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Gao Xiang dcbe6803ff erofs: fix buffer copy overflow of ztailpacking feature I got some KASAN report as below: [ 46.959738] ================================================================== [ 46.960430] BUG: KASAN: use-after-free in z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188 ... [ 46.960430] Call Trace: [ 46.960430] <TASK> [ 46.960430] dump_stack_lvl+0x41/0x5e [ 46.960430] print_report.cold+0xb2/0x6b7 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_report+0x8a/0x140 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_check_range+0x14d/0x1d0 [ 46.960430] memcpy+0x20/0x60 [ 46.960430] z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] z_erofs_decompress_pcluster+0xaae/0x1080 The root cause is that the tail pcluster won't be a complete filesystem block anymore. So if ztailpacking is used, the second part of an uncompressed tail pcluster may not be ``rq->pageofs_out``. Fixes: `ab749badf9` ("erofs: support unaligned data decompression") Fixes: `cecf864d3d` ("erofs: support inline data decompression") Reviewed-by: Yue Hu <huyue2@coolpad.com> Reviewed-by: Chao Yu <chao@kernel.org> Link: https://lore.kernel.org/r/20220512115833.24175-1-hsiangkao@linux.alibaba.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>		2022-05-17 23:38:14 +08:00
arch	powerpc fixes for 5.18 #3	2022-04-24 12:11:20 -07:00
block	block: don't print I/O error warning for dead disks	2022-04-15 06:33:03 -06:00
certs	Kbuild updates for v5.18	2022-03-31 11:59:03 -07:00
crypto	for-5.18/64bit-pi-2022-03-25	2022-03-26 12:01:35 -07:00
Documentation	Fix some syzbot-detected bugs, as well as other bugs found by I/O	2022-04-22 18:18:27 -07:00
drivers	- Read the reported error count from the proper register on synopsys_edac	2022-04-24 11:24:48 -07:00
fs	erofs: fix buffer copy overflow of ztailpacking feature	2022-05-17 23:38:14 +08:00
include	drm fixes for 5.18-rc4 - 2nd part	2022-04-23 09:57:30 -07:00
init	Kbuild updates for v5.18	2022-03-31 11:59:03 -07:00
ipc	fs: allocate inode by using alloc_inode_sb()	2022-03-22 15:57:03 -07:00
kernel	- Fix a corner case when calculating sched runqueue variables	2022-04-24 13:28:06 -07:00
lib	XArray: Disallow sibling entries of nodes	2022-04-22 15:35:40 -04:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	kvmalloc: use vmalloc_huge for vmalloc allocations	2022-04-24 10:05:38 -07:00
net	netlink: reset network and mac headers in netlink_dump()	2022-04-19 15:05:03 +02:00
samples	dma-mapping updates for Linux 5.18	2022-03-29 08:50:14 -07:00
scripts	hardening fixes for v5.18-rc3	2022-04-12 14:29:40 -10:00
security	hardening updates for v5.18-rc1-fix1	2022-03-31 11:43:01 -07:00
sound	ALSA: hda/realtek: Add quirk for Clevo NP70PNP	2022-04-21 21:23:47 +02:00
tools	perf tools fixes for v5.18: 3rd batch	2022-04-23 09:36:23 -07:00
usr	Kbuild updates for v5.18	2022-03-31 11:59:03 -07:00
virt	KVM: SEV: add cache flush to solve SEV cache incoherency issues	2022-04-21 15:41:00 -04:00
.clang-format	genirq/msi: Make interrupt allocation less convoluted	2021-12-16 22:22:20 +01:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	mailmap: update Vasily Averin's email address	2022-04-08 14:20:36 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: replace a Microchip AT91 maintainer	2022-02-09 11:30:01 +01:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	Merge branch 'akpm' (patches from Andrew)	2022-04-22 10:10:43 -07:00
Makefile	Linux 5.18-rc4	2022-04-24 14:51:22 -07:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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 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.