https://bugzilla.kernel.org/show_bug.cgi?id=43085 Summary: BUG: unable to handle kernel NULL pointer dereference (in scsi_send_eh_cmnd) Product: SCSI Drivers Version: 2.5 Kernel Version: 3.4-rc2 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Other AssignedTo: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx ReportedBy: rockorequin@xxxxxxxxxxx Regression: Yes Created an attachment (id=72868) --> (https://bugzilla.kernel.org/attachment.cgi?id=72868) BUG - unable to handle kernel NULL pointer dereference (scsi_send_eh_cmnd) Whenever I plug my USB3 hub into the PC, I encounter this bug (log attached). It stops the PC from booting if the hub is inserted at the time, and crashes USB if I encounter it once the desktop is running. The line where it crashes is in scsi_error.c at line 782: struct scsi_driver *sdrv = scsi_cmd_to_driver(scmd); which expands to: struct scsi_driver *sdrv *(struct scsi_driver **)scmd->request->rq_disk->private_data The issue is that rq_disk is NULL (possibly because it's a USB hub and there isn't necessarily an underlying hard drive?). If I make it check for rq_disk being null before trying to assign sdrv and set sdrv to null accordingly, and then later in the function I check for sdrv being null before looking at sdrv->eh_action, the error goes away and drives on the hub seem to mount and function OK (mostly anyway). -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- 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
