ntfs: (device loop0): parse_options(): Option utf8 is no longer supported, using option nls=utf8. Please use option nls=utf8 in the future and make sure utf8 is compiled either as a module or into the kernel. ntfs: volume version 3.1. ====================================================== WARNING: possible circular locking dependency detected 6.1.20-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/15606 is trying to acquire lock: ffff0000e0579210 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154 but task is already holding lock: ffff0000e0579180 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x174/0x2118 fs/ntfs/inode.c:2378 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rl->lock){++++}-{3:3}: down_read+0x5c/0x78 kernel/locking/rwsem.c:1520 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_read_folio+0xf40/0x1d70 fs/ntfs/aops.c:436 filemap_read_folio+0x14c/0x39c mm/filemap.c:2407 do_read_cache_folio+0x24c/0x544 mm/filemap.c:3535 do_read_cache_page mm/filemap.c:3577 [inline] read_cache_page+0x6c/0x180 mm/filemap.c:3586 read_mapping_page include/linux/pagemap.h:756 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0x1cc/0x1890 fs/ntfs/mft.c:480 write_mft_record_nolock+0x100c/0x1630 fs/ntfs/mft.c:787 write_mft_record+0x144/0x1bc fs/ntfs/mft.h:95 __ntfs_write_inode+0x5cc/0xa78 fs/ntfs/inode.c:3050 ntfs_write_inode+0x68/0x90 fs/ntfs/super.c:2656 write_inode fs/fs-writeback.c:1440 [inline] __writeback_single_inode+0x8d8/0x1ec8 fs/fs-writeback.c:1652 writeback_sb_inodes+0x9c0/0x1844 fs/fs-writeback.c:1878 wb_writeback+0x4f8/0x1580 fs/fs-writeback.c:2052 wb_do_writeback fs/fs-writeback.c:2195 [inline] wb_workfn+0x460/0x11b8 fs/fs-writeback.c:2235 process_one_work+0x868/0x16f4 kernel/workqueue.c:2289 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 -> #0 (&ni->mrec_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x300/0x8e4 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154 ntfs_truncate+0x1d4/0x2118 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x260/0x320 fs/ntfs/inode.c:2914 notify_change+0xc24/0xec0 fs/attr.c:482 do_truncate+0x1c0/0x28c fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x1fa0/0x2548 fs/namei.c:3714 do_filp_open+0x1bc/0x3cc fs/namei.c:3741 do_sys_openat2+0x128/0x3d8 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1337 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rl->lock); lock(&ni->mrec_lock); lock(&rl->lock); lock(&ni->mrec_lock); *** DEADLOCK *** 3 locks held by syz-executor.0/15606: #0: ffff00011a3c0460 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000e05794f0 (&sb->s_type->i_mutex_key#34){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff0000e05794f0 (&sb->s_type->i_mutex_key#34){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 #2: ffff0000e0579180 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x174/0x2118 fs/ntfs/inode.c:2378 stack backtrace: CPU: 0 PID: 15606 Comm: syz-executor.0 Not tainted 6.1.20-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x300/0x8e4 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 map_mft_record+0x64/0x7b4 fs/ntfs/mft.c:154 ntfs_truncate+0x1d4/0x2118 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x260/0x320 fs/ntfs/inode.c:2914 notify_change+0xc24/0xec0 fs/attr.c:482 do_truncate+0x1c0/0x28c fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x1fa0/0x2548 fs/namei.c:3714 do_filp_open+0x1bc/0x3cc fs/namei.c:3741 do_sys_openat2+0x128/0x3d8 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1337 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581