Author: gnn Date: Wed Dec 7 07:27:47 2016 New Revision: 309669 URL: https://svnweb.freebsd.org/changeset/base/309669
Log: 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 MFC after: 2 weeks Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D8718 Modified: head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Wed Dec 7 06:57:08 2016 (r309668) +++ head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Wed Dec 7 07:27:47 2016 (r309669) @@ -4391,8 +4391,8 @@ 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: @@ -4403,8 +4403,8 @@ 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 */ _______________________________________________ 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"
