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Chao Yu b065f398c8 f2fs: fix to do sanity check on .cp_pack_total_block_count commit `5b5b4f85b0` upstream. As bughunter reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215709 f2fs may hang when mounting a fuzzed image, the dmesg shows as below: __filemap_get_folio+0x3a9/0x590 pagecache_get_page+0x18/0x60 __get_meta_page+0x95/0x460 [f2fs] get_checkpoint_version+0x2a/0x1e0 [f2fs] validate_checkpoint+0x8e/0x2a0 [f2fs] f2fs_get_valid_checkpoint+0xd0/0x620 [f2fs] f2fs_fill_super+0xc01/0x1d40 [f2fs] mount_bdev+0x18a/0x1c0 f2fs_mount+0x15/0x20 [f2fs] legacy_get_tree+0x28/0x50 vfs_get_tree+0x27/0xc0 path_mount+0x480/0xaa0 do_mount+0x7c/0xa0 __x64_sys_mount+0x8b/0xe0 do_syscall_64+0x38/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is cp_pack_total_block_count field in checkpoint was fuzzed to one, as calcuated, two cp pack block locates in the same block address, so then read latter cp pack block, it will block on the page lock due to the lock has already held when reading previous cp pack block, fix it by adding sanity check for cp_pack_total_block_count. Cc: stable@vger.kernel.org Signed-off-by: Chao Yu <chao.yu@oppo.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-04-08 14:22:52 +02:00
arch	ARM: mstar: Select HAVE_ARM_ARCH_TIMER	2022-04-08 14:22:46 +02:00
block	block: release rq qos structures for queue without disk	2022-03-23 09:16:41 +01:00
certs	certs: Add support for using elliptic curve keys for signing modules	2021-08-23 19:55:42 +03:00
crypto	KEYS: asymmetric: properly validate hash_algo and encoding	2022-04-08 14:22:51 +02:00
Documentation	Documentation: update stable tree link	2022-04-08 14:22:51 +02:00
drivers	HID: intel-ish-hid: Use dma_alloc_coherent for firmware update	2022-04-08 14:22:51 +02:00
fs	f2fs: fix to do sanity check on .cp_pack_total_block_count	2022-04-08 14:22:52 +02:00
include	NFSD: prevent integer overflow on 32 bit systems	2022-04-08 14:22:52 +02:00
init	init: make unknown command line param message clearer	2021-11-18 19:17:11 +01:00
ipc	ipc/sem: do not sleep with a spin lock held	2022-02-08 18:34:03 +01:00
kernel	ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE	2022-04-08 14:22:50 +02:00
lib	ARM: 9178/1: fix unmet dependency on BITREVERSE for HAVE_ARCH_BITREVERSE	2022-03-19 13:47:48 +01:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm: kfence: fix missing objcg housekeeping for SLAB	2022-04-08 14:22:46 +02:00
net	SUNRPC: avoid race between mod_timer() and del_timer_sync()	2022-04-08 14:22:52 +02:00
samples	samples: bpf: Fix 'unknown warning group' build warning on Clang	2022-01-27 11:03:29 +01:00
scripts	kconfig: fix failing to generate auto.conf	2022-02-23 12:03:20 +01:00
security	KEYS: fix length validation in keyctl_pkey_params_get_2()	2022-04-08 14:22:51 +02:00
sound	ALSA: pci: fix reading of swapped values from pcmreg in AC97 codec	2022-03-28 09:58:44 +02:00
tools	selftests: vm: fix clang build error multiple output files	2022-04-08 14:22:48 +02:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:27:15 +01:00
virt	KVM: Fix lockdep false negative during host resume	2022-03-16 14:23:40 +01:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.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: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
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	MAINTAINERS: adjust file entry for of_net.c after movement	2022-03-08 19:12:53 +01:00
Makefile	Linux 5.15.32	2022-03-28 09:58:46 +02:00
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.