======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0 Not tainted
------------------------------------------------------
syz-executor.3/5817 is trying to acquire lock:
ffff88804f61dc50 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
but task is already holding lock:
ffff88804f61dbc0 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x1e8/0x2a20 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+0x9a/0x330 kernel/locking/rwsem.c:1526
ntfs_read_block fs/ntfs/aops.c:242 [inline]
ntfs_read_folio+0x1a98/0x2430 fs/ntfs/aops.c:430
filemap_read_folio+0xe9/0x2c0 mm/filemap.c:2323
do_read_cache_folio+0x205/0x540 mm/filemap.c:3700
do_read_cache_page mm/filemap.c:3766 [inline]
read_cache_page+0x5b/0x160 mm/filemap.c:3775
read_mapping_page include/linux/pagemap.h:871 [inline]
ntfs_map_page fs/ntfs/aops.h:75 [inline]
ntfs_sync_mft_mirror+0x242/0x1ed0 fs/ntfs/mft.c:480
write_mft_record_nolock+0x1977/0x1da0 fs/ntfs/mft.c:787
write_mft_record+0x14b/0x380 fs/ntfs/mft.h:95
__ntfs_write_inode+0x91b/0xc30 fs/ntfs/inode.c:3052
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0xa91/0xe90 fs/fs-writeback.c:1690
writeback_sb_inodes+0x599/0x1080 fs/fs-writeback.c:1916
wb_writeback+0x2a5/0xaa0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x29c/0xfe0 fs/fs-writeback.c:2279
process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
process_scheduled_works kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
-> #0 (&ni->mrec_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747
map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
ntfs_truncate+0x263/0x2a20 fs/ntfs/inode.c:2383
ntfs_truncate_vfs fs/ntfs/inode.c:2864 [inline]
ntfs_setattr+0x44d/0x640 fs/ntfs/inode.c:2916
notify_change+0x742/0x11c0 fs/attr.c:499
do_truncate+0x15c/0x220 fs/open.c:66
handle_truncate fs/namei.c:3280 [inline]
do_open fs/namei.c:3626 [inline]
path_openat+0x2597/0x2c50 fs/namei.c:3779
do_filp_open+0x1de/0x430 fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_creat fs/open.c:1528 [inline]
__se_sys_creat fs/open.c:1522 [inline]
__ia32_sys_creat+0xcc/0x120 fs/open.c:1522
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:321
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
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-executor.3/5817:
#0: ffff8880253a2418 (sb_writers#17){.+.+}-{0:0}, at: do_open fs/namei.c:3615 [inline]
#0: ffff8880253a2418 (sb_writers#17){.+.+}-{0:0}, at: path_openat+0x2112/0x2c50 fs/namei.c:3779
#1: ffff88804f61df30 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff88804f61df30 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:64
#2: ffff88804f61dbc0 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x1e8/0x2a20 fs/ntfs/inode.c:2378
stack backtrace:
CPU: 0 PID: 5817 Comm: syz-executor.3 Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x317/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747
map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
ntfs_truncate+0x263/0x2a20 fs/ntfs/inode.c:2383
ntfs_truncate_vfs fs/ntfs/inode.c:2864 [inline]
ntfs_setattr+0x44d/0x640 fs/ntfs/inode.c:2916
notify_change+0x742/0x11c0 fs/attr.c:499
do_truncate+0x15c/0x220 fs/open.c:66
handle_truncate fs/namei.c:3280 [inline]
do_open fs/namei.c:3626 [inline]
path_openat+0x2597/0x2c50 fs/namei.c:3779
do_filp_open+0x1de/0x430 fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_creat fs/open.c:1528 [inline]
__se_sys_creat fs/open.c:1522 [inline]
__ia32_sys_creat+0xcc/0x120 fs/open.c:1522
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:321
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
RIP: 0023:0xf7ff4579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7fef5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000008
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi