - elevator_t *e = &q->elevator; + elevator_t *e; - kobject_unregister(&e->kobj); - kobject_put(&disk->kobj); + if (q) { + e = &q->elevator; + kobject_unregister(&e->kobj); + kobject_put(&disk->kobj); + } } elevator_t elevator_noop = {
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