On Wed, Feb 22, 2012 at 10:01:53AM +0900, Jun'ichi Nomura wrote: > Since 2.6.39 (1196f8b), when a driver returns -ENOMEDIUM for open(), > __blkdev_get() calls rescan_partitions() to remove > in-kernel partition structures and raise KOBJ_CHANGE uevent. > > However it ends up calling driver's revalidate_disk without open > and could cause oops. > > In the case of SCSI: > > process A process B > ---------------------------------------------- > sys_open > __blkdev_get > sd_open > returns -ENOMEDIUM > scsi_remove_device > <scsi_device torn down> > rescan_partitions > sd_revalidate_disk > <oops> > > Oopses are reported here: > http://marc.info/?l=linux-scsi&m=132388619710052 > > This patch separates the partition invalidation from rescan_partitions() > and use it for -ENOMEDIUM case. > > Reported-by: Huajun Li <huajun.li.lee@xxxxxxxxx> > Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> Acked-by: Tejun Heo <tj@xxxxxxxxxx> Thank you! -- tejun -- 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
