When executing usb_add_phy() and usb_add_phy_dev() it is possible that usb_add_extcon() fails (for example with -EPROBE_DEFER), in which case the usb_phy does not get added to phy_list via list_add_tail(&x->head, phy_list).
Then, when the driver that tried to add the phy receives the error propagated from usb_add_extcon() and calls into usb_remove_phy() to undo the partial registration there will be an unconditional call to list_del(&x->head) which is notinitialized and leads to a NULL pointer dereference.
Fix this by initializing x->head before usb_add_extcon() has a chance to fail.
Fixes: 7d21114dc6a2d53 ("usb: phy: Introduce one extcon device into usb phy") Cc: stable@vger.kernel.org Signed-off-by: Diogo Ivo diogo.ivo@tecnico.ulisboa.pt --- drivers/usb/phy/phy.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c index e1435bc59662..5a9b9353f343 100644 --- a/drivers/usb/phy/phy.c +++ b/drivers/usb/phy/phy.c @@ -646,6 +646,8 @@ int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) return -EINVAL; }
+ INIT_LIST_HEAD(&x->head); + usb_charger_init(x); ret = usb_add_extcon(x); if (ret) @@ -696,6 +698,8 @@ int usb_add_phy_dev(struct usb_phy *x) return -EINVAL; }
+ INIT_LIST_HEAD(&x->head); + usb_charger_init(x); ret = usb_add_extcon(x); if (ret)
--- base-commit: 35d084745b3ea4af571ed421844f2bb1a99ad6e2 change-id: 20251113-diogo-smaug_typec-56b2059b892b
Best regards,