This is a note to let you know that I've just added the patch titled
hsr: Handle failures in module init
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hsr-handle-failures-in-module-init.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4b7b42afd4be6412aeccffcb789d9ea2d382b32c
Author: Felix Maurer <fmaurer@xxxxxxxxxx>
Date: Fri Mar 15 13:04:52 2024 +0100
hsr: Handle failures in module init
[ Upstream commit 3cf28cd492308e5f63ed00b29ea03ca016264376 ]
A failure during registration of the netdev notifier was not handled at
all. A failure during netlink initialization did not unregister the netdev
notifier.
Handle failures of netdev notifier registration and netlink initialization.
Both functions should only return negative values on failure and thereby
lead to the hsr module not being loaded.
Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)")
Signed-off-by: Felix Maurer <fmaurer@xxxxxxxxxx>
Reviewed-by: Shigeru Yoshida <syoshida@xxxxxxxxxx>
Reviewed-by: Breno Leitao <leitao@xxxxxxxxxx>
Link: https://lore.kernel.org/r/3ce097c15e3f7ace98fc7fd9bcbf299f092e63d1.1710504184.git.fmaurer@xxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c
index 9e389accbfc7e..ea627e532aab8 100644
--- a/net/hsr/hsr_main.c
+++ b/net/hsr/hsr_main.c
@@ -113,14 +113,21 @@ static struct notifier_block hsr_nb = {
static int __init hsr_init(void)
{
- int res;
+ int err;
BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
- register_netdevice_notifier(&hsr_nb);
- res = hsr_netlink_init();
+ err = register_netdevice_notifier(&hsr_nb);
+ if (err)
+ return err;
+
+ err = hsr_netlink_init();
+ if (err) {
+ unregister_netdevice_notifier(&hsr_nb);
+ return err;
+ }
- return res;
+ return 0;
}
static void __exit hsr_exit(void)
