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Jann Horn c2e39d5df0 HID: uhid: Fix worker destroying device without any protection commit `4ea5763fb7` upstream. uhid has to run hid_add_device() from workqueue context while allowing parallel use of the userspace API (which is protected with ->devlock). But hid_add_device() can fail. Currently, that is handled by immediately destroying the associated HID device, without using ->devlock - but if there are concurrent requests from userspace, that's wrong and leads to NULL dereferences and/or memory corruption (via use-after-free). Fix it by leaving the HID device as-is in the worker. We can clean it up later, either in the UHID_DESTROY command handler or in the ->release() handler. Cc: stable@vger.kernel.org Fixes: `67f8ecc550` ("HID: uhid: fix timeout when probe races with IO") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-01-27 10:53:40 +01:00
arch	KVM: VMX: switch blocked_vcpu_on_cpu_lock to raw spinlock	2022-01-27 10:53:40 +01:00
block	iocost: Fix divide-by-zero on donation from low hweight cgroup	2021-12-22 09:30:57 +01:00
certs	certs: Trigger creation of RSA module signing key if it's not an RSA key	2021-09-15 09:50:29 +02:00
crypto	crypto: pcrypt - Delay write to padata->info	2021-11-18 14:04:12 +01:00
Documentation	bpf: Add kconfig knob for disabling unpriv bpf by default	2022-01-05 12:40:34 +01:00
drivers	HID: uhid: Fix worker destroying device without any protection	2022-01-27 10:53:40 +01:00
fs	9p: only copy valid iattrs in 9P2000.L setattr implementation	2022-01-20 09:17:50 +01:00
include	perf: Protect perf_guest_cbs with RCU	2022-01-20 09:17:50 +01:00
init	bpf: Add kconfig knob for disabling unpriv bpf by default	2022-01-05 12:40:34 +01:00
ipc	shm: extend forced shm destroy to support objects from several IPC nses	2021-12-01 09:19:10 +01:00
kernel	perf: Protect perf_guest_cbs with RCU	2022-01-20 09:17:50 +01:00
lib	siphash: use _unaligned version by default	2021-12-08 09:03:23 +01:00
LICENSES
mm	mm: mempolicy: fix THP allocations escaping mempolicy restrictions	2021-12-29 12:26:06 +01:00
net	can: isotp: convert struct tpcon::{idx,len} to unsigned int	2022-01-16 09:14:23 +01:00
samples	ftrace/samples: Add missing prototypes direct functions	2022-01-11 15:25:00 +01:00
scripts	recordmcount.pl: fix typo in s390 mcount regex	2022-01-05 12:40:29 +01:00
security	selinux: initialize proto variable in selinux_ip_postroute_compat()	2022-01-05 12:40:30 +01:00
sound	ALSA: hda/realtek: Re-order quirk entries for Lenovo	2022-01-20 09:17:51 +01:00
tools	selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv()	2022-01-11 15:24:58 +01:00
usr
virt	KVM: downgrade two BUG_ONs to WARN_ON_ONCE	2021-12-22 09:30:50 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	kbuild: generate Module.symvers only when vmlinux exists	2021-05-19 10:12:59 +02:00
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	MAINTAINERS: adjust GCC PLUGINS after gcc-plugin.sh removal	2021-12-14 11:32:46 +01:00
Makefile	Linux 5.10.93	2022-01-20 09:17:52 +01:00
README

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.