====================================================== WARNING: possible circular locking dependency detected 6.1.137-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.896/7304 is trying to acquire lock: ffff888071ea1720 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline] ffff888071ea1720 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_fallocate+0x71d/0xf20 fs/ntfs3/file.c:567 but task is already holding lock: ffff888071ea1b60 (mapping.invalidate_lock#10){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline] ffff888071ea1b60 (mapping.invalidate_lock#10){++++}-{3:3}, at: ntfs_fallocate+0x38a/0xf20 fs/ntfs3/file.c:503 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#10){++++}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] filemap_fault+0x53c/0x1670 mm/filemap.c:3220 __do_fault+0x13b/0x4e0 mm/memory.c:4280 do_read_fault mm/memory.c:4631 [inline] do_fault mm/memory.c:4760 [inline] handle_pte_fault mm/memory.c:5031 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x28ca/0x3e70 mm/memory.c:5294 do_user_addr_fault+0x51f/0xb10 arch/x86/mm/fault.c:1340 handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608 copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:231 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0xf4/0x170 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:161 [inline] ioctl_fiemap fs/ioctl.c:209 [inline] do_vfs_ioctl+0x5c3/0x1d10 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc2/0x120 mm/memory.c:5852 _copy_to_user+0x27/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] ni_fiemap+0x4ec/0x1300 fs/ntfs3/frecord.c:2140 ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1170 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1425/0x1d10 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ni->ni_lock/5){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline] ntfs_fallocate+0x71d/0xf20 fs/ntfs3/file.c:567 vfs_fallocate+0x584/0x6f0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ni->ni_lock/5 --> &mm->mmap_lock --> mapping.invalidate_lock#10 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#10); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#10); lock(&ni->ni_lock/5); *** DEADLOCK *** 3 locks held by syz.0.896/7304: #0: ffff88805af7a460 (sb_writers#17){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3015 [inline] #0: ffff88805af7a460 (sb_writers#17){.+.+}-{0:0}, at: vfs_fallocate+0x4f1/0x6f0 fs/open.c:322 #1: ffff888071ea19c0 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff888071ea19c0 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: ntfs_fallocate+0x2df/0xf20 fs/ntfs3/file.c:489 #2: ffff888071ea1b60 (mapping.invalidate_lock#10){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline] #2: ffff888071ea1b60 (mapping.invalidate_lock#10){++++}-{3:3}, at: ntfs_fallocate+0x38a/0xf20 fs/ntfs3/file.c:503 stack backtrace: CPU: 0 PID: 7304 Comm: syz.0.896 Not tainted 6.1.137-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1102 [inline] ntfs_fallocate+0x71d/0xf20 fs/ntfs3/file.c:567 vfs_fallocate+0x584/0x6f0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fada6b8e969 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:00007fada793e038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fada6db6080 RCX: 00007fada6b8e969 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000004 RBP: 00007fada6c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fada6db6080 R15: 00007fffe9a02808