[ commit be37bed754ed90b2655382f93f9724b3c1aae847 upstream ]
Dan Carpenter spotted that test_fw_config->reqs will be leaked if
trigger_batched_requests_store() is called two or more times.
The same appears with trigger_batched_requests_async_store().
This bug wasn't triggered by the tests, but observed by Dan's visual
inspection of the code.
The recommended workaround was to return -EBUSY if test_fw_config->reqs
is already allocated.
Fixes: c92316bf8e94 ("test_firmware: add batched firmware tests")
Cc: Luis Chamberlain <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Russ Weight <[email protected]>
Cc: Tianfei Zhang <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Colin Ian King <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: [email protected]
Cc: [email protected] # v4.14
Suggested-by: Dan Carpenter <[email protected]>
Suggested-by: Takashi Iwai <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mirsad Todorovac <[email protected]>
[ This fix is applied against the 4.14 stable branch. There are no changes to the ]
[ fix in code when compared to the upstread, only the reformatting for backport. ]
Signed-off-by: Mirsad Todorovac <[email protected]>
---
v1 -> v2:
removed the Reviewed-by: and Acked-by tags, as this is a slightly different patch and
those need to be reacquired
lib/test_firmware.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 1c5e5246bf10..5318c5e18acf 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -621,6 +621,11 @@ static ssize_t trigger_batched_requests_store(struct device *dev,
mutex_lock(&test_fw_mutex);
+ if (test_fw_config->reqs) {
+ rc = -EBUSY;
+ goto out_bail;
+ }
+
test_fw_config->reqs = vzalloc(sizeof(struct test_batched_req) *
test_fw_config->num_requests * 2);
if (!test_fw_config->reqs) {
@@ -723,6 +728,11 @@ ssize_t trigger_batched_requests_async_store(struct device *dev,
mutex_lock(&test_fw_mutex);
+ if (test_fw_config->reqs) {
+ rc = -EBUSY;
+ goto out_bail;
+ }
+
test_fw_config->reqs = vzalloc(sizeof(struct test_batched_req) *
test_fw_config->num_requests * 2);
if (!test_fw_config->reqs) {
--
2.34.1