diff options
| author |   THOBY Simon <Simon.THOBY@viveris.fr> | 2021-08-22 08:55:26 +0000 |
|---|---|---|
| committer |   Mimi Zohar <zohar@linux.ibm.com> | 2021-08-23 18:22:00 -0400 |
| commit | cb181da161963eddc9de0000de6ab2c7942be219 (patch) | |
| tree | cf41ca44b1e7b216b75f9ffdc0c13fe776d144e6 /security/Kconfig.hardening | |
| parent | Merge branch 'restrict-digest-alg-v8' into next-integrity (diff) | |
| download | linux-dev-cb181da161963eddc9de0000de6ab2c7942be219.tar.xz linux-dev-cb181da161963eddc9de0000de6ab2c7942be219.zip | |
IMA: reject unknown hash algorithms in ima_get_hash_algo
The new function validate_hash_algo() assumed that ima_get_hash_algo()
always return a valid 'enum hash_algo', but it returned the
user-supplied value present in the digital signature without
any bounds checks.
Update ima_get_hash_algo() to always return a valid hash algorithm,
defaulting on 'ima_hash_algo' when the user-supplied value inside
the xattr is invalid.
Signed-off-by: THOBY Simon <Simon.THOBY@viveris.fr>
Reported-by: syzbot+e8bafe7b82c739eaf153@syzkaller.appspotmail.com
Fixes: 50f742dd9147 ("IMA: block writes of the security.ima xattr with unsupported algorithms")
Reviewed-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security/Kconfig.hardening')
0 files changed, 0 insertions, 0 deletions