======================================================
WARNING: possible circular locking dependency detected
6.10.0-rc3-next-20240611-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.1/5648 is trying to acquire lock:
ffff88802ed44418 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:153
but task is already holding lock:
ffff8880521a20f8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:815 [inline]
ffff8880521a20f8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_file_write_iter+0x25a/0x770 fs/ntfs3/file.c:1099
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817
down_write+0x3a/0x50 kernel/locking/rwsem.c:1579
inode_lock include/linux/fs.h:795 [inline]
ntfs_file_mmap+0x5d8/0x860 fs/ntfs3/file.c:302
call_mmap include/linux/fs.h:2123 [inline]
mmap_region+0xe8f/0x2090 mm/mmap.c:2927
do_mmap+0x8ad/0xfa0 mm/mmap.c:1438
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573
ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1484
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
-> #0 (&mm->mmap_lock){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3159 [inline]
check_prevs_add kernel/locking/lockdep.c:3278 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3902
__lock_acquire+0x1359/0x2000 kernel/locking/lockdep.c:5194
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817
down_read_killable+0xca/0xd30 kernel/locking/rwsem.c:1549
mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:153
get_mmap_lock_carefully mm/memory.c:5846 [inline]
lock_mm_and_find_vma+0x29c/0x2f0 mm/memory.c:5897
do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
fault_in_readable+0x165/0x2b0
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x220/0x640 mm/filemap.c:4006
ntfs_file_write_iter+0x68f/0x770 fs/ntfs3/file.c:1126
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sb->s_type->i_mutex_key#21);
lock(&mm->mmap_lock);
lock(&sb->s_type->i_mutex_key#21);
rlock(&mm->mmap_lock);
*** DEADLOCK ***
3 locks held by syz-executor.1/5648:
#0: ffff88802a815248 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
#1: ffff8880239e2420 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2870 [inline]
#1: ffff8880239e2420 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#2: ffff8880521a20f8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:815 [inline]
#2: ffff8880521a20f8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_file_write_iter+0x25a/0x770 fs/ntfs3/file.c:1099
stack backtrace:
CPU: 0 PID: 5648 Comm: syz-executor.1 Not tainted 6.10.0-rc3-next-20240611-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:91 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2075
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2204
check_prev_add kernel/locking/lockdep.c:3159 [inline]
check_prevs_add kernel/locking/lockdep.c:3278 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3902
__lock_acquire+0x1359/0x2000 kernel/locking/lockdep.c:5194
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817
down_read_killable+0xca/0xd30 kernel/locking/rwsem.c:1549
mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:153
get_mmap_lock_carefully mm/memory.c:5846 [inline]
lock_mm_and_find_vma+0x29c/0x2f0 mm/memory.c:5897
do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x165/0x2b0 mm/gup.c:2390
Code: b5 ff 4c 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 65 51 b5 ff 4c 39 f3 74 6e 4c 89 64 24 10 <44> 8a 23 43 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10
RSP: 0018:ffffc90012f979e0 EFLAGS: 00050287
RAX: ffffffff81ddf68b RBX: 0000000020073000 RCX: 0000000000040000
RDX: ffffc9000a982000 RSI: 000000000002f072 RDI: 000000000002f073
RBP: ffffc90012f97a98 R08: ffffffff81ddf628 R09: ffffffff84ac0ea9
R10: 0000000000000002 R11: ffff88802eb09e00 R12: 0000000000001000
R13: dffffc0000000000 R14: 0000000020074000 R15: 1ffff920025f2f44
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x220/0x640 mm/filemap.c:4006
ntfs_file_write_iter+0x68f/0x770 fs/ntfs3/file.c:1126
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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
RIP: 0033:0x7fb353e7cea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb3539ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb353fb4050 RCX: 00007fb353e7cea9
RDX: 00000000ffffff6a RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007fb353eebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb353fb4050 R15: 00007fffe9f84bc8
</TASK>
----------------
Code disassembly (best guess):
0: b5 ff mov $0xff,%ch
2: 4c 8d b3 ff 0f 00 00 lea 0xfff(%rbx),%r14
9: 48 89 d8 mov %rbx,%rax
c: 4d 01 e6 add %r12,%r14
f: 49 81 e6 00 f0 ff ff and $0xfffffffffffff000,%r14
16: 49 39 c6 cmp %rax,%r14
19: 72 6b jb 0x86
1b: e8 65 51 b5 ff call 0xffb55185
20: 4c 39 f3 cmp %r14,%rbx
23: 74 6e je 0x93
25: 4c 89 64 24 10 mov %r12,0x10(%rsp)
* 2a: 44 8a 23 mov (%rbx),%r12b <-- trapping instruction
2d: 43 0f b6 04 2f movzbl (%r15,%r13,1),%eax
32: 84 c0 test %al,%al
34: 75 18 jne 0x4e
36: 44 88 64 24 40 mov %r12b,0x40(%rsp)
3b: 48 rex.W
3c: 81 .byte 0x81
3d: c3 ret
3e: 00 10 add %dl,(%rax)