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Sheng Yong b6a5543fdf f2fs: fix bio memleak when committing super block 
[ Upstream commit 554d9b7242 ]

When committing new super block, bio is allocated but not freed, and
kmemleak complains:

  unreferenced object 0xffff88801d185600 (size 192):
    comm "kworker/3:2", pid 128, jiffies 4298624992
    hex dump (first 32 bytes):
      00 00 00 00 00 00 00 00 80 67 c3 00 81 88 ff ff  .........g......
      01 08 06 00 00 00 00 00 00 00 00 00 01 00 00 00  ................
    backtrace (crc 650ecdb1):
      kmem_cache_alloc_noprof+0x3a9/0x460
      mempool_alloc_noprof+0x12f/0x310
      bio_alloc_bioset+0x1e2/0x7e0
      __f2fs_commit_super+0xe0/0x370
      f2fs_commit_super+0x4ed/0x8c0
      f2fs_record_error_work+0xc7/0x190
      process_one_work+0x7db/0x1970
      worker_thread+0x518/0xea0
      kthread+0x359/0x690
      ret_from_fork+0x34/0x70
      ret_from_fork_asm+0x1a/0x30

The issue can be reproduced by:

  mount /dev/vda /mnt
  i=0
  while :; do
      echo '[h]abc' > /sys/fs/f2fs/vda/extension_list
      echo '[h]!abc' > /sys/fs/f2fs/vda/extension_list
      echo scan > /sys/kernel/debug/kmemleak
      dmesg | grep "new suspected memory leaks"
      [ $? -eq 0 ] && break
      i=$((i + 1))
      echo "$i"
  done
  umount /mnt

Fixes: 5bcde45578 ("f2fs: get rid of buffer_head use")
Signed-off-by: Sheng Yong <shengyong1@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-08-15 16:39:18 +02:00
arch sh: Do not use hyphen in exported variable name 2025-08-15 16:39:12 +02:00
block block: restore two stage elevator switch while running nr_hw_queue update 2025-08-15 16:38:24 +02:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: krb5 - Fix memory leak in krb5_test_one_prf() 2025-08-15 16:39:10 +02:00
Documentation cgroup: Add compatibility option for content of /proc/cgroups 2025-08-15 16:39:10 +02:00
drivers rtc: rv3028: fix incorrect maximum clock rate handling 2025-08-15 16:39:17 +02:00
fs f2fs: fix bio memleak when committing super block 2025-08-15 16:39:18 +02:00
include module: Restore the moduleparam prefix length check 2025-08-15 16:39:16 +02:00
init io_uring: fix breakage in EXPERT menu 2025-08-15 16:38:23 +02:00
io_uring io_uring-6.16-20250718 2025-07-18 12:21:26 -07:00
ipc - The 3 patch series "hung_task: extend blocking task stacktrace dump to 2025-05-31 19:12:53 -07:00
kernel ucount: fix atomic_long_inc_below() argument type 2025-08-15 16:39:17 +02:00
lib kunit/fortify: Add back "volatile" for sizeof() constants 2025-08-15 16:38:22 +02:00
LICENSES LICENSES: add CC0-1.0 license text 2025-05-21 14:54:17 +02:00
mm slub: Fix a documentation build error for krealloc() 2025-08-15 16:38:38 +02:00
net bpf: Check netfilter ctx accesses are aligned 2025-08-15 16:39:15 +02:00
rust rust: miscdevice: clarify invariant for MiscDeviceRegistration 2025-08-15 16:38:30 +02:00
samples samples: mei: Fix building on musl libc 2025-08-15 16:38:34 +02:00
scripts scripts: gdb: move MNT_* constants to gdb-parsed 2025-08-15 16:39:16 +02:00
security apparmor: Fix unaligned memory accesses in KUnit test 2025-08-15 16:39:16 +02:00
sound ALSA: usb: scarlett2: Fix missing NULL check 2025-08-15 16:39:13 +02:00
tools perf record: Cache build-ID of hit DSOs only 2025-08-15 16:39:14 +02:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
virt KVM: Allow CPU to reschedule while setting per-page memory attributes 2025-06-24 12:20:17 -07:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore gitignore: allow .pylintrc to be tracked 2025-08-15 16:39:03 +02:00
.mailmap 11 hotfixes. 9 are cc:stable and the remainder address post-6.15 issues 2025-07-24 19:13:30 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml
COPYING
CREDITS mm: update MAINTAINERS entry for HMM 2025-07-19 19:26:16 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS 11 hotfixes. 9 are cc:stable and the remainder address post-6.15 issues 2025-07-24 19:13:30 -07:00
Makefile Linux 6.16 2025-07-27 14:26:38 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.