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Avoid NULL pointer dereference, for a process which is not (yet) a

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member of a process group, e.g. during the system bootstrap.

Submitted by:	Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2016-04-15 09:13:01 +00:00
parent 8310528673
commit 16952e289f
1 changed files with 2 additions and 1 deletions
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3
sys/ddb/db_ps.c
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@ -184,7 +184,8 @@ db_ps(db_expr_t addr, bool hasaddr, db_expr_t count, char *modif)
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)