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Hans de Goede 209850f177 drivers: staging: rtl8723bs: Fix locking in _rtw_join_timeout_handler() [ Upstream commit `215792eda0` ] Commit `041879b12d` ("drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle()") besides fixing the deadlock also modified _rtw_join_timeout_handler() to use spin_[un]lock_irq() instead of spin_[un]lock_bh(). _rtw_join_timeout_handler() calls rtw_do_join() which takes pmlmepriv->scanned_queue.lock using spin_[un]lock_bh(). This spin_unlock_bh() call re-enables softirqs which triggers an oops in kernel/softirq.c: __local_bh_enable_ip() when it calls lockdep_assert_irqs_enabled(): [ 244.506087] WARNING: CPU: 2 PID: 0 at kernel/softirq.c:376 __local_bh_enable_ip+0xa6/0x100 ... [ 244.509022] Call Trace: [ 244.509048] <IRQ> [ 244.509100] _rtw_join_timeout_handler+0x134/0x170 [r8723bs] [ 244.509468] ? __pfx__rtw_join_timeout_handler+0x10/0x10 [r8723bs] [ 244.509772] ? __pfx__rtw_join_timeout_handler+0x10/0x10 [r8723bs] [ 244.510076] call_timer_fn+0x95/0x2a0 [ 244.510200] __run_timers.part.0+0x1da/0x2d0 This oops is causd by the switch to spin_[un]lock_irq() which disables the IRQs for the entire duration of _rtw_join_timeout_handler(). Disabling the IRQs is not necessary since all code taking this lock runs from either user contexts or from softirqs, switch back to spin_[un]lock_bh() to fix this. Fixes: `041879b12d` ("drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle()") Cc: Duoming Zhou <duoming@zju.edu.cn> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20230221145326.7808-1-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-11 23:00:31 +09:00
arch	arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step	2023-05-11 23:00:24 +09:00
block	blk-crypto: make blk_crypto_evict_key() more robust	2023-05-11 23:00:16 +09:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:22:01 +02:00
crypto	crypto: drbg - Only fail when jent is unavailable in FIPS mode	2023-05-11 23:00:27 +09:00
Documentation	riscv: Move early dtb mapping into the fixmap region	2023-05-01 08:23:24 +09:00
drivers	drivers: staging: rtl8723bs: Fix locking in _rtw_join_timeout_handler()	2023-05-11 23:00:31 +09:00
fs	jdb2: Don't refuse invalidation of already invalidated buffers	2023-05-11 23:00:29 +09:00
include	netfilter: nf_tables: don't write table validation state without mutex	2023-05-11 23:00:30 +09:00
init	kbuild: Add CONFIG_PAHOLE_VERSION	2023-02-25 12:06:45 +01:00
io_uring	io_uring: avoid null-ptr-deref in io_arm_poll_handler	2023-03-22 13:31:37 +01:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2022-12-08 11:28:45 +01:00
kernel	bpf: Don't EFAULT for getsockopt with optval=NULL	2023-05-11 23:00:30 +09:00
lib	debugobject: Prevent init race with static objects	2023-05-11 23:00:25 +09:00
LICENSES
mm	writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs	2023-05-11 23:00:18 +09:00
net	tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.	2023-05-11 23:00:31 +09:00
samples	samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe()	2022-12-31 13:14:31 +01:00
scripts	ASN.1: Fix check for strdup() success	2023-04-26 13:51:56 +02:00
security	selinux: ensure av_permissions.h is built when needed	2023-05-11 23:00:19 +09:00
sound	sound/oss/dmasound: fix build when drivers are mixed =y/=m	2023-05-11 23:00:19 +09:00
tools	selftests/bpf: Fix leaked bpf_link in get_stackid_cannot_attach	2023-05-11 23:00:28 +09:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:27:15 +01:00
virt	KVM: fix memoryleak in kvm_init()	2023-03-17 08:49:04 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	counter: Internalize sysfs interface code	2023-04-20 12:13:55 +02:00
Makefile	Linux 5.15.110	2023-05-01 08:23:24 +09:00
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.