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Alan Stern ab062fa3dc USB: core: Fix deadlock in usb_deauthorize_interface() commit `80ba43e9f7` upstream. Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219@gmail.com> Reported by: xingwei lee <xrivendell7@gmail.com> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Link: https://lore.kernel.org/linux-usb/CAEkJfYO6jRVC8Tfrd_R=cjO0hguhrV31fDPrLrNOOHocDkPoAA@mail.gmail.com/#r Fixes: `310d2b4124` ("usb: interface authorization: SysFS part of USB interface authorization") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1c37eea1-9f56-4534-b9d8-b443438dc869@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-04-03 15:19:55 +02:00
arch	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-04-03 15:19:55 +02:00
block	block: Do not force full zone append completion in req_bio_endio()	2024-04-03 15:19:49 +02:00
certs	certs: Fix build error when PKCS#11 URI contains semicolon	2023-02-09 11:28:11 +01:00
crypto	crypto: jitter - fix CRYPTO_JITTERENTROPY help text	2024-03-26 18:20:50 -04:00
Documentation	x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled	2024-04-03 15:19:54 +02:00
drivers	USB: core: Fix deadlock in usb_deauthorize_interface()	2024-04-03 15:19:55 +02:00
fs	exec: Fix NOMMU linux_binprm::exec in transfer_args_to_stack()	2024-04-03 15:19:48 +02:00
include	scsi: sd: Fix TCG OPAL unlock on system resume	2024-04-03 15:19:51 +02:00
init	init: open /initrd.image with O_LARGEFILE	2024-04-03 15:19:47 +02:00
io_uring	io_uring/net: correctly handle multishot recvmsg retry setup	2024-04-03 15:19:33 +02:00
ipc	ipc: fix memory leak in init_mqueue_fs()	2022-12-31 13:32:01 +01:00
kernel	printk: Update @console_may_schedule in console_trylock_spinning()	2024-04-03 15:19:44 +02:00
lib	pci_iounmap(): Fix MMIO mapping leak	2024-04-03 15:19:25 +02:00
LICENSES
mm	mm/migrate: set swap entry values of THP tail pages properly.	2024-04-03 15:19:47 +02:00
net	tls: fix use-after-free on failed backlog decryption	2024-04-03 15:19:54 +02:00
rust	rust: allocator: Prevent mis-aligned allocation	2023-08-11 12:08:18 +02:00
samples	work around gcc bugs with 'asm goto' with outputs	2024-02-23 09:12:28 +01:00
scripts	kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1	2024-04-03 15:19:34 +02:00
security	landlock: Warn once if a Landlock action is requested while disabled	2024-04-03 15:19:32 +02:00
sound	ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs	2024-04-03 15:19:50 +02:00
tools	selftests: mptcp: diag: return KSFT_FAIL not test_cnt	2024-04-03 15:19:46 +02:00
usr	usr/gen_init_cpio.c: remove unnecessary -1 values from int file	2022-10-03 14:21:44 -07:00
virt	KVM: Always flush async #PF workqueue when vCPU is being destroyed	2024-04-03 15:19:25 +02:00
.clang-format	inet: ping: use hlist_nulls rcu iterator during lookup	2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
.mailmap	9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address	2022-12-10 17:10:52 -08:00
.rustfmt.toml
COPYING
CREDITS	MAINTAINERS: Remove Michal Marek from Kbuild maintainers	2022-11-16 14:53:00 +09:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS	trace: Relocate event helper files	2024-03-06 14:45:17 +00:00
Makefile	Linux 6.1.83	2024-03-26 18:22:57 -04:00
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.