From: Colin Ian King colin.king@canonical.com
This patch has been added to the stable tree. If you have any objections, please let us know.
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[ Upstream commit 0e73fc9a56f22f2eec4d2b2910c649f7af67b74d ]
The comparison on the timeout can lead to an array overrun read on sctp_timer_tbl because of an off-by-one error. Fix this by using < instead of <= and also compare to the array size rather than SCTP_EVENT_TIMEOUT_MAX.
Fixes CoverityScan CID#1397639 ("Out-of-bounds read")
Signed-off-by: Colin Ian King colin.king@canonical.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- net/sctp/debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sctp/debug.c b/net/sctp/debug.c index 95d7b15dad21..e371a0d90068 100644 --- a/net/sctp/debug.c +++ b/net/sctp/debug.c @@ -166,7 +166,7 @@ static const char *const sctp_timer_tbl[] = { /* Lookup timer debug name. */ const char *sctp_tname(const sctp_subtype_t id) { - if (id.timeout <= SCTP_EVENT_TIMEOUT_MAX) + if (id.timeout < ARRAY_SIZE(sctp_timer_tbl)) return sctp_timer_tbl[id.timeout]; return "unknown_timer"; }