======================================================
WARNING: possible circular locking dependency detected
6.1.135-syzkaller #0 Not tainted
------------------------------------------------------
syz.4.1439/12117 is trying to acquire lock:
ffff88807de188d8 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xa6/0x120 mm/memory.c:5852
but task is already holding lock:
ffff888055b3f700
(&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline]
(&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_fiemap+0xc4/0x130 fs/ntfs3/file.c:1167
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ni->ni_lock/5){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747
ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline]
attr_data_get_block+0x33b/0x1b70 fs/ntfs3/attrib.c:951
ntfs_file_mmap+0x44b/0x6a0 fs/ntfs3/file.c:312
call_mmap include/linux/fs.h:2270 [inline]
mmap_file+0x5d/0xb0 mm/util.c:1109
__mmap_region mm/mmap.c:2760 [inline]
mmap_region+0xf78/0x1d30 mm/mmap.c:2904
do_mmap+0x894/0xf30 mm/mmap.c:1424
vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:520
ksys_mmap_pgoff+0x516/0x6f0 mm/mmap.c:1470
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #0 (&mm->mmap_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+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
__might_fault+0xc2/0x120 mm/memory.c:5852
_copy_to_user+0x27/0x130 lib/usercopy.c:36
copy_to_user include/linux/uaccess.h:169 [inline]
ni_fiemap+0x4ec/0x1300 fs/ntfs3/frecord.c:2140
ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1169
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x1425/0x1d10 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ni->ni_lock/5);
lock(&mm->mmap_lock);
lock(&ni->ni_lock/5);
lock(&mm->mmap_lock);
*** DEADLOCK ***
1 lock held by syz.4.1439/12117:
#0: ffff888055b3f700 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline]
#0: ffff888055b3f700 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_fiemap+0xc4/0x130 fs/ntfs3/file.c:1167
stack backtrace:
CPU: 0 PID: 12117 Comm: syz.4.1439 Not tainted 6.1.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
check_noncircular+0x274/0x310 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+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
__might_fault+0xc2/0x120 mm/memory.c:5852
_copy_to_user+0x27/0x130 lib/usercopy.c:36
copy_to_user include/linux/uaccess.h:169 [inline]
ni_fiemap+0x4ec/0x1300 fs/ntfs3/frecord.c:2140
ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1169
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x1425/0x1d10 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcbcd58e969
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:00007fcbce4a8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcbcd7b6080 RCX: 00007fcbcd58e969
RDX: 0000200000000080 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007fcbcd610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcbcd7b6080 R15: 00007ffcf55c68d8
</TASK>