This is a note to let you know that I've just added the patch titled
apparmor: fix use of strcpy in policy_unpack_test
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
apparmor-fix-use-of-strcpy-in-policy_unpack_test.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cd977c31a043251b9fe334afe2a2ab102689f5a0
Author: Rae Moar <rmoar@xxxxxxxxxx>
Date: Fri Jan 27 20:12:19 2023 +0000
apparmor: fix use of strcpy in policy_unpack_test
[ Upstream commit b54aebd4411134b525a82d663a26b2f135ecb7e8 ]
Replace the use of strcpy() in build_aa_ext_struct() in
policy_unpack_test.c with strscpy().
strscpy() is the safer method to use to ensure the buffer does not
overflow. This was found by kernel test robot:
https://lore.kernel.org/all/202301040348.NbfVsXO0-lkp@xxxxxxxxx/.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Rae Moar <rmoar@xxxxxxxxxx>
Signed-off-by: John Johansen <john.johansen@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/security/apparmor/policy_unpack_test.c b/security/apparmor/policy_unpack_test.c
index 533137f45361c..3c84981aa1f48 100644
--- a/security/apparmor/policy_unpack_test.c
+++ b/security/apparmor/policy_unpack_test.c
@@ -66,31 +66,30 @@ struct aa_ext *build_aa_ext_struct(struct policy_unpack_fixture *puf,
*buf = AA_NAME;
*(buf + 1) = strlen(TEST_STRING_NAME) + 1;
- strcpy(buf + 3, TEST_STRING_NAME);
+ strscpy(buf + 3, TEST_STRING_NAME, e->end - (void *)(buf + 3));
buf = e->start + TEST_STRING_BUF_OFFSET;
*buf = AA_STRING;
*(buf + 1) = strlen(TEST_STRING_DATA) + 1;
- strcpy(buf + 3, TEST_STRING_DATA);
-
+ strscpy(buf + 3, TEST_STRING_DATA, e->end - (void *)(buf + 3));
buf = e->start + TEST_NAMED_U32_BUF_OFFSET;
*buf = AA_NAME;
*(buf + 1) = strlen(TEST_U32_NAME) + 1;
- strcpy(buf + 3, TEST_U32_NAME);
+ strscpy(buf + 3, TEST_U32_NAME, e->end - (void *)(buf + 3));
*(buf + 3 + strlen(TEST_U32_NAME) + 1) = AA_U32;
*((u32 *)(buf + 3 + strlen(TEST_U32_NAME) + 2)) = TEST_U32_DATA;
buf = e->start + TEST_NAMED_U64_BUF_OFFSET;
*buf = AA_NAME;
*(buf + 1) = strlen(TEST_U64_NAME) + 1;
- strcpy(buf + 3, TEST_U64_NAME);
+ strscpy(buf + 3, TEST_U64_NAME, e->end - (void *)(buf + 3));
*(buf + 3 + strlen(TEST_U64_NAME) + 1) = AA_U64;
*((u64 *)(buf + 3 + strlen(TEST_U64_NAME) + 2)) = TEST_U64_DATA;
buf = e->start + TEST_NAMED_BLOB_BUF_OFFSET;
*buf = AA_NAME;
*(buf + 1) = strlen(TEST_BLOB_NAME) + 1;
- strcpy(buf + 3, TEST_BLOB_NAME);
+ strscpy(buf + 3, TEST_BLOB_NAME, e->end - (void *)(buf + 3));
*(buf + 3 + strlen(TEST_BLOB_NAME) + 1) = AA_BLOB;
*(buf + 3 + strlen(TEST_BLOB_NAME) + 2) = TEST_BLOB_DATA_SIZE;
memcpy(buf + 3 + strlen(TEST_BLOB_NAME) + 6,
@@ -99,7 +98,7 @@ struct aa_ext *build_aa_ext_struct(struct policy_unpack_fixture *puf,
buf = e->start + TEST_NAMED_ARRAY_BUF_OFFSET;
*buf = AA_NAME;
*(buf + 1) = strlen(TEST_ARRAY_NAME) + 1;
- strcpy(buf + 3, TEST_ARRAY_NAME);
+ strscpy(buf + 3, TEST_ARRAY_NAME, e->end - (void *)(buf + 3));
*(buf + 3 + strlen(TEST_ARRAY_NAME) + 1) = AA_ARRAY;
*((u16 *)(buf + 3 + strlen(TEST_ARRAY_NAME) + 2)) = TEST_ARRAY_SIZE;
