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Filename Latest commit message Latest commit date
Tetsuo Handa d186c65599 Input: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag 
commit 98e01215708b6d416345465c09dce2bd4868c67a upstream.

syzbot is reporting hung task at __input_unregister_device() [1], for
iforce_close() waiting at wait_event_interruptible() with dev->mutex held
is blocking input_disconnect_device() from __input_unregister_device().

It seems that the cause is simply that commit c2b27ef672 ("Input:
iforce - wait for command completion when closing the device") forgot to
call wake_up() after clear_bit().

Fix this problem by introducing a helper that calls clear_bit() followed
by wake_up_all().

Reported-by: syzbot <syzbot+deb6abc36aad4008f407@syzkaller.appspotmail.com>
Fixes: c2b27ef672 ("Input: iforce - wait for command completion when closing the device")
Tested-by: syzbot <syzbot+deb6abc36aad4008f407@syzkaller.appspotmail.com>
Suggested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Co-developed-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/r/887021c3-4f13-40ce-c8b9-aa6e09faa3a7@I-love.SAKURA.ne.jp
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-15 12:04:51 +02:00
arch powerpc: align syscall table for ppc32 2022-09-15 12:04:51 +02:00
block
certs
crypto
Documentation
drivers Input: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag 2022-09-15 12:04:51 +02:00
fs io_uring: disable polling pollfree files 2022-09-05 10:27:47 +02:00
include platform/x86: pmc_atom: Fix SLP_TYPx bitfield mask 2022-09-15 12:04:50 +02:00
init
ipc
kernel kprobes: don't call disarm_kprobe() for disabled kprobes 2022-09-05 10:27:47 +02:00
lib
LICENSES
mm Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()" 2022-09-15 12:04:49 +02:00
net net/smc: Remove redundant refcount increase 2022-09-15 12:04:50 +02:00
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Makefile Linux 5.4.212 2022-09-05 10:27:48 +02:00
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.