diff options
Diffstat (limited to 'sys/kern/kern_ktrace.c')
| -rw-r--r-- | sys/kern/kern_ktrace.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/kern/kern_ktrace.c b/sys/kern/kern_ktrace.c index db44873..6fc46d6 100644 --- a/sys/kern/kern_ktrace.c +++ b/sys/kern/kern_ktrace.c @@ -350,16 +350,24 @@ ktrace(td, uap) /* * by process group */ + PGRPSESS_SLOCK(); pg = pgfind(-uap->pid); if (pg == NULL) { + PGRPSESS_SUNLOCK(); error = ESRCH; goto done; } + /* + * ktrops() may call vrele(). Lock pg_members + * by the pgrpsess_lock rather than pg_mtx. + */ + PGRP_UNLOCK(pg); LIST_FOREACH(p, &pg->pg_members, p_pglist) if (descend) ret |= ktrsetchildren(curp, p, ops, facs, vp); else ret |= ktrops(curp, p, ops, facs, vp); + PGRPSESS_SUNLOCK(); } else { /* * by pid |
