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Don't attempt to disable enabled fasttrap probes in an exiting process.

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There's no need to do so, and we can't hold an exiting process, so this
race can result in panics.

MFC after:	1 week
This commit is contained in:
Mark Johnston 2015-01-30 05:03:23 +00:00
parent 1eb8ad64ea
commit a70a59ea73
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=277915
1 changed files with 7 additions and 2 deletions
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9
sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
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@ -1296,8 +1296,13 @@ fasttrap_pid_disable(void *arg, dtrace_id_t id, void *parg)
*/
if ((p = pfind(probe->ftp_pid)) != NULL) {
#ifdef __FreeBSD__
_PHOLD(p);
PROC_UNLOCK(p);
if (p->p_flag & P_WEXIT) {
PROC_UNLOCK(p);
p = NULL;
} else {
_PHOLD(p);
PROC_UNLOCK(p);
}
#endif
}