stable inclusion
from stable-v5.10.132
commit 831e190175f10652be93b08436cc7bf2e62e4bb6
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5YS3T

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=831e190175f10652be93b08436cc7bf2e62e4bb6

--------------------------------

[ Upstream commit d2ee2cfc ]

When the ima-modsig is enabled, the rc passed to evm_verifyxattr() may be
negative, which may cause the integer overflow problem.

Fixes: 39b07096 ("ima: Implement support for module-style appended signatures")
Signed-off-by: NHuaxin Lu <luhuaxin1@huawei.com>
Signed-off-by: NMimi Zohar <zohar@linux.ibm.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>