From: Kees Cook <keescook@xxxxxxxxxxxx> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 471b095dfe0d693a8d624cbc716d1ee4d74eb437 upstream. An empty firmware request name will trigger warnings when building device names. Make sure this is caught earlier and rejected. The warning was visible via the test_firmware.ko module interface: echo -ne "\x00" > /sys/devices/virtual/misc/test_firmware/trigger_request Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Tested-by: Sasha Levin <sasha.levin@xxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/base/firmware_class.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 701212ba38b7..ec85b816fd5a 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -1063,6 +1063,9 @@ _request_firmware(const struct firmware **firmware_p, const char *name, if (!firmware_p) return -EINVAL; + if (!name || name[0] == '\0') + return -EINVAL; + ret = _request_firmware_prepare(&fw, name, device); if (ret <= 0) /* error or already assigned */ goto out; -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html