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authorTyler Hicks <tyhicks@canonical.com>2018-07-06 05:25:01 +0000
committerJohn Johansen <john.johansen@canonical.com>2018-07-19 16:29:13 -0700
commitf4585bc20fc785d94192cf780ee925e25891ddfd (patch)
tree980af813ba27efaf57f98d3c7323a716ca40b221 /security/apparmor
parent7f3ebcf2b1395e0248e56146041e1e5625fd2f23 (diff)
downloadlinux-f4585bc20fc785d94192cf780ee925e25891ddfd.tar.bz2
apparmor: Fully initialize aa_perms struct when answering userspace query
Fully initialize the aa_perms struct in profile_query_cb() to avoid the potential of using an uninitialized struct member's value in a response to a query from userspace. Detected by CoverityScan CID#1415126 ("Uninitialized scalar variable") Fixes: 4f3b3f2d79a4 ("apparmor: add profile permission query ability") Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Acked-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
Diffstat (limited to 'security/apparmor')
-rw-r--r--security/apparmor/apparmorfs.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 949dd8a48164..e09fe4d7307c 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -603,7 +603,7 @@ static const struct file_operations aa_fs_ns_revision_fops = {
static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
const char *match_str, size_t match_len)
{
- struct aa_perms tmp;
+ struct aa_perms tmp = { };
struct aa_dfa *dfa;
unsigned int state = 0;
@@ -613,7 +613,6 @@ static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
dfa = profile->file.dfa;
state = aa_dfa_match_len(dfa, profile->file.start,
match_str + 1, match_len - 1);
- tmp = nullperms;
if (state) {
struct path_cond cond = { };
@@ -627,8 +626,6 @@ static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
match_str, match_len);
if (state)
aa_compute_perms(dfa, state, &tmp);
- else
- tmp = nullperms;
}
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum_raw(perms, &tmp);