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selftest: af_unix: Add test case for backtrack after finalising SCC.

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syzkaller reported a KMSAN splat in __unix_walk_scc() while backtracking
edge_stack after finalising SCC.

Let's add a test case exercising the path.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Link: https://patch.msgid.link/20240702160428.10153-2-syoshida@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2024-07-03 01:04:28 +09:00
committed by Jakub Kicinski
parent 927fa5b3e4
commit 2a79651bf2
1 changed files with 23 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/testing/selftests/net/af_unix/scm_rights.c
+23 -2
View File
@@ -14,12 +14,12 @@
FIXTURE(scm_rights)
{
int fd[16];
int fd[32];
};
FIXTURE_VARIANT(scm_rights)
{
char name[16];
char name[32];
int type;
int flags;
bool test_listener;
@@ -172,6 +172,8 @@ static void __create_sockets(struct __test_metadata *_metadata,
const FIXTURE_VARIANT(scm_rights) *variant,
int n)
{
ASSERT_LE(n * 2, sizeof(self->fd) / sizeof(self->fd[0]));
if (variant->test_listener)
create_listeners(_metadata, self, n);
else
@@ -283,4 +285,23 @@ TEST_F(scm_rights, cross_edge)
close_sockets(8);
}
TEST_F(scm_rights, backtrack_from_scc)
{
create_sockets(10);
send_fd(0, 1);
send_fd(0, 4);
send_fd(1, 2);
send_fd(2, 3);
send_fd(3, 1);
send_fd(5, 6);
send_fd(5, 9);
send_fd(6, 7);
send_fd(7, 8);
send_fd(8, 6);
close_sockets(10);
}
TEST_HARNESS_MAIN