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Filename Latest commit message Latest commit date
Hillf Danton 86fd5b27db gfs2: Fix use-after-free in gfs2_glock_shrink_scan
[ Upstream commit 1ab19c5de4c537ec0d9b21020395a5b5a6c059b2 ]

The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to
remove the glock from the lru list in __gfs2_glock_put().

On the shrink scan path, the same flag is cleared under lru_lock but because
of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the
put side can be made without deleting the glock from the lru list.

Keep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to
ensure correct behavior on both sides - clear GLF_LRU after list_del under
lru_lock.

Reported-by: syzbot <syzbot+34ba7ddbf3021981a228@syzkaller.appspotmail.com>
Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-06-18 09:58:59 +02:00
arch riscv: Use -mno-relax when using lld linker 2021-06-18 09:58:58 +02:00
block
certs
crypto
Documentation
drivers HID: gt683r: add missing MODULE_DEVICE_TABLE 2021-06-18 09:58:58 +02:00
fs gfs2: Fix use-after-free in gfs2_glock_shrink_scan 2021-06-18 09:58:59 +02:00
include HID: usbhid: fix info leak in hid_submit_ctrl 2021-06-18 09:58:58 +02:00
init
ipc
kernel tracing: Correct the length check which causes memory corruption 2021-06-16 11:59:46 +02:00
lib
LICENSES
mm
net net: ieee802154: fix null deref in parse dev addr 2021-06-18 09:58:57 +02:00
samples
scripts
security
sound
tools perf session: Correct buffer copying when peeking events 2021-06-16 11:59:45 +02:00
usr
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Makefile Linux 5.4.126 2021-06-16 11:59:46 +02:00
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 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.