From: John Johansen john.johansen@canonical.com
commit 2504db207146543736e877241f3b3de005cbe056 upstream.
When finding the profile via patterned attachments, the longest left match is being set to the static compile time value and not using the runtime computed value.
Fix this by setting the candidate value to the greater of the precomputed value or runtime computed value.
Fixes: 21f606610502 ("apparmor: improve overlapping domain attachment resolution") Signed-off-by: John Johansen john.johansen@canonical.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- security/apparmor/domain.c | 2 +- security/apparmor/include/policy.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
--- a/security/apparmor/domain.c +++ b/security/apparmor/domain.c @@ -464,7 +464,7 @@ restart: * xattrs, or a longer match */ candidate = profile; - candidate_len = profile->xmatch_len; + candidate_len = max(count, profile->xmatch_len); candidate_xattrs = ret; conflict = false; } --- a/security/apparmor/include/policy.h +++ b/security/apparmor/include/policy.h @@ -139,7 +139,7 @@ struct aa_profile {
const char *attach; struct aa_dfa *xmatch; - int xmatch_len; + unsigned int xmatch_len; enum audit_mode audit; long mode; u32 path_flags;