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Filename Latest commit message Latest commit date
Johan Hovold b48b4b1885 USB: dwc3: qcom: fix NULL-deref on suspend
[ Upstream commit d2d69354226de0b333d4405981f3d9c41ba8430a ]

The Qualcomm dwc3 glue driver is currently accessing the driver data of
the child core device during suspend and on wakeup interrupts. This is
clearly a bad idea as the child may not have probed yet or could have
been unbound from its driver.

The first such layering violation was part of the initial version of the
driver, but this was later made worse when the hack that accesses the
driver data of the grand child xhci device to configure the wakeup
interrupts was added.

Fixing this properly is not that easily done, so add a sanity check to
make sure that the child driver data is non-NULL before dereferencing it
for now.

Note that this relies on subtleties like the fact that driver core is
making sure that the parent is not suspended while the child is probing.

Reported-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/all/20230325165217.31069-4-manivannan.sadhasivam@linaro.org/
Fixes: d9152161b4 ("usb: dwc3: Add Qualcomm DWC3 glue layer driver")
Fixes: 6895ea55c385 ("usb: dwc3: qcom: Configure wakeup interrupts during suspend")
Cc: stable@vger.kernel.org	# 3.18: a872ab303d5d: "usb: dwc3: qcom: fix use-after-free on runtime-PM wakeup"
Cc: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Cc: Krishna Kurapati <quic_kriskura@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Message-ID: <20230607100540.31045-2-johan+linaro@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-08-30 16:27:13 +02:00
arch powerpc/kasan: Disable KCOV in KASAN code 2023-08-30 16:27:11 +02:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:37:29 +02:00
certs
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-06-21 15:44:08 +02:00
Documentation PM: runtime: Add pm_runtime_get_if_active() 2023-08-30 16:27:12 +02:00
drivers USB: dwc3: qcom: fix NULL-deref on suspend 2023-08-30 16:27:13 +02:00
fs gfs2: Fix possible data races in gfs2_show_options() 2023-08-30 16:27:10 +02:00
include interconnect: Add helpers for enabling/disabling a path 2023-08-30 16:27:13 +02:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:56:36 +02:00
ipc
kernel perf: Fix function pointer case 2023-08-11 11:53:54 +02:00
lib test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation 2023-08-11 11:54:00 +02:00
LICENSES
mm mm: make wait_on_page_writeback() wait for multiple pending writebacks 2023-06-28 10:18:42 +02:00
net Bluetooth: L2CAP: Fix use-after-free 2023-08-30 16:27:11 +02:00
samples samples/bpf: Fix buffer overflow in tcp_basertt 2023-07-27 08:37:07 +02:00
scripts modpost: fix off by one in is_executable_section() 2023-07-27 08:37:18 +02:00
security IMA: allow/fix UML builds 2023-08-30 16:27:11 +02:00
sound ALSA: hda: Fix unhandled register update during auto-suspend period 2023-08-30 16:27:12 +02:00
tools selftests: forwarding: tc_flower: Relax success criterion 2023-08-30 16:27:08 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-30 16:27:12 +02:00
Makefile Linux 5.4.254 2023-08-16 18:19:25 +02:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.