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| author | Huaxin Lu <luhuaxin1@huawei.com> | 2022-07-05 08:14:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 22:20:04 +0300 |
| commit | 831e190175f10652be93b08436cc7bf2e62e4bb6 (patch) | |
| tree | 317b964e864f5fd12e0ad422faef8ebbb97715dd /security | |
| parent | 592f3bad00b7e2a95a6fb7a4f9e742c061c9c3c1 (diff) | |
| download | linux-831e190175f10652be93b08436cc7bf2e62e4bb6.tar.xz | |
ima: Fix a potential integer overflow in ima_appraise_measurement
[ Upstream commit d2ee2cfc4aa85ff6a2a3b198a3a524ec54e3d999 ]
When the ima-modsig is enabled, the rc passed to evm_verifyxattr() may be
negative, which may cause the integer overflow problem.
Fixes: 39b07096364a ("ima: Implement support for module-style appended signatures")
Signed-off-by: Huaxin Lu <luhuaxin1@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/integrity/ima/ima_appraise.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 3dd8c2e4314e..7122a359a268 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -396,7 +396,8 @@ int ima_appraise_measurement(enum ima_hooks func, goto out; } - status = evm_verifyxattr(dentry, XATTR_NAME_IMA, xattr_value, rc, iint); + status = evm_verifyxattr(dentry, XATTR_NAME_IMA, xattr_value, + rc < 0 ? 0 : rc, iint); switch (status) { case INTEGRITY_PASS: case INTEGRITY_PASS_IMMUTABLE: |