Date: Wed, 29 Mar 2017 15:41:14 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r316144 - stable/10/sys/dev/isp Message-ID: <201703291541.v2TFfEmA043777@repo.freebsd.org>
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Author: mav Date: Wed Mar 29 15:41:14 2017 New Revision: 316144 URL: https://svnweb.freebsd.org/changeset/base/316144 Log: MFC r315303: Fix panic when SIM dereferenced before allocation. Modified: stable/10/sys/dev/isp/isp_freebsd.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/isp/isp_freebsd.c ============================================================================== --- stable/10/sys/dev/isp/isp_freebsd.c Wed Mar 29 15:40:45 2017 (r316143) +++ stable/10/sys/dev/isp/isp_freebsd.c Wed Mar 29 15:41:14 2017 (r316144) @@ -362,39 +362,40 @@ isp_detach(ispsoftc_t *isp) static void isp_freeze_loopdown(ispsoftc_t *isp, int chan) { - if (IS_FC(isp)) { - struct isp_fc *fc = ISP_FC_PC(isp, chan); - if (fc->simqfrozen == 0) { - isp_prt(isp, ISP_LOGDEBUG0, - "Chan %d Freeze simq (loopdown)", chan); - fc->simqfrozen = SIMQFRZ_LOOPDOWN; - xpt_hold_boot(); - xpt_freeze_simq(fc->sim, 1); - } else { - isp_prt(isp, ISP_LOGDEBUG0, - "Chan %d Mark simq frozen (loopdown)", chan); - fc->simqfrozen |= SIMQFRZ_LOOPDOWN; - } + struct isp_fc *fc = ISP_FC_PC(isp, chan); + + if (fc->sim == NULL) + return; + if (fc->simqfrozen == 0) { + isp_prt(isp, ISP_LOGDEBUG0, + "Chan %d Freeze simq (loopdown)", chan); + fc->simqfrozen = SIMQFRZ_LOOPDOWN; + xpt_hold_boot(); + xpt_freeze_simq(fc->sim, 1); + } else { + isp_prt(isp, ISP_LOGDEBUG0, + "Chan %d Mark simq frozen (loopdown)", chan); + fc->simqfrozen |= SIMQFRZ_LOOPDOWN; } } static void isp_unfreeze_loopdown(ispsoftc_t *isp, int chan) { - if (IS_FC(isp)) { - struct isp_fc *fc = ISP_FC_PC(isp, chan); - int wasfrozen = fc->simqfrozen & SIMQFRZ_LOOPDOWN; - fc->simqfrozen &= ~SIMQFRZ_LOOPDOWN; - if (wasfrozen && fc->simqfrozen == 0) { - isp_prt(isp, ISP_LOGDEBUG0, - "Chan %d Release simq", chan); - xpt_release_simq(fc->sim, 1); - xpt_release_boot(); - } + struct isp_fc *fc = ISP_FC_PC(isp, chan); + + if (fc->sim == NULL) + return; + int wasfrozen = fc->simqfrozen & SIMQFRZ_LOOPDOWN; + fc->simqfrozen &= ~SIMQFRZ_LOOPDOWN; + if (wasfrozen && fc->simqfrozen == 0) { + isp_prt(isp, ISP_LOGDEBUG0, + "Chan %d Release simq", chan); + xpt_release_simq(fc->sim, 1); + xpt_release_boot(); } } - static int ispioctl(struct cdev *dev, u_long c, caddr_t addr, int flags, struct thread *td) {
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