====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.649/6842 is trying to acquire lock: ffff888062f95220 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ffff888062f95220 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:725 but task is already holding lock: ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_read+0x8b6/0x2480 mm/filemap.c:2634 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (mapping.invalidate_lock#4){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] filemap_fault+0x68b/0x13b0 mm/filemap.c:3081 __do_fault+0x141/0x330 mm/memory.c:3928 do_read_fault mm/memory.c:4264 [inline] do_fault mm/memory.c:4392 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x2946/0x43b0 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x93e/0x11c0 mm/gup.c:1197 populate_vma_page_range+0x213/0x290 mm/gup.c:1529 __mm_populate+0x26f/0x3a0 mm/gup.c:1638 mm_populate include/linux/mm.h:2646 [inline] vm_mmap_pgoff+0x203/0x2b0 mm/util.c:556 ksys_mmap_pgoff+0x542/0x780 mm/mmap.c:1635 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #2 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xb3/0x110 mm/memory.c:5357 _copy_to_user+0x29/0x130 lib/usercopy.c:35 copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x19d/0x360 fs/ioctl.c:144 ni_fiemap+0x92d/0xc20 fs/ntfs3/frecord.c:2019 ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1236 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1464/0x1de0 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&ni->file.run_lock#3){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ntfs_set_size+0x13c/0x1f0 fs/ntfs3/inode.c:844 ntfs_extend+0x15c/0x510 fs/ntfs3/file.c:434 ntfs_file_write_iter+0x30c/0x590 fs/ntfs3/file.c:1142 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x712/0xd00 fs/read_write.c:594 ksys_write+0x14d/0x250 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ni->ni_lock/5){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 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] ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:725 filemap_read_page+0x17b/0x4c0 mm/filemap.c:2386 filemap_update_page mm/filemap.c:2464 [inline] filemap_get_pages mm/filemap.c:2574 [inline] filemap_read+0x13d5/0x2480 mm/filemap.c:2634 call_read_iter include/linux/fs.h:2167 [inline] generic_file_splice_read+0x3a2/0x590 fs/splice.c:311 do_splice_to fs/splice.c:807 [inline] splice_direct_to_actor+0x417/0xbd0 fs/splice.c:881 do_splice_direct+0x1b6/0x2c0 fs/splice.c:1008 do_sendfile+0x5d5/0xec0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &ni->ni_lock/5 --> &mm->mmap_lock --> mapping.invalidate_lock#4 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#4); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#4); lock(&ni->ni_lock/5); *** DEADLOCK *** 2 locks held by syz.5.649/6842: #0: ffff88807b21a460 (sb_writers#14){.+.+}-{0:0}, at: do_sendfile+0x5b2/0xec0 fs/read_write.c:1248 #1: ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff888062f95660 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_read+0x8b6/0x2480 mm/filemap.c:2634 stack backtrace: CPU: 0 PID: 6842 Comm: syz.5.649 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 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] ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:725 filemap_read_page+0x17b/0x4c0 mm/filemap.c:2386 filemap_update_page mm/filemap.c:2464 [inline] filemap_get_pages mm/filemap.c:2574 [inline] filemap_read+0x13d5/0x2480 mm/filemap.c:2634 call_read_iter include/linux/fs.h:2167 [inline] generic_file_splice_read+0x3a2/0x590 fs/splice.c:311 do_splice_to fs/splice.c:807 [inline] splice_direct_to_actor+0x417/0xbd0 fs/splice.c:881 do_splice_direct+0x1b6/0x2c0 fs/splice.c:1008 do_sendfile+0x5d5/0xec0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4a85b4ffc9 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:00007f4a83db7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f4a85da6fa0 RCX: 00007f4a85b4ffc9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f4a85bd2f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4a85da7038 R14: 00007f4a85da6fa0 R15: 00007ffe0f4cfdf8