smackfs: Prevent underflow in smk_set_cipso()

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[ Upstream commit 3ad49d37cf ]

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: e114e47377 ("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>

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Dan Carpenter 2023-07-06 08:52:39 +03:00 • committed by Greg Kroah-Hartman

parent d1994bb594

commit d41ceafe3d

1 changed files with 1 additions and 1 deletions

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security/smack/smackfs.c

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