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apparmor: fix oops in profile_unpack() when policy_db is not present

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BugLink: http://bugs.launchpad.net/bugs/1592547

If unpack_dfa() returns NULL due to the dfa not being present,
profile_unpack() is not checking if the dfa is not present (NULL).

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2016-06-15 10:00:55 +03:00
parent 3197f5adf5
commit 5f20fdfed1
1 changed files with 3 additions and 0 deletions
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3
security/apparmor/policy_unpack.c
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@ -583,6 +583,9 @@ static struct aa_profile *unpack_profile(struct aa_ext *e)
error = PTR_ERR(profile->policy.dfa);
profile->policy.dfa = NULL;
goto fail;
} else if (!profile->policy.dfa) {
error = -EPROTO;
goto fail;
}
if (!unpack_u32(e, &profile->policy.start[0], "start"))
/* default start state */