====================================================== WARNING: possible circular locking dependency detected 6.1.31-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/16707 is trying to acquire lock: ffff888032b134a0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] ffff888032b134a0 (&ni->ni_lock/4){+.+.}-{3:3}, at: attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 but task is already holding lock: ffff88807e13ea58 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] ffff88807e13ea58 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:518 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock#2){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __might_fault+0xb2/0x110 mm/memory.c:5655 _copy_to_user+0x26/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144 ni_fiemap+0xa5a/0x1230 fs/ntfs3/frecord.c:2060 ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1245 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:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&ni->file.run_lock){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 ntfs_set_size+0x139/0x1f0 fs/ntfs3/inode.c:831 ntfs_extend+0x15a/0x4c0 fs/ntfs3/file.c:432 ntfs_file_write_iter+0x304/0x6d0 fs/ntfs3/file.c:1159 do_iter_write+0x6e6/0xc50 fs/read_write.c:861 iter_file_splice_write+0x806/0xfa0 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:931 splice_direct_to_actor+0x4c0/0xbd0 fs/splice.c:886 do_splice_direct+0x27f/0x3c0 fs/splice.c:974 do_sendfile+0x61c/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&ni->ni_lock/4){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 ntfs_file_mmap+0x452/0x7e0 fs/ntfs3/file.c:387 call_mmap include/linux/fs.h:2210 [inline] mmap_region+0xf96/0x1fa0 mm/mmap.c:2663 do_mmap+0x8c5/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1457 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &ni->ni_lock/4 --> &ni->file.run_lock --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(&ni->file.run_lock); lock(&mm->mmap_lock#2); lock(&ni->ni_lock/4); *** DEADLOCK *** 1 lock held by syz-executor.2/16707: #0: ffff88807e13ea58 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff88807e13ea58 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:518 stack backtrace: CPU: 1 PID: 16707 Comm: syz-executor.2 Not tainted 6.1.31-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __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:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 ntfs_file_mmap+0x452/0x7e0 fs/ntfs3/file.c:387 call_mmap include/linux/fs.h:2210 [inline] mmap_region+0xf96/0x1fa0 mm/mmap.c:2663 do_mmap+0x8c5/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1457 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f316a28c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f316b00d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f316a3ac050 RCX: 00007f316a28c169 RDX: 0000000000800006 RSI: 0000000002047ffb RDI: 0000000020001000 RBP: 00007f316a2e7ca1 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7973ffaf R14: 00007f316b00d300 R15: 0000000000022000