diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2016-12-05 11:44:23 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:04 +0200 |
| commit | f4f13b6cd202056ae7f8eb21488f2abe5bc53913 (patch) | |
| tree | 3363747474392c920e2bdc408954042fb5c1eeb8 /net/can/raw.c | |
| parent | e918990775c52eeb88a818f8691bfad24b9c85ca (diff) | |
can: raw: raw_setsockopt: limit number of can_filter that can be set
commit 332b05ca7a438f857c61a3c21a88489a21532364 upstream.
This patch adds a check to limit the number of can_filters that can be
set via setsockopt on CAN_RAW sockets. Otherwise allocations > MAX_ORDER
are not prevented resulting in a warning.
Reference: https://lkml.org/lkml/2016/12/2/230
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'net/can/raw.c')
| -rw-r--r-- | net/can/raw.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/can/raw.c b/net/can/raw.c index f4d864855..602be0e07 100644 --- a/net/can/raw.c +++ b/net/can/raw.c @@ -470,6 +470,9 @@ static int raw_setsockopt(struct socket *sock, int level, int optname, if (optlen % sizeof(struct can_filter) != 0) return -EINVAL; + if (optlen > CAN_RAW_FILTER_MAX * sizeof(struct can_filter)) + return -EINVAL; + count = optlen / sizeof(struct can_filter); if (count > 1) { |