This is a note to let you know that I've just added the patch titled
net: sctp: fix array overrun read on sctp_timer_tbl
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: net-sctp-fix-array-overrun-read-on-sctp_timer_tbl.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Dec 6 16:43:17 CET 2017
From: Colin Ian King colin.king@canonical.com Date: Fri, 20 Jan 2017 13:01:57 +0000 Subject: net: sctp: fix array overrun read on sctp_timer_tbl
From: Colin Ian King colin.king@canonical.com
[ 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@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sctp/debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- 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"; }
Patches currently in stable-queue which might be from colin.king@canonical.com are
queue-4.4/net-sctp-fix-array-overrun-read-on-sctp_timer_tbl.patch