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smackfs: Prevent underflow in smk_set_cipso()
authorDan Carpenter <dan.carpenter@linaro.org>
Thu, 6 Jul 2023 05:52:39 +0000 (08:52 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 23 Sep 2023 08:46:56 +0000 (10:46 +0200)
commitfcebe4cff694b37badeb2910f5e9fbfdf537c799
tree0c79652e1393353f6792eea268a46281128826b3tree
parentc364fa869b33ca42a263bf91c22fce7e6c61d479commit | diff
smackfs: Prevent underflow in smk_set_cipso()

[ Upstream commit 3ad49d37cf5759c3b8b68d02e3563f633d9c1aee ]

There is a upper bound to "catlen" but no lower bound to prevent
negatives.  I don't see that this necessarily causes a problem but we
may as well be safe.

Fixes: e114e473771c ("Smack: Simplified Mandatory Access Control Kernel")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
security/smack/smackfs.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git