Udipto Goswami ed85777c64 usb: core: Prevent null pointer dereference in update_port_device_state ...

commit 12783c0b9e upstream.

Currently, the function update_port_device_state gets the usb_hub from
udev->parent by calling usb_hub_to_struct_hub.
However, in case the actconfig or the maxchild is 0, the usb_hub would
be NULL and upon further accessing to get port_dev would result in null
pointer dereference.

Fix this by introducing an if check after the usb_hub is populated.

Fixes: 83cb2604f6 ("usb: core: add sysfs entry for usb device state")
Cc: stable@vger.kernel.org
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20240110095814.7626-1-quic_ugoswami@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-02-23 09:24:57 +01:00

..

buffer.c

Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-06-28 10:28:11 -07:00

config.c

usb: config: fix iteration issue in 'usb_get_bos_descriptor()'

2023-12-03 07:33:09 +01:00

devices.c

USB: Remove remnants of Wireless USB and UWB

2023-08-09 14:17:06 +02:00

devio.c

usb: convert to ctime accessor functions

2023-07-13 10:28:03 +02:00

driver.c

USB: mark all struct bus_type as const

2023-03-23 13:22:00 +01:00

endpoint.c

…

file.c

USB: make usb class a const structure

2023-07-25 17:49:30 +02:00

generic.c

usb: core: Fix file path that does not exist

2021-12-05 14:24:19 +01:00

hcd-pci.c

USB: Extend pci resume function to handle PM events

2023-05-13 17:33:18 +09:00

hcd.c

USB: Remove remnants of Wireless USB and UWB

2023-08-09 14:17:06 +02:00

hub.c

usb: core: Prevent null pointer dereference in update_port_device_state

2024-02-23 09:24:57 +01:00

hub.h

usb: hub: Guard against accesses to uninitialized BOS descriptors

2023-10-02 13:51:24 +02:00

Kconfig

…

ledtrig-usbport.c

usb: core: Use module_led_trigger macro to simplify the code

2023-08-22 14:44:23 +02:00

Makefile

usb: misc: Add onboard_usb_hub driver

2022-07-08 14:53:50 +02:00

message.c

USB: core: Change usb_get_device_descriptor() API

2023-08-08 10:45:32 +02:00

notify.c

…

of.c

usb: Explicitly include correct DT includes

2023-07-25 18:20:02 +02:00

otg_productlist.h

…

phy.c

…

phy.h

…

port.c

usb: core: add sysfs entry for usb device state

2023-06-13 11:58:26 +02:00

quirks.c

USB: quirks: add quirk for Focusrite Scarlett

2023-07-25 17:41:22 +02:00

sysfs.c

USB: Remove remnants of Wireless USB and UWB

2023-08-09 14:17:06 +02:00

urb.c

USB: Remove remnants of Wireless USB and UWB

2023-08-09 14:17:06 +02:00

usb-acpi.c

usb: acpi: Switch to use acpi_evaluate_dsm_typed()

2023-03-16 12:15:10 +01:00

usb.c

USB: core: Fix unused variable warning in usb_alloc_dev()

2023-08-12 10:03:37 +02:00

usb.h

USB: core: Change usb_get_device_descriptor() API

2023-08-08 10:45:32 +02:00