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[ Upstream commita6bd4f6d9b] This is similar to commit84e99e58e8("Smack: slab-out-of-bounds in vsscanf") where we added a bounds check on "rule". Reported-by: syzbot+a22c6092d003d6fe1122@syzkaller.appspotmail.com Fixes:f7112e6c9a("Smack: allow for significantly longer Smack labels v4") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Sasha Levin <sashal@kernel.org>