====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 Not tainted ------------------------------------------------------ syz-executor/11002 is trying to acquire lock: ffff88805a314318 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ffff88805a314318 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_unlink_inode+0x273/0x6a0 fs/ntfs3/inode.c:1728 but task is already holding lock: ffff88805a3125b8 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1110 [inline] ffff88805a3125b8 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_rmdir+0xb6/0xf0 fs/ntfs3/namei.c:222 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ni->ni_lock/6){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746 ni_lock_dir fs/ntfs3/ntfs_fs.h:1110 [inline] ntfs_unlink+0xb6/0xf0 fs/ntfs3/namei.c:177 vfs_unlink+0x391/0x650 fs/namei.c:4579 do_unlinkat+0x350/0x560 fs/namei.c:4643 __do_sys_unlinkat fs/namei.c:4684 [inline] __se_sys_unlinkat fs/namei.c:4677 [inline] __x64_sys_unlinkat+0xd3/0xf0 fs/namei.c:4677 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ntfs_file_mmap+0x525/0x730 fs/ntfs3/file.c:397 call_mmap include/linux/fs.h:2243 [inline] mmap_file mm/internal.h:167 [inline] __mmap_new_file_vma mm/vma.c:2353 [inline] __mmap_new_vma mm/vma.c:2417 [inline] __mmap_region mm/vma.c:2519 [inline] mmap_region+0x103b/0x1e50 mm/vma.c:2597 do_mmap+0xc68/0x1100 mm/mmap.c:561 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __might_fault+0xcc/0x130 mm/memory.c:7151 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x1c0/0x390 fs/ioctl.c:145 ni_fiemap+0x89c/0xbf0 fs/ntfs3/frecord.c:2007 ntfs_fiemap+0xda/0x130 fs/ntfs3/file.c:1380 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1638/0x1eb0 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->ni_lock#3/5){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746 ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ntfs_unlink_inode+0x273/0x6a0 fs/ntfs3/inode.c:1728 ntfs_rmdir+0xc1/0xf0 fs/ntfs3/namei.c:224 vfs_rmdir+0x3b7/0x520 fs/namei.c:4454 do_rmdir+0x2ac/0x630 fs/namei.c:4509 __do_sys_unlinkat fs/namei.c:4683 [inline] __se_sys_unlinkat fs/namei.c:4677 [inline] __x64_sys_unlinkat+0xc2/0xf0 fs/namei.c:4677 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ni->ni_lock#3/5 --> &sb->s_type->i_mutex_key#26 --> &ni->ni_lock/6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock/6); lock(&sb->s_type->i_mutex_key#26); lock(&ni->ni_lock/6); lock(&ni->ni_lock#3/5); *** DEADLOCK *** 4 locks held by syz-executor/11002: #0: ffff88803057a420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556 #1: ffff88805a312850 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #1: ffff88805a312850 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: do_rmdir+0x1b2/0x630 fs/namei.c:4501 #2: ffff88805a3145b0 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #2: ffff88805a3145b0 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: vfs_rmdir+0xf7/0x520 fs/namei.c:4443 #3: ffff88805a3125b8 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1110 [inline] #3: ffff88805a3125b8 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_rmdir+0xb6/0xf0 fs/ntfs3/namei.c:222 stack backtrace: CPU: 1 UID: 0 PID: 11002 Comm: syz-executor Not tainted 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746 ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ntfs_unlink_inode+0x273/0x6a0 fs/ntfs3/inode.c:1728 ntfs_rmdir+0xc1/0xf0 fs/ntfs3/namei.c:224 vfs_rmdir+0x3b7/0x520 fs/namei.c:4454 do_rmdir+0x2ac/0x630 fs/namei.c:4509 __do_sys_unlinkat fs/namei.c:4683 [inline] __se_sys_unlinkat fs/namei.c:4677 [inline] __x64_sys_unlinkat+0xc2/0xf0 fs/namei.c:4677 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f21ac98df47 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 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:00007ffff76a6458 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f21ac98df47 RDX: 0000000000000200 RSI: 00007ffff76a7600 RDI: 00000000ffffff9c RBP: 00007f21aca1089d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffff76a7600 R13: 00007f21aca1089d R14: 000000000006bff7 R15: 00007ffff76a97c0