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Message-id: <1444122017-16856-1-git-send-email-a.hajda@samsung.com> Date: Tue, 06 Oct 2015 11:00:17 +0200 From: Andrzej Hajda <a.hajda@...sung.com> To: linux-kernel@...r.kernel.org Cc: Andrzej Hajda <a.hajda@...sung.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, Marek Szyprowski <m.szyprowski@...sung.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, kernel-janitors@...r.kernel.org Subject: [PATCH] perf tools: fix handling read result The function can return negative value, assigning it to unsigned variable can cause memory corruption. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576 Signed-off-by: Andrzej Hajda <a.hajda@...sung.com> --- tools/perf/util/event.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index cb98b5a..8b10621 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -67,7 +67,8 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, char filename[PATH_MAX]; char bf[4096]; int fd; - size_t size = 0, n; + size_t size = 0; + ssize_t n; char *nl, *name, *tgids, *ppids; *tgid = -1; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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