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]>

0 files changed, 0 insertions, 0 deletions