====================================================== WARNING: possible circular locking dependency detected 6.12.0-syzkaller-00171-g23acd177540d #0 Not tainted ------------------------------------------------------ syz-executor/9221 is trying to acquire lock: ffff88805ab66078 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] ffff88805ab66078 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ntfs_unlink_inode+0x324/0x7c0 fs/ntfs3/inode.c:1765 but task is already holding lock: ffff88805ab61708 (&ni->ni_lock/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1114 [inline] ffff88805ab61708 (&ni->ni_lock/6){+.+.}-{3:3}, at: ntfs_rmdir+0xb1/0xf0 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){+.+.}-{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_dir fs/ntfs3/ntfs_fs.h:1114 [inline] ntfs_unlink+0xb1/0xf0 fs/ntfs3/namei.c:177 vfs_unlink+0x365/0x650 fs/namei.c:4510 do_unlinkat+0x4ae/0x830 fs/namei.c:4574 __do_sys_unlink fs/namei.c:4622 [inline] __se_sys_unlink fs/namei.c:4620 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4620 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 -> #2 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] ntfs_file_mmap+0x5bc/0x850 fs/ntfs3/file.c:377 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:123 [inline] __mmap_region mm/mmap.c:1453 [inline] mmap_region+0x1a2a/0x23f0 mm/mmap.c:1603 do_mmap+0x8f0/0x1000 mm/mmap.c:496 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:542 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 -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __might_fault+0xc6/0x120 mm/memory.c:6716 _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] ni_fiemap+0x57c/0x18c0 fs/ntfs3/frecord.c:2139 ntfs_fiemap+0x132/0x180 fs/ntfs3/file.c:1352 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1bf8/0x2e40 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893 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#2/5){+.+.}-{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 ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] ntfs_unlink_inode+0x324/0x7c0 fs/ntfs3/inode.c:1765 ntfs_rmdir+0xbc/0xf0 fs/ntfs3/namei.c:224 vfs_rmdir+0x3a3/0x510 fs/namei.c:4381 do_rmdir+0x3b5/0x580 fs/namei.c:4440 __do_sys_unlinkat fs/namei.c:4616 [inline] __se_sys_unlinkat fs/namei.c:4610 [inline] __x64_sys_unlinkat+0xde/0xf0 fs/namei.c:4610 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: Chain exists of: &ni->ni_lock#2/5 --> &sb->s_type->i_mutex_key#21 --> &ni->ni_lock/6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock/6); lock(&sb->s_type->i_mutex_key#21); lock(&ni->ni_lock/6); lock(&ni->ni_lock#2/5); *** DEADLOCK *** 4 locks held by syz-executor/9221: #0: ffff888071816420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff88805ab619a0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:853 [inline] #1: ffff88805ab619a0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: do_rmdir+0x263/0x580 fs/namei.c:4428 #2: ffff88805ab66310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:818 [inline] #2: ffff88805ab66310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_rmdir+0x101/0x510 fs/namei.c:4370 #3: ffff88805ab61708 (&ni->ni_lock/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1114 [inline] #3: ffff88805ab61708 (&ni->ni_lock/6){+.+.}-{3:3}, at: ntfs_rmdir+0xb1/0xf0 fs/ntfs3/namei.c:222 stack backtrace: CPU: 1 UID: 0 PID: 9221 Comm: syz-executor Not tainted 6.12.0-syzkaller-00171-g23acd177540d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 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 ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline] ntfs_unlink_inode+0x324/0x7c0 fs/ntfs3/inode.c:1765 ntfs_rmdir+0xbc/0xf0 fs/ntfs3/namei.c:224 vfs_rmdir+0x3a3/0x510 fs/namei.c:4381 do_rmdir+0x3b5/0x580 fs/namei.c:4440 __do_sys_unlinkat fs/namei.c:4616 [inline] __se_sys_unlinkat fs/namei.c:4610 [inline] __x64_sys_unlinkat+0xde/0xf0 fs/namei.c:4610 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: 0033:0x7fbbad77dd37 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:00007ffd1d1e55c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fbbad77dd37 RDX: 0000000000000200 RSI: 00007ffd1d1e6770 RDI: 00000000ffffff9c RBP: 00007fbbad7f15fc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffd1d1e6770 R13: 00007fbbad7f15fc R14: 000000000006bef9 R15: 00007ffd1d1e8920