loop0: detected capacity change from 0 to 4096
ntfs: volume version 3.1.
======================================================
WARNING: possible circular locking dependency detected
6.8.0-rc2-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/17726 is trying to acquire lock:
ffff88804a1d89d0 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
but task is already holding lock:
ffff88804a1d8940 (&rl->lock){+.+.}-{3:3}, at: ntfs_attr_extend_allocation+0x25e/0x3840 fs/ntfs/attrib.c:2001
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rl->lock){+.+.}-{3:3}:
down_write+0x3a/0x50 kernel/locking/rwsem.c:1579
__ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189
ntfs_evict_big_inode+0x29e/0x530 fs/ntfs/inode.c:2278
evict+0x2ed/0x6b0 fs/inode.c:665
dispose_list+0x117/0x1e0 fs/inode.c:698
prune_icache_sb+0xeb/0x150 fs/inode.c:883
super_cache_scan+0x372/0x540 fs/super.c:223
do_shrink_slab+0x428/0x1120 mm/shrinker.c:435
shrink_slab_memcg mm/shrinker.c:548 [inline]
shrink_slab+0xa83/0x1310 mm/shrinker.c:626
shrink_one+0x48f/0x7b0 mm/vmscan.c:4767
shrink_many mm/vmscan.c:4828 [inline]
lru_gen_shrink_node mm/vmscan.c:4929 [inline]
shrink_node+0x2149/0x3740 mm/vmscan.c:5888
kswapd_shrink_node mm/vmscan.c:6693 [inline]
balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883
kswapd+0x5be/0xbf0 mm/vmscan.c:7143
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
-> #1 (fs_reclaim){+.+.}-{0:0}:
__fs_reclaim_acquire mm/page_alloc.c:3692 [inline]
fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3706
might_alloc include/linux/sched/mm.h:303 [inline]
prepare_alloc_pages.constprop.0+0x155/0x550 mm/page_alloc.c:4338
__alloc_pages+0x193/0x2440 mm/page_alloc.c:4556
alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
folio_alloc+0x1e/0xe0 mm/mempolicy.c:2211
filemap_alloc_folio+0x3bb/0x490 mm/filemap.c:975
do_read_cache_folio+0x1b8/0x540 mm/filemap.c:3667
do_read_cache_page mm/filemap.c:3769 [inline]
read_cache_page+0x5b/0x160 mm/filemap.c:3778
read_mapping_page include/linux/pagemap.h:888 [inline]
ntfs_map_page fs/ntfs/aops.h:75 [inline]
map_mft_record_page fs/ntfs/mft.c:73 [inline]
map_mft_record+0x1dd/0x730 fs/ntfs/mft.c:156
ntfs_read_locked_inode+0x19b/0x5860 fs/ntfs/inode.c:550
ntfs_iget+0x130/0x180 fs/ntfs/inode.c:177
ntfs_lookup+0x312/0xc30 fs/ntfs/namei.c:117
lookup_open.isra.0+0x926/0x13b0 fs/namei.c:3474
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0x931/0x2990 fs/namei.c:3795
do_filp_open+0x1de/0x430 fs/namei.c:3825
do_sys_openat2+0x176/0x1e0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_compat_sys_open fs/open.c:1470 [inline]
__se_compat_sys_open fs/open.c:1468 [inline]
__ia32_compat_sys_open+0x147/0x1d0 fs/open.c:1468
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x79/0x110 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
-> #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+0x2445/0x3b30 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:608 [inline]
__mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:752
map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
ntfs_attr_extend_allocation+0x268/0x3840 fs/ntfs/attrib.c:2002
ntfs_prepare_file_for_write fs/ntfs/file.c:391 [inline]
ntfs_file_write_iter+0xaa0/0x2070 fs/ntfs/file.c:1907
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6d5/0x1100 fs/read_write.c:590
ksys_write+0x12f/0x250 fs/read_write.c:643
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x79/0x110 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:
Chain exists of:
&ni->mrec_lock --> fs_reclaim --> &rl->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rl->lock);
lock(fs_reclaim);
lock(&rl->lock);
lock(&ni->mrec_lock);
*** DEADLOCK ***
4 locks held by syz-executor.0/17726:
#0: ffff88802539d248 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x170 fs/file.c:1191
#1: ffff888055752420 (sb_writers#35){.+.+}-{0:0}, at: ksys_write+0x12f/0x250 fs/read_write.c:643
#2: ffff88804a1d8cb0 (&sb->s_type->i_mutex_key#44){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#2: ffff88804a1d8cb0 (&sb->s_type->i_mutex_key#44){+.+.}-{3:3}, at: ntfs_file_write_iter+0x78/0x2070 fs/ntfs/file.c:1905
#3: ffff88804a1d8940 (&rl->lock){+.+.}-{3:3}, at: ntfs_attr_extend_allocation+0x25e/0x3840 fs/ntfs/attrib.c:2001
stack backtrace:
CPU: 0 PID: 17726 Comm: syz-executor.0 Not tainted 6.8.0-rc2-syzkaller #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+0x2445/0x3b30 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:608 [inline]
__mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:752
map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154
ntfs_attr_extend_allocation+0x268/0x3840 fs/ntfs/attrib.c:2002
ntfs_prepare_file_for_write fs/ntfs/file.c:391 [inline]
ntfs_file_write_iter+0xaa0/0x2070 fs/ntfs/file.c:1907
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6d5/0x1100 fs/read_write.c:590
ksys_write+0x12f/0x250 fs/read_write.c:643
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x79/0x110 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: 0023:0xf7f92579
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:00000000f7f8d5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020004200
RDX: 00000000000ffe00 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