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Do not attempt to write to control clients which have been destroyed,

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reported by Artur Penttinen in GitHub issue 5570.
This commit is contained in:
nicm
2026-09-03 21:35:38 +00:00
committed by tmux update bot
parent a6f9a206b7
commit 93169e2e62
1 changed files with 13 additions and 3 deletions
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16
control.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: control.c,v 1.66 2026/08/18 07:43:44 nicm Exp $ */ /* $OpenBSD: control.c,v 1.67 2026/09/03 21:35:38 nicm Exp $ */
/* /*
* Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com> * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -455,8 +455,12 @@ control_flush_deferred(struct client *c)
void void
control_write(struct client *c, const char *fmt, ...) control_write(struct client *c, const char *fmt, ...)
{ {
va_list ap; struct control_state *cs = c->control_state;
char *line; char *line;
va_list ap;
if (cs == NULL)
return;
va_start(ap, fmt); va_start(ap, fmt);
xvasprintf(&line, fmt, ap); xvasprintf(&line, fmt, ap);
@@ -479,6 +483,9 @@ control_write_guard(struct client *c, const char *guard, long t, u_int number,
struct control_state *cs = c->control_state; struct control_state *cs = c->control_state;
char *line; char *line;
if (cs == NULL)
return;
if (strcmp(guard, "begin") == 0) if (strcmp(guard, "begin") == 0)
cs->guard_depth++; cs->guard_depth++;
@@ -503,6 +510,9 @@ control_notify_write(struct client *c, const char *fmt, ...)
va_list ap; va_list ap;
char *line; char *line;
if (cs == NULL)
return;
va_start(ap, fmt); va_start(ap, fmt);
xvasprintf(&line, fmt, ap); xvasprintf(&line, fmt, ap);
va_end(ap); va_end(ap);