From 3eddc004f10ce69210d02fa6b031c0a6dfe4fc17 Mon Sep 17 00:00:00 2001 From: Christian Brauner Date: Mon, 16 Oct 2017 12:22:20 +0200 Subject: [PATCH] log: prevent stack smashing Signed-off-by: Christian Brauner --- src/lxc/log.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/lxc/log.c b/src/lxc/log.c index 6ca315bd6a..a99b4c8f04 100644 --- a/src/lxc/log.c +++ b/src/lxc/log.c @@ -297,7 +297,8 @@ static int log_append_logfile(const struct lxc_log_appender *appender, if ((size_t)n < (sizeof(buffer) - 1)) n += vsnprintf(buffer + n, sizeof(buffer) - n, event->fmt, *event->vap); - else + + if ((size_t)n >= sizeof(buffer)) n = sizeof(buffer) - 1; buffer[n] = '\n';