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linux/drivers/usb/gadget
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Prashanth K 374447e336 usb: gadget: u_serial: Add null pointer check in gserial_suspend 
[ Upstream commit 2f6ecb89fe ]

Consider a case where gserial_disconnect has already cleared
gser->ioport. And if gserial_suspend gets called afterwards,
it will lead to accessing of gser->ioport and thus causing
null pointer dereference.

Avoid this by adding a null pointer check. Added a static
spinlock to prevent gser->ioport from becoming null after
the newly added null pointer check.

Fixes: aba3a8d01d ("usb: gadget: u_serial: add suspend resume callbacks")
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1683278317-11774-1-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-07-19 16:36:31 +02:00
..
function usb: gadget: u_serial: Add null pointer check in gserial_suspend 2023-07-19 16:36:31 +02:00
legacy Merge 6.3-rc6 into usb-next 2023-04-10 08:56:59 +02:00
udc usb: gadget: udc: core: Prevent soft_connect_store() race 2023-06-13 12:16:34 +02:00
composite.c usb: gadget: Handle function suspend feature selector 2023-03-29 10:27:01 +02:00
config.c usb: fix various gadget panics on 10gbps cabling 2021-06-09 10:40:08 +02:00
configfs.c usb: gadget: Properly configure the device for remote wakeup 2023-03-29 10:27:00 +02:00
configfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
epautoconf.c usb: gadget: fix for a typo that conveys logically-inverted information. 2021-09-14 10:27:54 +02:00
functions.c USB: add SPDX identifiers to all remaining files in drivers/usb/ 2017-11-04 11:48:02 +01:00
Kconfig usb: uvc: move uvc_fmts and uvc_format_by_guid to own compile unit 2023-01-31 09:40:42 +01:00
Makefile usb: gadget: Makefile: remove ccflags-y 2022-03-18 12:56:08 +01:00
u_f.c usb: gadget: Change Andrzej Pietrasiewicz's e-mail address 2019-02-11 11:12:29 +02:00
u_f.h USB: gadget: u_f: Unbreak offset calculation in VLAs 2020-08-27 09:25:06 +02:00
u_os_desc.h usb: gadget: Change Andrzej Pietrasiewicz's e-mail address 2019-02-11 11:12:29 +02:00
usbstring.c usb: gadget: fix langid kernel-doc warning in usbstring.c 2020-07-09 10:13:07 +03:00