linux-kernel - [PATCH v2 0/2] f2fs: Add sanity checks before unlinking and loading inodes

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Message-ID: <cover.1761993022.git.zlatistiv@gmail.com>
Date: Sat,  1 Nov 2025 14:56:14 +0200
From: "Nikola Z. Ivanov" <zlatistiv@...il.com>
To: jaegeuk@...nel.org,
	chao@...nel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org,
	david.hunter.linux@...il.com,
	linux-kernel-mentees@...ts.linuxfoundation.org,
	khalid@...nel.org,
	"Nikola Z. Ivanov" <zlatistiv@...il.com>
Subject: [PATCH v2 0/2] f2fs: Add sanity checks before unlinking and loading inodes

This series is provoked by syzbot warnings caused by corrupted directory
inode with i_nlink == 1 that passes the initial sanity check which will
only mark the filesystem as corrupted in case i_nlink == 0.

Tests:
- fio/fsmark parallel create/unlink on VM with f2fs root filesystem.
- syzbot

Changelog:
Changes from v1:
- Rename exit label in f2fs_unlink().
- Add sanity check in sanity_check_inode() and remove it from f2fs_iget().
  as suggested by Chao Yu in order to detect on-disk corruption early.
https://lore.kernel.org/linux-f2fs-devel/d4b7c03c-6554-4407-b823-aecfcdf7dc3f@kernel.org/T/#t

Nikola Z. Ivanov (2):
  f2fs: Rename f2fs_unlink exit label
  f2fs: Add sanity checks before unlinking and loading  inodes

 fs/f2fs/inode.c | 10 ++++++++++
 fs/f2fs/namei.c | 27 +++++++++++++++++----------
 2 files changed, 27 insertions(+), 10 deletions(-)

-- 
2.51.0