net: sfp: fix hwmon_name memory leak on hwmon registration failure

hwmon_sanitize_name() allocates sfp->hwmon_name before
hwmon_device_register_with_info() is called. If the registration
fails, sfp->hwmon_dev is left pointing to an error while
sfp->hwmon_name remains allocated.

Later, when the SFP module is removed, sfp_hwmon_remove() only frees
hwmon_name when hwmon_dev is valid. As a result, hwmon_name is leaked
if hwmon_device_register_with_info() fails.

Free hwmon_name independently of hwmon_dev. Continue to unregister the
hwmon device only when hwmon_dev was successfully registered.

Cc: stable+noautosel@kernel.org # untested fix to unlikely driver error path
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Krishan Singh <krishanmohan298@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260809064504.70579-1-krishanmohan298@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions