Author: rmacklem Date: Wed Dec 2 21:48:34 2015 New Revision: 291655 URL: https://svnweb.freebsd.org/changeset/base/291655
Log: MFC: r291035 The problem report was for a crash that happened when smbfs was trying to do a mount. Given the backtrace, it appears that the crash occurred when smb_vc_create() failed and then called smb_vc_put() with vcp->vc_iod == NULL. smb_vc_put() subsequently called smb_vc_disconnect() with vcp->vc_iod == NULL, causing the crash. This patch adds a check for vcp->vc_iod != NULL in smb_vc_disconnect() to avoid the crash. It also fixes the case in smb_vc_create() where kproc_create() fails so that it destroys the mutexes and sets vcp->vc_iod == NULL before free()'ing the iod structure. Modified: stable/10/sys/netsmb/smb_conn.c stable/10/sys/netsmb/smb_iod.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/netsmb/smb_conn.c ============================================================================== --- stable/10/sys/netsmb/smb_conn.c Wed Dec 2 20:22:50 2015 (r291654) +++ stable/10/sys/netsmb/smb_conn.c Wed Dec 2 21:48:34 2015 (r291655) @@ -683,7 +683,9 @@ int smb_vc_disconnect(struct smb_vc *vcp) { - smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); + if (vcp->vc_iod != NULL) + smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | + SMBIOD_EV_SYNC, NULL); return 0; } Modified: stable/10/sys/netsmb/smb_iod.c ============================================================================== --- stable/10/sys/netsmb/smb_iod.c Wed Dec 2 20:22:50 2015 (r291654) +++ stable/10/sys/netsmb/smb_iod.c Wed Dec 2 21:48:34 2015 (r291655) @@ -690,6 +690,9 @@ smb_iod_create(struct smb_vc *vcp) RFNOWAIT, 0, "smbiod%d", iod->iod_id); if (error) { SMBERROR("can't start smbiod: %d", error); + vcp->vc_iod = NULL; + smb_sl_destroy(&iod->iod_rqlock); + smb_sl_destroy(&iod->iod_evlock); free(iod, M_SMBIOD); return error; } _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"