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Chao Yu c4029044cc f2fs: fix to do sanity check on ino and xnid [ Upstream commit `061cf3a84b` ] syzbot reported a f2fs bug as below: INFO: task syz-executor140:5308 blocked for more than 143 seconds. Not tainted 6.14.0-rc7-syzkaller-00069-g81e4f8d68c66 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor140 state:D stack:24016 pid:5308 tgid:5308 ppid:5306 task_flags:0x400140 flags:0x00000006 Call Trace: <TASK> context_switch kernel/sched/core.c:5378 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6857 io_schedule+0x8d/0x110 kernel/sched/core.c:7690 folio_wait_bit_common+0x839/0xee0 mm/filemap.c:1317 __folio_lock mm/filemap.c:1664 [inline] folio_lock include/linux/pagemap.h:1163 [inline] __filemap_get_folio+0x147/0xb40 mm/filemap.c:1917 pagecache_get_page+0x2c/0x130 mm/folio-compat.c:87 find_get_page_flags include/linux/pagemap.h:842 [inline] f2fs_grab_cache_page+0x2b/0x320 fs/f2fs/f2fs.h:2776 __get_node_page+0x131/0x11b0 fs/f2fs/node.c:1463 read_xattr_block+0xfb/0x190 fs/f2fs/xattr.c:306 lookup_all_xattrs fs/f2fs/xattr.c:355 [inline] f2fs_getxattr+0x676/0xf70 fs/f2fs/xattr.c:533 __f2fs_get_acl+0x52/0x870 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:375 [inline] f2fs_init_acl+0xd7/0x9b0 fs/f2fs/acl.c:418 f2fs_init_inode_metadata+0xa0f/0x1050 fs/f2fs/dir.c:539 f2fs_add_inline_entry+0x448/0x860 fs/f2fs/inline.c:666 f2fs_add_dentry+0xba/0x1e0 fs/f2fs/dir.c:765 f2fs_do_add_link+0x28c/0x3a0 fs/f2fs/dir.c:808 f2fs_add_link fs/f2fs/f2fs.h:3616 [inline] f2fs_mknod+0x2e8/0x5b0 fs/f2fs/namei.c:766 vfs_mknod+0x36d/0x3b0 fs/namei.c:4191 unix_bind_bsd net/unix/af_unix.c:1286 [inline] unix_bind+0x563/0xe30 net/unix/af_unix.c:1379 __sys_bind_socket net/socket.c:1817 [inline] __sys_bind+0x1e4/0x290 net/socket.c:1848 __do_sys_bind net/socket.c:1853 [inline] __se_sys_bind net/socket.c:1851 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1851 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Let's dump and check metadata of corrupted inode, it shows its xattr_nid is the same to its i_ino. dump.f2fs -i 3 chaseyu.img.raw i_xattr_nid [0x 3 : 3] So that, during mknod in the corrupted directory, it tries to get and lock inode page twice, result in deadlock. - f2fs_mknod - f2fs_add_inline_entry - f2fs_get_inode_page --- lock dir's inode page - f2fs_init_acl - f2fs_acl_create(dir,..) - __f2fs_get_acl - f2fs_getxattr - lookup_all_xattrs - __get_node_page --- try to lock dir's inode page In order to fix this, let's add sanity check on ino and xnid. Cc: stable@vger.kernel.org Reported-by: syzbot+cc448dcdc7ae0b4e4ffa@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-f2fs-devel/67e06150.050a0220.21942d.0005.GAE@google.com Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> [ add set_sbi_flag(sbi, SBI_NEED_FSCK) to match error handling pattern ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-08-28 16:24:31 +02:00
arch	ARM: 9448/1: Use an absolute path to unified.h in KBUILD_AFLAGS	2025-08-28 16:24:30 +02:00
block	block: avoid possible overflow for chunk_sectors check in blk_stack_limits()	2025-08-28 16:24:25 +02:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:22:01 +02:00
crypto	crypto: xts - Only add ecb if it is not already there	2025-06-27 11:05:10 +01:00
Documentation	Documentation: ACPI: Fix parent device references	2025-08-28 16:24:15 +02:00
drivers	drm/sched: Remove optimization that causes hang when killing dependent jobs	2025-08-28 16:24:30 +02:00
fs	f2fs: fix to do sanity check on ino and xnid	2025-08-28 16:24:31 +02:00
include	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:24:30 +02:00
init	sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP	2025-05-02 07:44:36 +02:00
io_uring	io_uring: fix possible deadlock in io_register_iowq_max_workers()	2024-11-17 15:06:25 +01:00
ipc	ipc: fix to protect IPCS lookups using RCU	2025-06-27 11:05:26 +01:00
kernel	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:24:30 +02:00
lib	lib: bitmap: Introduce node-aware alloc API	2025-08-28 16:24:02 +02:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:24:30 +02:00
net	sch_qfq: make qfq_qlen_notify() idempotent	2025-08-28 16:24:30 +02:00
samples	samples: mei: Fix building on musl libc	2025-08-28 16:24:07 +02:00
scripts	kconfig: lxdialog: fix 'space' to (de)select options	2025-08-28 16:24:25 +02:00
security	securityfs: don't pin dentries twice, once is enough...	2025-08-28 16:24:17 +02:00
sound	ASoC: fsl_sai: replace regmap_write with regmap_update_bits	2025-08-28 16:24:26 +02:00
tools	selftests/memfd: add test for mapping write-sealed memfd read-only	2025-08-28 16:24:30 +02:00
usr	kbuild: hdrcheck: fix cross build with clang	2025-06-27 11:05:22 +01:00
virt	KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()	2024-10-22 15:40:41 +02:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Remove *.orig pattern from .gitignore	2024-10-17 15:11:10 +02:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	trace: Relocate event helper files	2024-04-10 16:19:24 +02:00
Makefile	Linux 5.15.189	2025-07-17 18:30:55 +02:00
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README

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