====================================================== WARNING: possible circular locking dependency detected 5.15.167-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.519/6144 is trying to acquire lock: ffff888061f9f700 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ffff888061f9f700 (&ni->ni_lock/4){+.+.}-{3:3}, at: mi_read+0x2dd/0x5a0 fs/ntfs3/record.c:148 but task is already holding lock: ffff888066d70100 (&ni->ni_lock){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1115 [inline] ffff888066d70100 (&ni->ni_lock){+.+.}-{3:3}, at: ni_write_inode+0x16b/0x1070 fs/ntfs3/frecord.c:3198 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ntfs_set_state+0x1fa/0x660 fs/ntfs3/fsntfs.c:925 ni_remove_name+0x2bc/0x9a0 fs/ntfs3/frecord.c:2880 ntfs_unlink_inode+0x3f5/0x760 fs/ntfs3/inode.c:1753 ntfs_unlink+0x2f/0x50 fs/ntfs3/namei.c:184 vfs_unlink+0x359/0x5f0 fs/namei.c:4280 do_unlinkat+0x4a3/0x950 fs/namei.c:4348 __do_sys_unlink fs/namei.c:4396 [inline] __se_sys_unlink fs/namei.c:4394 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4394 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ni->ni_lock/4){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] mi_read+0x2dd/0x5a0 fs/ntfs3/record.c:148 ntfs_read_mft fs/ntfs3/inode.c:69 [inline] ntfs_iget5+0x472/0x38e0 fs/ntfs3/inode.c:525 ni_update_parent+0x93f/0xdc0 fs/ntfs3/frecord.c:3154 ni_write_inode+0xe32/0x1070 fs/ntfs3/frecord.c:3252 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1705 writeback_single_inode+0x22c/0x960 fs/fs-writeback.c:1760 write_inode_now+0x26e/0x2f0 fs/fs-writeback.c:2800 ntfs_extend+0x3c2/0x4c0 fs/ntfs3/file.c:455 ntfs_file_write_iter+0x2eb/0x540 fs/ntfs3/file.c:1138 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1e6/0x760 fs/read_write.c:855 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x622/0x1000 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock); lock(&ni->ni_lock/4); lock(&ni->ni_lock); lock(&ni->ni_lock/4); *** DEADLOCK *** 3 locks held by syz.0.519/6144: #0: ffff88807b3b8460 (sb_writers#21){.+.+}-{0:0}, at: do_sendfile+0x5fd/0x1000 fs/read_write.c:1248 #1: ffff888066d703a0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:809 [inline] #1: ffff888066d703a0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: ntfs_file_write_iter+0x1ca/0x540 fs/ntfs3/file.c:1122 #2: ffff888066d70100 (&ni->ni_lock){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1115 [inline] #2: ffff888066d70100 (&ni->ni_lock){+.+.}-{3:3}, at: ni_write_inode+0x16b/0x1070 fs/ntfs3/frecord.c:3198 stack backtrace: CPU: 1 PID: 6144 Comm: syz.0.519 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] mi_read+0x2dd/0x5a0 fs/ntfs3/record.c:148 ntfs_read_mft fs/ntfs3/inode.c:69 [inline] ntfs_iget5+0x472/0x38e0 fs/ntfs3/inode.c:525 ni_update_parent+0x93f/0xdc0 fs/ntfs3/frecord.c:3154 ni_write_inode+0xe32/0x1070 fs/ntfs3/frecord.c:3252 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1705 writeback_single_inode+0x22c/0x960 fs/fs-writeback.c:1760 write_inode_now+0x26e/0x2f0 fs/fs-writeback.c:2800 ntfs_extend+0x3c2/0x4c0 fs/ntfs3/file.c:455 ntfs_file_write_iter+0x2eb/0x540 fs/ntfs3/file.c:1138 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1e6/0x760 fs/read_write.c:855 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x622/0x1000 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f8d32c14ff9 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:00007f8d3108d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f8d32dccf80 RCX: 00007f8d32c14ff9 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007 RBP: 00007f8d32c87296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8d32dccf80 R15: 00007ffedaabee38 ntfs3: loop0: ino=1d, "file1" failed to open parent directory r=400 to update ntfs3: loop0: ino=1d, "file1" failed to open parent directory r=400 to update