====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0 Not tainted ------------------------------------------------------ syz.4.4487/16987 is trying to acquire lock: ffff888076c1e078 (&ni->ni_lock#2){+.+.}-{3:3}, at: ntfs_set_state+0x1ff/0x6c0 fs/ntfs3/fsntfs.c:947 but task is already holding lock: ffff888076c1e7d0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] ffff888076c1e7d0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_link+0xf4/0x270 fs/ntfs3/namei.c:141 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock/4){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] mi_read+0x2e1/0x5a0 fs/ntfs3/record.c:148 ntfs_read_mft fs/ntfs3/inode.c:70 [inline] ntfs_iget5+0x482/0x3940 fs/ntfs3/inode.c:537 ni_update_parent+0x943/0xdd0 fs/ntfs3/frecord.c:3286 ni_write_inode+0xd9a/0x1010 fs/ntfs3/frecord.c:3392 ntfs_truncate fs/ntfs3/file.c:472 [inline] ntfs3_setattr+0x962/0xb80 fs/ntfs3/file.c:774 notify_change+0xbcc/0xe90 fs/attr.c:503 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 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 (&ni->ni_lock#2){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ntfs_set_state+0x1ff/0x6c0 fs/ntfs3/fsntfs.c:947 ntfs_link_inode+0xa1/0x170 fs/ntfs3/inode.c:1720 ntfs_link+0x116/0x270 fs/ntfs3/namei.c:146 vfs_link+0x4f2/0x6e0 fs/namei.c:4739 do_linkat+0x555/0x6f0 fs/namei.c:4809 __do_sys_link fs/namei.c:4843 [inline] __se_sys_link fs/namei.c:4841 [inline] __x64_sys_link+0x82/0x90 fs/namei.c:4841 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(&ni->ni_lock/4 ); lock(&ni->ni_lock#2); lock(&ni->ni_lock/4); lock( &ni->ni_lock#2); *** DEADLOCK *** 5 locks held by syz.4.4487/16987: #0: ffff88807b942420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff888076d21248 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline] (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4026 #2: ffff888076c1ea68 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #2: ffff888076c1ea68 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: vfs_link+0x3b2/0x6e0 fs/namei.c:4730 #3: ffff888076d20fb0 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1114 [inline] #3: ffff888076d20fb0 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ntfs_link+0xd9/0x270 fs/ntfs3/namei.c:139 #4: ffff888076c1e7d0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] #4: ffff888076c1e7d0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_link+0xf4/0x270 fs/ntfs3/namei.c:141 stack backtrace: CPU: 1 UID: 0 PID: 16987 Comm: syz.4.4487 Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ntfs_set_state+0x1ff/0x6c0 fs/ntfs3/fsntfs.c:947 ntfs_link_inode+0xa1/0x170 fs/ntfs3/inode.c:1720 ntfs_link+0x116/0x270 fs/ntfs3/namei.c:146 vfs_link+0x4f2/0x6e0 fs/namei.c:4739 do_linkat+0x555/0x6f0 fs/namei.c:4809 __do_sys_link fs/namei.c:4843 [inline] __se_sys_link fs/namei.c:4841 [inline] __x64_sys_link+0x82/0x90 fs/namei.c:4841 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: 0033:0x7f7e28b7dff9 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:00007f7e298a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 RAX: ffffffffffffffda RBX: 00007f7e28d35f80 RCX: 00007f7e28b7dff9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000020000040 RBP: 00007f7e28bf0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7e28d35f80 R15: 00007ffe27cef4e8