[PATCH] HID: sony: clean up device list on probe failure
From: Doruk Tan Ozturk <hidden>
Date: 2026-07-26 12:45:55
Also in:
lkml, stable
Subsystem:
hid core layer, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
sony_input_configured() adds some controllers to sony_device_list before HID core registers their input devices. input_register_device() can fail after the callback returns successfully. sony_probe() then observes that HID_CLAIMED_INPUT is clear and unwinds, but only stops the HID hardware. The devres-managed sony_sc is freed while its list node remains linked, so the next matching controller traverses freed memory. Initialize the list node and device ID to inactive states. Make list removal idempotent and run the driver-private cleanup on every probe failure path. This also makes a second cleanup safe when sony_input_configured() already unwound a partial initialization before sony_probe() handles the missing input claim. Found by 0sec (https://0sec.ai) using automated source analysis; verified against the HID input registration and probe unwind paths. Fixes: 4f967f6d7374 ("HID: sony: Fix memory issue when connecting device using both Bluetooth and USB") Cc: stable@vger.kernel.org Reported-by: Doruk Tan Ozturk <redacted> Link: https://lore.kernel.org/linux-input/20260724143925.007D61F00A3A@smtp.kernel.org/ (local) Assisted-by: 0sec:multi-model Signed-off-by: Doruk Tan Ozturk <redacted> --- drivers/hid/hid-sony.c | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-)
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 253fff4066ebd..56471b7b052d1 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c@@ -1982,11 +1982,10 @@ static int sony_check_add_dev_list(struct sony_sc *sc) static void sony_remove_dev_list(struct sony_sc *sc) { - if (sc->list_node.next) { - scoped_guard(spinlock_irqsave, &sony_dev_list_lock) { - list_del(&(sc->list_node)); - } - } + guard(spinlock_irqsave)(&sony_dev_list_lock); + + if (!list_empty(&sc->list_node)) + list_del_init(&sc->list_node); } static int sony_get_bt_devaddr(struct sony_sc *sc)
@@ -2127,6 +2126,13 @@ static inline void sony_cancel_work_sync(struct sony_sc *sc) } } +static void sony_cleanup(struct sony_sc *sc) +{ + sony_cancel_work_sync(sc); + sony_remove_dev_list(sc); + sony_release_device_id(sc); +} + static int sony_input_configured(struct hid_device *hdev, struct hid_input *hidinput) {
@@ -2313,9 +2319,7 @@ static int sony_input_configured(struct hid_device *hdev, err_close: hid_hw_close(hdev); err_stop: - sony_cancel_work_sync(sc); - sony_remove_dev_list(sc); - sony_release_device_id(sc); + sony_cleanup(sc); return ret; }
@@ -2339,6 +2343,8 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id) return -ENOMEM; spin_lock_init(&sc->lock); + INIT_LIST_HEAD(&sc->list_node); + sc->device_id = -1; sc->quirks = quirks; hid_set_drvdata(hdev, sc);
@@ -2367,6 +2373,7 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id) ret = hid_hw_start(hdev, connect_mask); if (ret) { hid_err(hdev, "hw start failed\n"); + sony_cleanup(sc); return ret; }
@@ -2421,7 +2428,7 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id) err: usb_free_urb(sc->ghl_urb); - + sony_cleanup(sc); hid_hw_stop(hdev); return ret; }
@@ -2436,13 +2443,7 @@ static void sony_remove(struct hid_device *hdev) } hid_hw_close(hdev); - - sony_cancel_work_sync(sc); - - sony_remove_dev_list(sc); - - sony_release_device_id(sc); - + sony_cleanup(sc); hid_hw_stop(hdev); }
--
2.43.0