ntfs: (device loop3): parse_options(): NLS character set cp86 not found. Using previous one cp1255.
ntfs: volume version 3.1.
======================================================
WARNING: possible circular locking dependency detected
6.1.119-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.120/4705 is trying to acquire lock:
ffff0000dfeaf510 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154
but task is already holding lock:
ffff0000dfeaf480 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x174/0x2118 fs/ntfs/inode.c:2378
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&rl->lock){++++}-{3:3}:
down_read+0x64/0x308 kernel/locking/rwsem.c:1520
ntfs_read_block fs/ntfs/aops.c:248 [inline]
ntfs_read_folio+0xf40/0x1d70 fs/ntfs/aops.c:436
filemap_read_folio+0x14c/0x39c mm/filemap.c:2489
do_read_cache_folio+0x24c/0x544 mm/filemap.c:3626
do_read_cache_page mm/filemap.c:3668 [inline]
read_cache_page+0x6c/0x180 mm/filemap.c:3677
read_mapping_page include/linux/pagemap.h:791 [inline]
ntfs_map_page fs/ntfs/aops.h:75 [inline]
ntfs_sync_mft_mirror+0x1cc/0x1890 fs/ntfs/mft.c:480
write_mft_record_nolock+0x100c/0x1630 fs/ntfs/mft.c:787
write_mft_record+0x144/0x1bc fs/ntfs/mft.h:95
__ntfs_write_inode+0x5cc/0xa78 fs/ntfs/inode.c:3050
ntfs_write_inode+0x68/0x90 fs/ntfs/super.c:2656
write_inode fs/fs-writeback.c:1460 [inline]
__writeback_single_inode+0x614/0x1770 fs/fs-writeback.c:1677
writeback_sb_inodes+0x978/0x1718 fs/fs-writeback.c:1903
wb_writeback+0x414/0x1130 fs/fs-writeback.c:2077
wb_do_writeback fs/fs-writeback.c:2220 [inline]
wb_workfn+0x3a8/0x1034 fs/fs-writeback.c:2260
process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
-> #0 (&ni->mrec_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x3338/0x7680 kernel/locking/lockdep.c:5049
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154
ntfs_truncate+0x1d4/0x2118 fs/ntfs/inode.c:2383
ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline]
ntfs_setattr+0x260/0x320 fs/ntfs/inode.c:2914
notify_change+0xb58/0xe1c fs/attr.c:499
do_truncate+0x1c0/0x28c fs/open.c:65
vfs_truncate+0x2c4/0x36c fs/open.c:111
do_sys_truncate+0xec/0x1b4 fs/open.c:134
__do_sys_truncate fs/open.c:146 [inline]
__se_sys_truncate fs/open.c:144 [inline]
__arm64_sys_truncate+0x5c/0x70 fs/open.c:144
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rl->lock);
lock(&ni->mrec_lock);
lock(&rl->lock);
lock(&ni->mrec_lock);
*** DEADLOCK ***
3 locks held by syz.3.120/4705:
#0: ffff0000cc2d8460 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393
#1: ffff0000dfeaf7f0 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000dfeaf7f0 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63
#2: ffff0000dfeaf480 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x174/0x2118 fs/ntfs/inode.c:2378
stack backtrace:
CPU: 0 PID: 4705 Comm: syz.3.120 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2048
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x3338/0x7680 kernel/locking/lockdep.c:5049
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154
ntfs_truncate+0x1d4/0x2118 fs/ntfs/inode.c:2383
ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline]
ntfs_setattr+0x260/0x320 fs/ntfs/inode.c:2914
notify_change+0xb58/0xe1c fs/attr.c:499
do_truncate+0x1c0/0x28c fs/open.c:65
vfs_truncate+0x2c4/0x36c fs/open.c:111
do_sys_truncate+0xec/0x1b4 fs/open.c:134
__do_sys_truncate fs/open.c:146 [inline]
__se_sys_truncate fs/open.c:144 [inline]
__arm64_sys_truncate+0x5c/0x70 fs/open.c:144
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585