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Filename Latest commit message Latest commit date
Tetsuo Handa 07191f9848 cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()
commit 43626dade36fa74d3329046f4ae2d7fdefe401c6 upstream.

syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at
cpuset_attach() [1], for commit 4f7e7236435ca0ab ("cgroup: Fix
threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that
cpuset_attach() is also called from cgroup_attach_task_all().
Add cpus_read_lock() like what cgroup_procs_write_start() does.

Link: https://syzkaller.appspot.com/bug?extid=29d3a3b4d86c8136ad9e [1]
Reported-by: syzbot <syzbot+29d3a3b4d86c8136ad9e@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 4f7e7236435ca0ab ("cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock")
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-28 11:03:59 +02:00
arch MIPS: OCTEON: irq: Fix octeon_irq_force_ciu_mapping() 2022-09-28 11:03:59 +02:00
block
certs
crypto
Documentation
drivers video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write 2022-09-28 11:03:59 +02:00
fs afs: Return -EAGAIN, not -EREMOTEIO, when a file already locked 2022-09-28 11:03:59 +02:00
include iomap: iomap that extends beyond EOF should be marked dirty 2022-09-28 11:03:58 +02:00
init
ipc
kernel cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() 2022-09-28 11:03:59 +02:00
lib
LICENSES
mm
net rxrpc: Fix calc of resend age 2022-09-28 11:03:58 +02:00
samples
scripts mksysmap: Fix the mismatch of 'L0' symbols in System.map 2022-09-28 11:03:59 +02:00
security
sound ALSA: hda/tegra: Align BDL entry to 4KB boundary 2022-09-28 11:03:59 +02:00
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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.