======================================================
WARNING: possible circular locking dependency detected
6.1.130-syzkaller #0 Not tainted
------------------------------------------------------
syz.5.691/7012 is trying to acquire lock:
ffff88804c479b60 (mapping.invalidate_lock#5){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
ffff88804c479b60 (mapping.invalidate_lock#5){++++}-{3:3}, at: filemap_fault+0x640/0x17e0 mm/filemap.c:3219
but task is already holding lock:
ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline]
ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5382
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&mm->mmap_lock){++++}-{3:3}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__might_fault+0xbd/0x110 mm/memory.c:5851
_copy_to_user+0x26/0x130 lib/usercopy.c:36
copy_to_user include/linux/uaccess.h:169 [inline]
ni_fiemap+0x1674/0x18b0 fs/ntfs3/frecord.c:2140
ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1254
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x81/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #1 (&ni->ni_lock/5){+.+.}-{3:3}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747
ni_lock fs/ntfs3/ntfs_fs.h:1101 [inline]
ntfs_fallocate+0x7e9/0x1020 fs/ntfs3/file.c:665
vfs_fallocate+0x547/0x6b0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #0 (mapping.invalidate_lock#5){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
down_read+0xad/0xa30 kernel/locking/rwsem.c:1520
filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
filemap_fault+0x640/0x17e0 mm/filemap.c:3219
__do_fault+0x136/0x4f0 mm/memory.c:4278
do_read_fault mm/memory.c:4629 [inline]
do_fault mm/memory.c:4758 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x3410/0x5340 mm/memory.c:5292
do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:231
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf3/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
io_register_file_alloc_range+0x91/0x2e0 io_uring/filetable.c:183
__io_uring_register io_uring/io_uring.c:4142 [inline]
__do_sys_io_uring_register io_uring/io_uring.c:4175 [inline]
__se_sys_io_uring_register+0xa79/0x15b0 io_uring/io_uring.c:4152
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
other info that might help us debug this:
Chain exists of:
mapping.invalidate_lock#5 --> &ni->ni_lock/5 --> &mm->mmap_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&mm->mmap_lock);
lock(&ni->ni_lock/5);
lock(&mm->mmap_lock);
lock(mapping.invalidate_lock#5);
*** DEADLOCK ***
2 locks held by syz.5.691/7012:
#0: ffff888026b5a0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register io_uring/io_uring.c:4174 [inline]
#0: ffff888026b5a0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __se_sys_io_uring_register+0x311/0x15b0 io_uring/io_uring.c:4152
#1: ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline]
#1: ffff88803074ae58 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5382
stack backtrace:
CPU: 1 PID: 7012 Comm: syz.5.691 Not tainted 6.1.130-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 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+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
down_read+0xad/0xa30 kernel/locking/rwsem.c:1520
filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
filemap_fault+0x640/0x17e0 mm/filemap.c:3219
__do_fault+0x136/0x4f0 mm/memory.c:4278
do_read_fault mm/memory.c:4629 [inline]
do_fault mm/memory.c:4758 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x3410/0x5340 mm/memory.c:5292
do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:232
Code: 83 f8 12 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10
RSP: 0018:ffffc90003c17d10 EFLAGS: 00050202
RAX: ffffffff8443c701 RBX: 00007fffffffeff0 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000400000000000 RDI: ffffc90003c17d80
RBP: ffffc90003c17df0 R08: dffffc0000000000 R09: fffff52000782fb2
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000010
R13: dffffc0000000000 R14: ffffc90003c17d80 R15: 0000400000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf3/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
io_register_file_alloc_range+0x91/0x2e0 io_uring/filetable.c:183
__io_uring_register io_uring/io_uring.c:4142 [inline]
__do_sys_io_uring_register io_uring/io_uring.c:4175 [inline]
__se_sys_io_uring_register+0xa79/0x15b0 io_uring/io_uring.c:4152
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5ee1b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ee293e038 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f5ee1da6080 RCX: 00007f5ee1b8d169
RDX: 0000400000000000 RSI: 0000000000000019 RDI: 0000000000000004
RBP: 00007f5ee1c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5ee1da6080 R15: 00007fffe33475a8
</TASK>
----------------
Code disassembly (best guess):
0: 83 f8 12 cmp $0x12,%eax
3: 74 0a je 0xf
5: 89 d1 mov %edx,%ecx
7: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)
9: 89 c8 mov %ecx,%eax
b: 0f 01 ca clac
e: c3 ret
f: 89 d0 mov %edx,%eax
11: 0f 01 ca clac
14: c3 ret
15: 01 ca add %ecx,%edx
17: eb e7 jmp 0x0
19: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
20: 89 d1 mov %edx,%ecx
22: 83 e2 07 and $0x7,%edx
25: c1 e9 03 shr $0x3,%ecx
28: 74 12 je 0x3c
* 2a: 4c 8b 06 mov (%rsi),%r8 <-- trapping instruction
2d: 4c 89 07 mov %r8,(%rdi)
30: 48 8d 76 08 lea 0x8(%rsi),%rsi
34: 48 8d 7f 08 lea 0x8(%rdi),%rdi
38: ff c9 dec %ecx
3a: 75 ee jne 0x2a
3c: 21 d2 and %edx,%edx
3e: 74 10 je 0x50