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Yangtao Li 22ddbbff11 f2fs: fix to avoid potential memory corruption in __update_iostat_latency() 
[ Upstream commit 0dbbf0fb38 ]

Add iotype sanity check to avoid potential memory corruption.
This is to fix the compile error below:

fs/f2fs/iostat.c:231 __update_iostat_latency() error: buffer overflow
'io_lat->peak_lat[type]' 3 <= 3

vim +228 fs/f2fs/iostat.c

  211  static inline void __update_iostat_latency(struct bio_iostat_ctx
	*iostat_ctx,
  212					enum iostat_lat_type type)
  213  {
  214		unsigned long ts_diff;
  215		unsigned int page_type = iostat_ctx->type;
  216		struct f2fs_sb_info *sbi = iostat_ctx->sbi;
  217		struct iostat_lat_info *io_lat = sbi->iostat_io_lat;
  218		unsigned long flags;
  219
  220		if (!sbi->iostat_enable)
  221			return;
  222
  223		ts_diff = jiffies - iostat_ctx->submit_ts;
  224		if (page_type >= META_FLUSH)
                                 ^^^^^^^^^^

  225			page_type = META;
  226
  227		spin_lock_irqsave(&sbi->iostat_lat_lock, flags);
 @228		io_lat->sum_lat[type][page_type] += ts_diff;
                                      ^^^^^^^^^
Mixup between META_FLUSH and NR_PAGE_TYPE leads to memory corruption.

Fixes: a4b6817625 ("f2fs: introduce periodic iostat io latency traces")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Suggested-by: Chao Yu <chao@kernel.org>
Suggested-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-03-11 13:55:21 +01:00
arch um: vector: Fix memory leak in vector_config 2023-03-11 13:55:19 +01:00
block Revert "blk-cgroup: dropping parent refcount after pd_free_fn() is done" 2023-03-11 11:03:45 +01:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: rsa-pkcs1pad - Use akcipher_request_complete 2023-03-10 09:33:03 +01:00
Documentation mm: memcontrol: deprecate charge moving 2023-03-10 09:34:26 +01:00
drivers ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed 2023-03-11 13:55:21 +01:00
fs f2fs: fix to avoid potential memory corruption in __update_iostat_latency() 2023-03-11 13:55:21 +01:00
include f2fs: introduce trace_f2fs_replace_atomic_write_block 2023-03-11 13:55:17 +01:00
init gcc: disable -Warray-bounds for gcc-11 too 2023-01-14 10:33:43 +01:00
io_uring io_uring: mark task TASK_RUNNING before handling resume/task work 2023-03-10 09:34:07 +01:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel wait: Return number of exclusive waiters awaken 2023-03-10 09:34:34 +01:00
lib sbitmap: Try each queue to wake up at least one waiter 2023-03-10 09:34:34 +01:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm memory tier: release the new_memtier in find_create_memory_tier() 2023-03-10 09:34:27 +01:00
net net/sched: Retire tcindex classifier 2023-03-11 13:55:16 +01:00
rust rust: print: avoid evaluating arguments in pr_* macros in unsafe blocks 2023-02-06 08:06:34 +01:00
samples ftrace: Export ftrace_free_filter() to modules 2023-02-01 08:34:37 +01:00
scripts gcc-plugins: drop -std=gnu++11 to fix GCC 13 build 2023-03-10 09:33:51 +01:00
security ima: Align ima_file_mmap() parameters with mmap_file LSM hook 2023-03-10 09:34:15 +01:00
sound ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC 2023-03-10 09:34:20 +01:00
tools objtool: Fix memory leak in create_static_call_sections() 2023-03-11 13:55:17 +01:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Register /dev/kvm as the _very_ last thing during initialization 2023-03-10 09:34:11 +01:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS audit: update the mailing list in MAINTAINERS 2023-02-25 11:25:42 +01:00
Makefile Linux 6.1.17 2023-03-11 11:03:45 +01:00
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.