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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-03-01 16:44:50 +0100 |
|---|---|---|
| committer | Stefan Schmidt <stefan@datenfreihafen.org> | 2023-03-02 14:39:48 +0100 |
| commit | 02f18662f6c671382345fcb696e808d78f4c194a (patch) | |
| tree | 3758ec8613ed2cbed5788b9a2fde6455470d23fb /net | |
| parent | 6c993779ea1d0cccdb3a5d7d45446dd229e610a3 (diff) | |
| download | linux-stable-02f18662f6c671382345fcb696e808d78f4c194a.tar.gz linux-stable-02f18662f6c671382345fcb696e808d78f4c194a.tar.bz2 linux-stable-02f18662f6c671382345fcb696e808d78f4c194a.zip | |
ieee802154: Prevent user from crashing the host
Avoid crashing the machine by checking
info->attrs[NL802154_ATTR_SCAN_TYPE] presence before de-referencing it,
which was the primary intend of the blamed patch.
Reported-by: Sanan Hasanov <sanan.hasanov@Knights.ucf.edu>
Suggested-by: Eric Dumazet <edumazet@google.com>
Fixes: a0b6106672b5 ("ieee802154: Convert scan error messages to extack")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230301154450.547716-1-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ieee802154/nl802154.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 2215f576ee37..d8f4379d4fa6 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1412,7 +1412,7 @@ static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info) return -EOPNOTSUPP; } - if (!nla_get_u8(info->attrs[NL802154_ATTR_SCAN_TYPE])) { + if (!info->attrs[NL802154_ATTR_SCAN_TYPE]) { NL_SET_ERR_MSG(info->extack, "Malformed request, missing scan type"); return -EINVAL; } |