On 10/26/2011 08:29 PM, Moger, Babu wrote: > This patch validates sdev pointer in scsi_dh_activate before proceeding further. > > Without this check we might see the panic as below. I have seen this > panic multiple times.. > > Call trace: > > #0 [ffff88007d647b50] machine_kexec at ffffffff81020902 > #1 [ffff88007d647ba0] crash_kexec at ffffffff810875b0 > #2 [ffff88007d647c70] oops_end at ffffffff8139c650 > #3 [ffff88007d647c90] __bad_area_nosemaphore at ffffffff8102dd15 > #4 [ffff88007d647d50] page_fault at ffffffff8139b8cf > [exception RIP: scsi_dh_activate+0x82] > RIP: ffffffffa0041922 RSP: ffff88007d647e00 RFLAGS: 00010046 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000000093c5 > RDX: 00000000000093c5 RSI: ffffffffa02e6640 RDI: ffff88007cc88988 > RBP: 000000000000000f R8: ffff88007d646000 R9: 0000000000000000 > R10: ffff880082293790 R11: 00000000ffffffff R12: ffff88007cc88988 > R13: 0000000000000000 R14: 0000000000000286 R15: ffff880037b845e0 > ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000 > #5 [ffff88007d647e38] run_workqueue at ffffffff81060268 > #6 [ffff88007d647e78] worker_thread at ffffffff81060386 > #7 [ffff88007d647ee8] kthread at ffffffff81064436 > #8 [ffff88007d647f48] kernel_thread at ffffffff81003fba > > Signed-off-by: Babu Moger <babu.moger@xxxxxxxxxx> Acked-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Markus Rex, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
