====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc5-syzkaller-gec4801305969 #0 Not tainted ------------------------------------------------------ syz.3.58/6914 is trying to acquire lock: ffff0000c2397050 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable+0x28/0x8c include/linux/mmap_lock.h:421 but task is already holding lock: ffff0000f8033700 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:899 [inline] ffff0000f8033700 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: ntfs_file_write_iter+0x74/0x66c fs/ntfs3/file.c:1160 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ntfs_file_mmap+0x45c/0x5e8 fs/ntfs3/file.c:313 call_mmap include/linux/fs.h:2286 [inline] mmap_file mm/internal.h:167 [inline] __mmap_new_file_vma mm/vma.c:2405 [inline] __mmap_new_vma mm/vma.c:2467 [inline] __mmap_region mm/vma.c:2622 [inline] mmap_region+0xe9c/0x1c0c mm/vma.c:2692 do_mmap+0x968/0xfac mm/mmap.c:561 vm_mmap_pgoff+0x2b8/0x43c mm/util.c:579 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __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+0x98/0x2b8 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 down_read_killable+0x60/0x32c kernel/locking/rwsem.c:1547 mmap_read_lock_killable+0x28/0x8c include/linux/mmap_lock.h:421 get_mmap_lock_carefully mm/mmap_lock.c:197 [inline] lock_mm_and_find_vma+0x2a4/0x2d8 mm/mmap_lock.c:248 do_page_fault+0x50c/0x13cc arch/arm64/mm/fault.c:674 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:789 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:928 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 __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 do_iter_readv_writev+0x460/0x6a8 fs/read_write.c:-1 vfs_writev+0x29c/0x7cc fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2 fs/read_write.c:1202 [inline] __arm64_sys_pwritev2+0x1bc/0x2cc fs/read_write.c:1202 __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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#22); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#22); rlock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz.3.58/6914: #0: ffff0000d6240428 (sb_writers#11){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3096 [inline] #0: ffff0000d6240428 (sb_writers#11){.+.+}-{0:0}, at: vfs_writev+0x21c/0x7cc fs/read_write.c:1055 #1: ffff0000f8033700 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:899 [inline] #1: ffff0000f8033700 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: ntfs_file_write_iter+0x74/0x66c fs/ntfs3/file.c:1160 stack backtrace: CPU: 1 UID: 0 PID: 6914 Comm: syz.3.58 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #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 down_read_killable+0x60/0x32c kernel/locking/rwsem.c:1547 mmap_read_lock_killable+0x28/0x8c include/linux/mmap_lock.h:421 get_mmap_lock_carefully mm/mmap_lock.c:197 [inline] lock_mm_and_find_vma+0x2a4/0x2d8 mm/mmap_lock.c:248 do_page_fault+0x50c/0x13cc arch/arm64/mm/fault.c:674 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:789 do_mem_abort+0x70/0x194 arch/arm64/mm/fault.c:928 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 __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 do_iter_readv_writev+0x460/0x6a8 fs/read_write.c:-1 vfs_writev+0x29c/0x7cc fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2 fs/read_write.c:1202 [inline] __arm64_sys_pwritev2+0x1bc/0x2cc fs/read_write.c:1202 __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