[PATCH 5.10 276/509] apparmor: fix missing error check for rhashtable_insert_fast

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From: Danila Chernetsov <listdansp@xxxxxxx>

[ Upstream commit 000518bc5aef25d3f703592a0296d578c98b1517 ]

 rhashtable_insert_fast() could return err value when memory allocation is
 failed. but unpack_profile() do not check values and this always returns
 success value. This patch just adds error check code.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: e025be0f26d5 ("apparmor: support querying extended trusted helper extra data")

Signed-off-by: Danila Chernetsov <listdansp@xxxxxxx>
Signed-off-by: John Johansen <john.johansen@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 security/apparmor/policy_unpack.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 519656e685822..10896d69c442a 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -909,8 +909,13 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
 				goto fail;
 			}
 
-			rhashtable_insert_fast(profile->data, &data->head,
-					       profile->data->p);
+			if (rhashtable_insert_fast(profile->data, &data->head,
+						   profile->data->p)) {
+				kfree_sensitive(data->key);
+				kfree_sensitive(data);
+				info = "failed to insert data to table";
+				goto fail;
+			}
 		}
 
 		if (!unpack_nameX(e, AA_STRUCTEND, NULL)) {
-- 
2.39.2






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