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| author | Norbert Slusarek <nslusarek@gmx.net> | 2021-06-20 14:38:42 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2021-06-24 08:28:51 +0200 |
| commit | aaf473d0100f64abc88560e2bea905805bcf2a8e (patch) | |
| tree | 1fb4a353da56ac6f7ebe4a5437e9271fb3485193 /fs/jfs/jfs_discard.c | |
| parent | c2f5c57d99debf471a1b263cdf227e55f1364e95 (diff) | |
| download | linux-aaf473d0100f64abc88560e2bea905805bcf2a8e.tar.bz2 | |
can: j1939: j1939_sk_setsockopt(): prevent allocation of j1939 filter for optlen == 0
If optval != NULL and optlen == 0 are specified for SO_J1939_FILTER in
j1939_sk_setsockopt(), memdup_sockptr() will return ZERO_PTR for 0
size allocation. The new filter will be mistakenly assigned ZERO_PTR.
This patch checks for optlen != 0 and filter will be assigned NULL in
case of optlen == 0.
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Link: https://lore.kernel.org/r/20210620123842.117975-1-nslusarek@gmx.net
Signed-off-by: Norbert Slusarek <nslusarek@gmx.net>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'fs/jfs/jfs_discard.c')
0 files changed, 0 insertions, 0 deletions