====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc1-syzkaller-g39dfc971e42d #0 Not tainted ------------------------------------------------------ syz.7.287/8139 is trying to acquire lock: ffff0000f2a9d600 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] ffff0000f2a9d600 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_fault+0x3fc/0x1280 mm/filemap.c:3400 but task is already holding lock: ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:431 [inline] ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:188 [inline] ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x38/0x2d8 mm/mmap_lock.c:248 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xc4/0x124 mm/memory.c:6991 _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+0x6bc/0x9ec fs/ntfs3/frecord.c:1985 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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (&ni->ni_lock#3/5){+.+.}-{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_read_folio+0x140/0x1c0 fs/ntfs3/inode.c:736 filemap_read_folio+0xec/0x2f8 mm/filemap.c:2412 filemap_create_folio mm/filemap.c:2547 [inline] filemap_get_pages+0xbc4/0x19c8 mm/filemap.c:2608 filemap_splice_read+0x400/0xa40 mm/filemap.c:2990 ntfs_file_splice_read+0x128/0x198 fs/ntfs3/file.c:859 do_splice_read fs/splice.c:979 [inline] splice_direct_to_actor+0x364/0x994 fs/splice.c:1083 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x130/0x210 fs/splice.c:1227 do_sendfile+0x3cc/0x658 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __arm64_sys_sendfile64+0x1b4/0x274 fs/read_write.c:1417 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (mapping.invalidate_lock#7){++++}-{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 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] filemap_fault+0x3fc/0x1280 mm/filemap.c:3400 __do_fault+0x1fc/0x4cc mm/memory.c:5189 do_read_fault mm/memory.c:5610 [inline] do_fault mm/memory.c:5744 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6089 [inline] __handle_mm_fault mm/memory.c:6232 [inline] handle_mm_fault+0x2c94/0x4d38 mm/memory.c:6401 do_page_fault+0x598/0x1554 arch/arm64/mm/fault.c:690 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:783 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:919 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:455 el1h_64_sync_handler+0x50/0xcc arch/arm64/kernel/entry-common.c:533 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:595 __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:169 [inline] fault_in_readable+0x110/0x1c0 mm/gup.c:2227 fault_in_iov_iter_readable+0x1a8/0x2c4 lib/iov_iter.c:94 generic_perform_write+0x654/0x79c mm/filemap.c:4161 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4229 ntfs_file_write_iter+0x58c/0x66c fs/ntfs3/file.c:1197 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x62c/0x97c fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:798 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#7 --> &ni->ni_lock#3/5 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->ni_lock#3/5); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#7); *** DEADLOCK *** 3 locks held by syz.7.287/8139: #0: ffff0000f64f2428 (sb_writers#17){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3092 [inline] #0: ffff0000f64f2428 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:682 #1: ffff0000f2a9cd08 (&sb->s_type->i_mutex_key#31){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:897 [inline] #1: ffff0000f2a9cd08 (&sb->s_type->i_mutex_key#31){+.+.}-{4:4}, at: ntfs_file_write_iter+0x74/0x66c fs/ntfs3/file.c:1160 #2: ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:431 [inline] #2: ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:188 [inline] #2: ffff0000d2ce81d0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x38/0x2d8 mm/mmap_lock.c:248 stack backtrace: CPU: 1 UID: 0 PID: 8139 Comm: syz.7.287 Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #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:466 (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 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] filemap_fault+0x3fc/0x1280 mm/filemap.c:3400 __do_fault+0x1fc/0x4cc mm/memory.c:5189 do_read_fault mm/memory.c:5610 [inline] do_fault mm/memory.c:5744 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6089 [inline] __handle_mm_fault mm/memory.c:6232 [inline] handle_mm_fault+0x2c94/0x4d38 mm/memory.c:6401 do_page_fault+0x598/0x1554 arch/arm64/mm/fault.c:690 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:783 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:919 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:455 el1h_64_sync_handler+0x50/0xcc arch/arm64/kernel/entry-common.c:533 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:595 __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:169 [inline] (P) fault_in_readable+0x110/0x1c0 mm/gup.c:2227 (P) fault_in_iov_iter_readable+0x1a8/0x2c4 lib/iov_iter.c:94 generic_perform_write+0x654/0x79c mm/filemap.c:4161 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4229 ntfs_file_write_iter+0x58c/0x66c fs/ntfs3/file.c:1197 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x62c/0x97c fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:798 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600