====================================================== WARNING: possible circular locking dependency detected 5.15.182-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.361/5241 is trying to acquire lock: ffff0000c88c06d8 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xa0/0x128 mm/memory.c:5356 but task is already holding lock: ffff0000e98db550 (&ni->file.run_lock){.+.+}-{3:3}, at: ni_fiemap+0x248/0x9d0 fs/ntfs3/frecord.c:1915 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ni->file.run_lock){.+.+}-{3:3}: down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 ni_fiemap+0x248/0x9d0 fs/ntfs3/frecord.c:1915 ntfs_fiemap+0xe4/0x140 fs/ntfs3/file.c:1233 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18d8/0x2370 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #2 (&ni->ni_lock/5){+.+.}-{3:3}: __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] attr_data_get_block+0x1d8/0x12b4 fs/ntfs3/attrib.c:849 ntfs_get_block_vbo+0x290/0xa94 fs/ntfs3/inode.c:591 ntfs_get_block+0x84/0xc4 fs/ntfs3/inode.c:690 block_read_full_page+0x298/0xc40 fs/buffer.c:2290 do_mpage_readpage+0x498/0x1ab4 fs/mpage.c:332 mpage_readpage+0xa8/0x16c fs/mpage.c:408 ntfs_readpage+0x180/0x1c0 fs/ntfs3/inode.c:732 filemap_read_page+0x150/0x454 mm/filemap.c:2386 filemap_update_page mm/filemap.c:2464 [inline] filemap_get_pages mm/filemap.c:2574 [inline] filemap_read+0xd84/0x1720 mm/filemap.c:2634 generic_file_read_iter+0xe8/0x518 mm/filemap.c:2794 ntfs_file_read_iter+0x184/0x1e0 fs/ntfs3/file.c:830 call_read_iter include/linux/fs.h:2166 [inline] generic_file_splice_read+0x310/0x4cc fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x334/0x950 fs/splice.c:870 do_splice_direct+0x158/0x248 fs/splice.c:979 do_sendfile+0x458/0xc88 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64 fs/read_write.c:1303 [inline] __arm64_sys_sendfile64+0x130/0x3b0 fs/read_write.c:1303 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (mapping.invalidate_lock#3){.+.+}-{3:3}: down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] filemap_fault+0x4b0/0xeac mm/filemap.c:3081 __do_fault+0x120/0x5d0 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+0x1b4c/0x2950 mm/memory.c:4883 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x694/0xad4 arch/arm64/mm/fault.c:605 do_translation_fault+0xe0/0x130 arch/arm64/mm/fault.c:686 do_mem_abort+0x6c/0x1ac arch/arm64/mm/fault.c:819 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:418 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:522 fault_in_readable+0x268/0x354 mm/gup.c:1801 fault_in_iov_iter_readable+0x120/0x248 lib/iov_iter.c:460 generic_perform_write+0x14c/0x480 mm/filemap.c:3775 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912 ntfs_file_write_iter+0x408/0x49c fs/ntfs3/file.c:1144 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&mm->mmap_lock){++++}-{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+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 __might_fault+0xc8/0x128 mm/memory.c:5357 _copy_to_user include/linux/uaccess.h:174 [inline] copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x15c/0x3e0 fs/ioctl.c:144 ni_fiemap+0x5d8/0x9d0 fs/ntfs3/frecord.c:1998 ntfs_fiemap+0xe4/0x140 fs/ntfs3/file.c:1233 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18d8/0x2370 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Chain exists of: &mm->mmap_lock --> &ni->ni_lock/5 --> &ni->file.run_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock); lock(&ni->ni_lock/5); lock(&ni->file.run_lock); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz.4.361/5241: #0: ffff0000e98db4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #0: ffff0000e98db4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_fiemap+0xd0/0x140 fs/ntfs3/file.c:1231 #1: ffff0000e98db550 (&ni->file.run_lock){.+.+}-{3:3}, at: ni_fiemap+0x248/0x9d0 fs/ntfs3/frecord.c:1915 stack backtrace: CPU: 0 PID: 5241 Comm: syz.4.361 Not tainted 5.15.182-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2011 check_noncircular+0x240/0x2d4 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+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 __might_fault+0xc8/0x128 mm/memory.c:5357 _copy_to_user include/linux/uaccess.h:174 [inline] copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x15c/0x3e0 fs/ioctl.c:144 ni_fiemap+0x5d8/0x9d0 fs/ntfs3/frecord.c:1998 ntfs_fiemap+0xe4/0x140 fs/ntfs3/file.c:1233 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18d8/0x2370 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584