Date: Tue, 20 Dec 2016 19:30:21 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r310335 - stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace Message-ID: <201612201930.uBKJULsD026350@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: gnn Date: Tue Dec 20 19:30:21 2016 New Revision: 310335 URL: https://svnweb.freebsd.org/changeset/base/310335 Log: MFC: 309669 Fix a kernel panic in DTrace's rw_iswriter subroutine. On FreeBSD the sense of rw_write_held() and rw_iswriter() were reversed, probably due to a cut and paste error. Using rw_iswriter() would cause the kernel to panic. Reviewed by: markj Sponsored by: DARPA, AFRL Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Tue Dec 20 18:47:02 2016 (r310334) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Tue Dec 20 19:30:21 2016 (r310335) @@ -4274,8 +4274,8 @@ dtrace_dif_subr(uint_t subr, uint_t rd, break; } l.lx = dtrace_loadptr(tupregs[0].dttk_value); - LOCK_CLASS(l.li)->lc_owner(l.li, &lowner); - regs[rd] = (lowner == curthread); + regs[rd] = LOCK_CLASS(l.li)->lc_owner(l.li, &lowner) && + lowner != NULL; break; case DIF_SUBR_RW_ISWRITER: @@ -4286,8 +4286,8 @@ dtrace_dif_subr(uint_t subr, uint_t rd, break; } l.lx = dtrace_loadptr(tupregs[0].dttk_value); - regs[rd] = LOCK_CLASS(l.li)->lc_owner(l.li, &lowner) && - lowner != NULL; + LOCK_CLASS(l.li)->lc_owner(l.li, &lowner); + regs[rd] = (lowner == curthread); break; #endif /* illumos */
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201612201930.uBKJULsD026350>