On Sat, 2013-07-13 at 13:35:10 +0000, Alexander Motin wrote: > Author: mav > Date: Sat Jul 13 13:35:09 2013 > New Revision: 253322 > URL: http://svnweb.freebsd.org/changeset/base/253322 > > Log: > Improve handling of 0x3F/0x0E "Reported LUNs data has changed" and 0x25/0x00 > "Logical unit not supported" errors. First initiates specific target > rescan, > second -- destroys specific LUN. That allows to automatically detect > changes > in list of device LUNs. This mechanism doesn't work when target is > completely > idle, but probably that is all what can be done without active polling. > > Reviewed by: ken > Sponsored by: iXsystems, Inc. > > Modified: > head/sys/cam/cam_periph.c > head/sys/cam/scsi/scsi_all.c > head/sys/cam/scsi/scsi_all.h > > Modified: head/sys/cam/cam_periph.c > ============================================================================== > @@ -1761,12 +1759,25 @@ cam_periph_error(union ccb *ccb, cam_fla > xpt_async(AC_LOST_DEVICE, newpath, NULL); > xpt_free_path(newpath); > } > + } > > /* Broadcast UNIT ATTENTIONs to all periphs. */ > - } else if (scsi_extract_sense_ccb(ccb, > - &error_code, &sense_key, &asc, &ascq) && > - sense_key == SSD_KEY_UNIT_ATTENTION) { > + if ((action & SSQ_UA) != 0) > xpt_async(AC_UNIT_ATTENTION, orig_ccb->ccb_h.path, orig_ccb); > + > + /* Rescan target on "Reported LUNs data has changed" */ > + if ((action & SSQ_RESCAN) != 0) { > + if (xpt_create_path(&newpath, NULL, > + xpt_path_path_id(ccb->ccb_h.path), > + xpt_path_target_id(ccb->ccb_h.path), > + -1) == CAM_REQ_CMP) { > + > + scan_ccb = xpt_alloc_ccb_nowait(); > + scan_ccb->ccb_h.path = newpath; > + scan_ccb->ccb_h.func_CODe = XPT_SCAN_BUS; > + scan_ccb->crcn.flags = 0; > + xpt_rescan(scan_ccb); > + } > } > > /* Attempt a retry */ >
This introduces a possible NULL dereference. xpt_alloc_ccb_nowait() may return NULL. Coverity reports that this is checked for NULL returns 31 out of 36 times. Please grep over the tree and fix this plus the other 4 locations where this is not being null-checked. Thanks! This has no CID yet (they run a background check that merges and assigns CIDs, and this is a fresh run ...) _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
