====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.56/6931 is trying to acquire lock: ffff0000f703bbc0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ffff0000f703bbc0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fallocate+0x450/0xdd4 fs/ntfs3/file.c:561 but task is already holding lock: ffff0000f703bff8 (mapping.invalidate_lock#3){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:925 [inline] ffff0000f703bff8 (mapping.invalidate_lock#3){++++}-{4:4}, at: ntfs_fallocate+0x324/0xdd4 fs/ntfs3/file.c:546 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#3){++++}-{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 faultin_page mm/gup.c:1144 [inline] __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446 populate_vma_page_range+0x258/0x348 mm/gup.c:1880 __mm_populate+0x208/0x330 mm/gup.c:1983 mm_populate include/linux/mm.h:3367 [inline] vm_mmap_pgoff+0x398/0x45c mm/util.c:585 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __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 (&mm->mmap_lock){++++}-{4:4}: __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 -> #0 (&ni->ni_lock#3/5){+.+.}-{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 __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] ntfs_fallocate+0x450/0xdd4 fs/ntfs3/file.c:561 vfs_fallocate+0x52c/0x668 fs/open.c:342 madvise_remove mm/madvise.c:1049 [inline] madvise_vma_behavior+0x27c0/0x30a4 mm/madvise.c:1346 madvise_walk_vmas+0x4b4/0x950 mm/madvise.c:1669 madvise_do_behavior+0x5f8/0x7c4 mm/madvise.c:1885 do_madvise+0x190/0x248 mm/madvise.c:1978 __do_sys_madvise mm/madvise.c:1987 [inline] __se_sys_madvise mm/madvise.c:1985 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1985 __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: &ni->ni_lock#3/5 --> &mm->mmap_lock --> mapping.invalidate_lock#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#3); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#3); lock(&ni->ni_lock#3/5); *** DEADLOCK *** 3 locks held by syz.1.56/6931: #0: ffff0000fbb56428 (sb_writers#15){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3108 [inline] #0: ffff0000fbb56428 (sb_writers#15){.+.+}-{0:0}, at: vfs_fallocate+0x4d0/0x668 fs/open.c:341 #1: ffff0000f703be58 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #1: ffff0000f703be58 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: ntfs_fallocate+0x270/0xdd4 fs/ntfs3/file.c:532 #2: ffff0000f703bff8 (mapping.invalidate_lock#3){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:925 [inline] #2: ffff0000f703bff8 (mapping.invalidate_lock#3){++++}-{4:4}, at: ntfs_fallocate+0x324/0xdd4 fs/ntfs3/file.c:546 stack backtrace: CPU: 1 UID: 0 PID: 6931 Comm: syz.1.56 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 __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] ntfs_fallocate+0x450/0xdd4 fs/ntfs3/file.c:561 vfs_fallocate+0x52c/0x668 fs/open.c:342 madvise_remove mm/madvise.c:1049 [inline] madvise_vma_behavior+0x27c0/0x30a4 mm/madvise.c:1346 madvise_walk_vmas+0x4b4/0x950 mm/madvise.c:1669 madvise_do_behavior+0x5f8/0x7c4 mm/madvise.c:1885 do_madvise+0x190/0x248 mm/madvise.c:1978 __do_sys_madvise mm/madvise.c:1987 [inline] __se_sys_madvise mm/madvise.c:1985 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1985 __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