====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc6-syzkaller-gaaef6f251176 #0 Not tainted ------------------------------------------------------ syz.3.230/7797 is trying to acquire lock: ffff0000d71781d0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0x9c/0x124 mm/memory.c:6970 but task is already holding lock: ffff0000ee2bbbc0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ffff0000ee2bbbc0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_fiemap+0xd0/0x140 fs/ntfs3/file.c:1288 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ni->ni_lock/5){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:602 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ntfs_fallocate+0x624/0xdd4 fs/ntfs3/file.c:600 vfs_fallocate+0x5cc/0x73c fs/open.c:341 ksys_fallocate fs/open.c:365 [inline] __do_sys_fallocate fs/open.c:370 [inline] __se_sys_fallocate fs/open.c:368 [inline] __arm64_sys_fallocate+0xbc/0x10c fs/open.c:368 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (mapping.invalidate_lock#6){++++}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] filemap_fault+0x3fc/0x1280 mm/filemap.c:3400 __do_fault+0x1fc/0x4cc mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault mm/memory.c:6212 [inline] handle_mm_fault+0x2c94/0x4d38 mm/memory.c:6381 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+0x3c/0x5c arch/arm64/kernel/entry-common.c:481 el1h_64_sync_handler+0x50/0xfc arch/arm64/kernel/entry-common.c:597 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:591 __arch_copy_from_user+0xa8/0x23c arch/arm64/lib/copy_template.S:101 copy_from_user include/linux/uaccess.h:210 [inline] ioctl_fiemap fs/ioctl.c:210 [inline] do_vfs_ioctl+0x890/0x1cd8 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&mm->mmap_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 __might_fault+0xc4/0x124 mm/memory.c:6971 _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+0xe4/0x140 fs/ntfs3/file.c:1290 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1560/0x1cd8 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 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#6 --> &ni->ni_lock/5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock/5); lock(mapping.invalidate_lock#6); lock(&ni->ni_lock/5); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz.3.230/7797: #0: ffff0000ee2bbbc0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #0: ffff0000ee2bbbc0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_fiemap+0xd0/0x140 fs/ntfs3/file.c:1288 stack backtrace: CPU: 1 UID: 0 PID: 7797 Comm: syz.3.230 Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 __might_fault+0xc4/0x124 mm/memory.c:6971 _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+0xe4/0x140 fs/ntfs3/file.c:1290 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1560/0x1cd8 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596