From f5727b05d221796baf69667ed5c891d4bd53711e Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Tue, 12 May 2015 14:49:40 -0700 Subject: [PATCH] firmware: fix __getname() missing failure check The request_firmware*() APIs uses __getname() to iterate over the list of paths possible for firmware to be found, the code however never checked for failure on __getname(). Although *very unlikely*, this can still happen. Add the missing check. There is still no checks on the concatenation of the path and filename passed, that requires a bit more work and subsequent patches address this. The commit that introduced this is abb139e7 ("firmware: teach the kernel to load firmware files directly from the filesystem"). mcgrof@ergon ~/linux (git::firmware-fixes) $ git describe --contains abb139e7 v3.7-rc1~120 Cc: Linus Torvalds Cc: Ming Lei Cc: Rusty Russell Cc: David Howells Cc: Kyle McMartin Signed-off-by: Luis R. Rodriguez Signed-off-by: Greg Kroah-Hartman --- drivers/base/firmware_class.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 171841ad1008..49139a1ee25e 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -322,7 +322,11 @@ static int fw_get_filesystem_firmware(struct device *device, { int i; int rc = -ENOENT; - char *path = __getname(); + char *path; + + path = __getname(); + if (!path) + return -ENOMEM; for (i = 0; i < ARRAY_SIZE(fw_path); i++) { struct file *file;