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Luiz Augusto von Dentz cac34e4428 Bluetooth: MGMT: Fix possible deadlocks [ Upstream commit `a66dfaf18f` ] This fixes possible deadlocks like the following caused by hci_cmd_sync_dequeue causing the destroy function to run: INFO: task kworker/u19:0:143 blocked for more than 120 seconds. Tainted: G W O 6.8.0-2024-03-19-intel-next-iLS-24ww14 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u19:0 state:D stack:0 pid:143 tgid:143 ppid:2 flags:0x00004000 Workqueue: hci0 hci_cmd_sync_work [bluetooth] Call Trace: <TASK> __schedule+0x374/0xaf0 schedule+0x3c/0xf0 schedule_preempt_disabled+0x1c/0x30 __mutex_lock.constprop.0+0x3ef/0x7a0 __mutex_lock_slowpath+0x13/0x20 mutex_lock+0x3c/0x50 mgmt_set_connectable_complete+0xa4/0x150 [bluetooth] ? kfree+0x211/0x2a0 hci_cmd_sync_dequeue+0xae/0x130 [bluetooth] ? __pfx_cmd_complete_rsp+0x10/0x10 [bluetooth] cmd_complete_rsp+0x26/0x80 [bluetooth] mgmt_pending_foreach+0x4d/0x70 [bluetooth] __mgmt_power_off+0x8d/0x180 [bluetooth] ? _raw_spin_unlock_irq+0x23/0x40 hci_dev_close_sync+0x445/0x5b0 [bluetooth] hci_set_powered_sync+0x149/0x250 [bluetooth] set_powered_sync+0x24/0x60 [bluetooth] hci_cmd_sync_work+0x90/0x150 [bluetooth] process_one_work+0x13e/0x300 worker_thread+0x2f7/0x420 ? __pfx_worker_thread+0x10/0x10 kthread+0x107/0x140 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x3d/0x60 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK> Tested-by: Kiran K <kiran.k@intel.com> Fixes: `f53e1c9c72` ("Bluetooth: MGMT: Fix possible crash on mgmt_index_removed") Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2024-12-05 14:02:35 +01:00
arch	LoongArch: BPF: Sign-extend return values	2024-12-05 14:02:29 +01:00
block	block: fix bio_split_rw_at to take zone_write_granularity into account	2024-12-05 14:01:14 +01:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: pcrypt - Call crypto layer directly when padata_do_parallel() return -EBUSY	2024-12-05 14:01:18 +01:00
Documentation	fs_parser: update mount_api doc to match function signature	2024-12-05 14:02:29 +01:00
drivers	bnxt_en: Unregister PTP during PCI shutdown and suspend	2024-12-05 14:02:34 +01:00
fs	exfat: fix file being changed by unaligned direct write	2024-12-05 14:02:31 +01:00
include	f2fs: fix to do cast in F2FS_{BLK_TO_BYTES, BTYES_TO_BLK} to avoid overflow	2024-12-05 14:02:27 +01:00
init	initramfs: avoid filename buffer overrun	2024-12-05 14:01:12 +01:00
io_uring	io_uring/rw: fix missing NOWAIT check for O_DIRECT start write	2024-10-31 08:21:02 -06:00
ipc	struct fd layout change (and conversion to accessor helpers)	2024-09-23 09:35:36 -07:00
kernel	trace/trace_event_perf: remove duplicate samples on the first tracepoint event	2024-12-05 14:02:02 +01:00
lib	kasan: move checks to do_strncpy_from_user	2024-12-05 14:02:12 +01:00
LICENSES	LICENSES: add 0BSD license text	2024-09-01 20:43:24 -07:00
mm	mm/mmap: fix __mmap_region() error handling in rare merge failure case	2024-11-22 15:30:26 +01:00
net	Bluetooth: MGMT: Fix possible deadlocks	2024-12-05 14:02:35 +01:00
rust	rust: block: fix formatting of `kernel::block::mq::request` module	2024-12-05 14:02:21 +01:00
samples	bpf: Fix the xdp_adjust_tail sample prog issue	2024-12-05 14:01:42 +01:00
scripts	checkpatch: always parse orig_commit in fixes tag	2024-12-05 14:02:09 +01:00
security	integrity-v6.12	2024-11-12 13:06:31 -08:00
sound	ALSA: 6fire: Release resources at card release	2024-12-05 14:01:58 +01:00
tools	selftests/mount_setattr: Fix failures on 64K PAGE_SIZE kernels	2024-12-05 14:02:28 +01:00
usr	initramfs: shorten cmd_initfs in usr/Makefile	2024-07-16 01:07:52 +09:00
virt	ARM64:	2024-10-21 11:22:04 -07:00
.clang-format	clang-format: Update with v6.11-rc1's `for_each` macro list	2024-08-02 13:20:31 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.editorconfig	.editorconfig: remove trim_trailing_whitespace option	2024-06-13 16:47:52 +02:00
.get_maintainer.ignore	Add Jeff Kirsher to .get_maintainer.ignore	2024-03-08 11:36:54 +00:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	Kbuild updates for v6.12	2024-09-24 13:02:06 -07:00
.mailmap	mailmap: add entry for Thorsten Blum	2024-11-07 14:14:59 -08:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Remove self from DSA entry	2024-11-03 12:52:38 -08:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	MAINTAINERS: appoint myself the XFS maintainer for 6.12 LTS	2024-12-05 14:01:10 +01:00
Makefile	Linux 6.12.1	2024-11-22 15:30:26 +01:00
README	README: Fix spelling	2024-03-18 03:36:32 -06:00

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 reStructuredText 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.