loop9: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.9.289/8384 is trying to acquire lock: ffff0000c2d45510 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0x9c/0x124 mm/memory.c:6957 but task is already holding lock: ffff0000f2e41e60 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ffff0000f2e41e60 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_fiemap+0xf8/0x188 fs/ntfs3/file.c:1324 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ni->ni_lock#2/5){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] attr_data_get_block+0x1e0/0x1864 fs/ntfs3/attrib.c:918 ntfs_get_block_vbo+0x2fc/0xb54 fs/ntfs3/inode.c:605 ntfs_get_block+0x84/0xc4 fs/ntfs3/inode.c:701 mpage_write_folio fs/mpage.c:539 [inline] mpage_writepages+0x1298/0x18ec fs/mpage.c:664 ntfs_writepages+0x11c/0x178 fs/ntfs3/inode.c:913 do_writepages+0x270/0x468 mm/page-writeback.c:2634 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] __filemap_fdatawrite_range mm/filemap.c:419 [inline] filemap_write_and_wait_range+0x1b4/0x2a8 mm/filemap.c:691 ntfs_fallocate+0x3c8/0xdd4 fs/ntfs3/file.c:554 vfs_fallocate+0x52c/0x668 fs/open.c:342 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl+0x584/0x75c fs/ioctl.c:-1 do_vfs_ioctl+0xa10/0x1834 fs/ioctl.c:577 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (mapping.invalidate_lock#8){++++}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] filemap_fault+0x3fc/0x1280 mm/filemap.c:3433 __do_fault+0x1fc/0x4cc mm/memory.c:5152 do_read_fault mm/memory.c:5573 [inline] do_fault mm/memory.c:5707 [inline] do_pte_missing mm/memory.c:4234 [inline] handle_pte_fault mm/memory.c:6052 [inline] __handle_mm_fault mm/memory.c:6195 [inline] handle_mm_fault+0x2c90/0x4d34 mm/memory.c:6364 do_page_fault+0x57c/0x13cc arch/arm64/mm/fault.c:696 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:789 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:929 el1_abort+0x40/0x64 arch/arm64/kernel/entry-common.c:325 el1h_64_sync_handler+0x50/0xfc arch/arm64/kernel/entry-common.c:459 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:591 __arch_copy_from_user+0xb8/0x23c arch/arm64/lib/copy_template.S:104 copy_from_user include/linux/uaccess.h:210 [inline] __do_sys_setrlimit kernel/sys.c:1780 [inline] __se_sys_setrlimit kernel/sys.c:1776 [inline] __arm64_sys_setrlimit+0xc4/0x144 kernel/sys.c:1776 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&mm->mmap_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __might_fault+0xc4/0x124 mm/memory.c:6958 _inline_copy_to_user include/linux/uaccess.h:192 [inline] copy_to_user include/linux/uaccess.h:223 [inline] fiemap_fill_next_extent+0x17c/0x3f0 fs/ioctl.c:145 ni_fiemap+0x764/0x9ec fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x10c/0x188 fs/ntfs3/file.c:1326 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1140/0x1834 fs/ioctl.c:532 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: &mm->mmap_lock --> mapping.invalidate_lock#8 --> &ni->ni_lock#2/5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock#2/5); lock(mapping.invalidate_lock#8); lock(&ni->ni_lock#2/5); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz.9.289/8384: #0: ffff0000f2e41e60 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #0: ffff0000f2e41e60 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_fiemap+0xf8/0x188 fs/ntfs3/file.c:1324 stack backtrace: CPU: 1 UID: 0 PID: 8384 Comm: syz.9.289 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __might_fault+0xc4/0x124 mm/memory.c:6958 _inline_copy_to_user include/linux/uaccess.h:192 [inline] copy_to_user include/linux/uaccess.h:223 [inline] fiemap_fill_next_extent+0x17c/0x3f0 fs/ioctl.c:145 ni_fiemap+0x764/0x9ec fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x10c/0x188 fs/ntfs3/file.c:1326 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1140/0x1834 fs/ioctl.c:532 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596