diff options
| author | Casey Schaufler <[email protected]> | 2022-01-27 04:51:00 +0000 |
|---|---|---|
| committer | Paul Moore <[email protected]> | 2022-01-28 01:43:02 +0000 |
| commit | ecff30575b5ad0eda149aadad247b7f75411fd47 (patch) | |
| tree | 5d8e8802ce75d4c3e43d7dd1a4c5d0c300e401a5 /security/selinux/hooks.c | |
| parent | selinux: fix a type cast problem in cred_init_security() (diff) | |
| download | kernel-ecff30575b5ad0eda149aadad247b7f75411fd47.tar.gz kernel-ecff30575b5ad0eda149aadad247b7f75411fd47.zip | |
LSM: general protection fault in legacy_parse_param
The usual LSM hook "bail on fail" scheme doesn't work for cases where
a security module may return an error code indicating that it does not
recognize an input. In this particular case Smack sees a mount option
that it recognizes, and returns 0. A call to a BPF hook follows, which
returns -ENOPARAM, which confuses the caller because Smack has processed
its data.
The SELinux hook incorrectly returns 1 on success. There was a time
when this was correct, however the current expectation is that it
return 0 on success. This is repaired.
Reported-by: [email protected]
Signed-off-by: Casey Schaufler <[email protected]>
Acked-by: James Morris <[email protected]>
Signed-off-by: Paul Moore <[email protected]>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 221e642025f5..9e3658e9e7ca 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2859,10 +2859,9 @@ static int selinux_fs_context_parse_param(struct fs_context *fc, return opt; rc = selinux_add_opt(opt, param->string, &fc->security); - if (!rc) { + if (!rc) param->string = NULL; - rc = 1; - } + return rc; } |