add a test for bad buf_ring register
This shows up a kernel panic in v5.19-rc7
Link:
@@ -206,6 +206,30 @@ static int test_reg_unreg(int bgid)
return 0;
}
+static int test_bad_reg(int bgid)
+{
+ struct io_uring ring;
+ int ret;
+ struct io_uring_buf_reg reg = { };
+
+ ret = t_create_ring(1, &ring, 0);
+ if (ret == T_SETUP_SKIP)
+ return 0;
+ else if (ret != T_SETUP_OK)
+ return 1;
+
+ reg.ring_addr = 4096;
+ reg.ring_entries = 32;
+ reg.bgid = bgid;
+
+ ret = io_uring_register_buf_ring(&ring, &reg, 0);
+ if (!ret)
+ fprintf(stderr, "Buffer ring register worked unexpectedly\n");
+
+ io_uring_queue_exit(&ring);
+ return !ret;
+}
+
static int test_one_read(int fd, int bgid, struct io_uring *ring)
{
int ret;
@@ -359,6 +383,12 @@ int main(int argc, char *argv[])
if (no_buf_ring)
break;
+ ret = test_bad_reg(bgids[i]);
+ if (ret) {
+ fprintf(stderr, "test_bad_reg failed\n");
+ return T_EXIT_FAIL;
+ }
+
ret = test_double_reg_unreg(bgids[i]);
if (ret) {
fprintf(stderr, "test_double_reg_unreg failed\n");
