[PATCH 5.10] platform/x86: dell-laptop: fix missing cleanups in init error path

[Mikhail Dmitrichenko]

From: Haoxiang Li <lihaoxiang@xxxxxxxxxxxxxxxx>

commit 6e9cab2247e5b243ae2d907ce7c948a8a9c8d61a upstream.

dell_init() initializes several resources after dell_setup_rfkill(),
including the optional touchpad LED, keyboard backlight LED, battery
hook, debugfs directory and dell-laptop notifier.

If a later LED or backlight registration fails, the error path only
tears down the battery hook and rfkill resources. This leaves the
notifier, debugfs directory, keyboard backlight LED and optional
touchpad LED registered after dell_init() returns an error.

Add the missing cleanup calls before tearing down rfkill.

Fixes: 9c656b07997f ("platform/x86: dell-*: Call new led hw_changed API on kbd brightness change")
Fixes: 037accfa14b2 ("dell-laptop: Add debugfs support")
Fixes: 2d8b90be4f1c ("dell-laptop: support Synaptics/Alps touchpad led")
Fixes: 6cff8d60aa0a ("platform: x86: dell-laptop: Add support for keyboard backlight")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Haoxiang Li <lihaoxiang@xxxxxxxxxxxxxxxx>
Link: https://patch.msgid.link/20260609081419.1995169-1-lihaoxiang@xxxxxxxxxxxxxxxx
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
[mdmitrichenko: Apply to drivers/platform/x86/dell-laptop.c and adjust
 the error-path context, which has no battery hook.]
Signed-off-by: Mikhail Dmitrichenko <mdmitrichenko@xxxxxxxxxxxxx>
---
Backport fix for CVE-2026-72144

 drivers/platform/x86/dell-laptop.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index af5001ecf77f..71e58b9a6689 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -2268,6 +2268,11 @@ static int __init dell_init(void)
 fail_backlight:
 	led_classdev_unregister(&micmute_led_cdev);
 fail_led:
+	dell_laptop_unregister_notifier(&dell_laptop_notifier);
+	debugfs_remove_recursive(dell_laptop_dir);
+	kbd_led_exit();
+	if (quirks && quirks->touchpad_led)
+		touchpad_led_exit();
 	dell_cleanup_rfkill();
 fail_rfkill:
 	platform_device_del(platform_device);
-- 
2.43.0