4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Brian Norris <computersforpeace@xxxxxxxxx>
commit 47e0bbb7fa985a0f1b5794a8653fae4f8f49de77 upstream.
request_firmware() failures currently won't get reported at all (the
error code is discarded). What's more, we get confusing messages, like:
# echo -n notafile > /sys/devices/virtual/misc/test_firmware/trigger_request
[ 8280.311856] test_firmware: loading 'notafile'
[ 8280.317042] test_firmware: load of 'notafile' failed: -2
[ 8280.322445] test_firmware: loaded: 0
# echo $?
0
Report the failures via write() errors, and don't say we "loaded"
anything.
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
lib/test_firmware.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -65,14 +65,19 @@ static ssize_t trigger_request_store(str
release_firmware(test_firmware);
test_firmware = NULL;
rc = request_firmware(&test_firmware, name, dev);
- if (rc)
+ if (rc) {
pr_info("load of '%s' failed: %d\n", name, rc);
- pr_info("loaded: %zu\n", test_firmware ? test_firmware->size : 0);
+ goto out;
+ }
+ pr_info("loaded: %zu\n", test_firmware->size);
+ rc = count;
+
+out:
mutex_unlock(&test_fw_mutex);
kfree(name);
- return count;
+ return rc;
}
static DEVICE_ATTR_WO(trigger_request);