Author: kib
Date: Fri Apr 15 09:13:01 2016
New Revision: 298043
URL: https://svnweb.freebsd.org/changeset/base/298043
Log:
Avoid NULL pointer dereference, for a process which is not (yet) a
member of a process group, e.g. during the system bootstrap.
Submitted by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
MFC after: 1 week
Modified:
head/sys/ddb/db_ps.c
Modified: head/sys/ddb/db_ps.c
==============================================================================
--- head/sys/ddb/db_ps.c Fri Apr 15 08:17:55 2016 (r298042)
+++ head/sys/ddb/db_ps.c Fri Apr 15 09:13:01 2016 (r298043)
@@ -184,7 +184,8 @@ db_ps(db_expr_t addr, bool hasaddr, db_e
strlcat(state, "V", sizeof(state));
if (p->p_flag & P_SYSTEM || p->p_lock > 0)
strlcat(state, "L", sizeof(state));
- if (p->p_session != NULL && SESS_LEADER(p))
+ if (p->p_pgrp != NULL && p->p_session != NULL &&
+ SESS_LEADER(p))
strlcat(state, "s", sizeof(state));
/* Cheated here and didn't compare pgid's. */
if (p->p_flag & P_CONTROLT)
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