====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc6-syzkaller-17549-gca72d58361ee #0 Not tainted ------------------------------------------------------ syz-executor.2/4468 is trying to acquire lock: ffff0000c6dc08c0 (&rl->lock){++++}-{3:3}, at: ntfs_read_block+0x2d0/0x1110 fs/ntfs/aops.c:248 but task is already holding lock: ffff0000c6dc4f10 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x40/0xfc fs/ntfs/mft.c:154 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->mrec_lock){+.+.}-{3:3}: __mutex_lock_common+0xd4/0xca8 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+0x40/0xfc fs/ntfs/mft.c:154 ntfs_truncate+0xd8/0xf6c fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x1ac/0x228 fs/ntfs/inode.c:2914 notify_change+0x738/0x7d0 fs/attr.c:482 do_truncate+0x10c/0x154 fs/open.c:65 vfs_truncate+0x1d8/0x248 fs/open.c:111 do_sys_truncate+0x94/0x140 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x20/0x30 fs/open.c:144 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #0 (&rl->lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0xf0/0x1dc kernel/locking/lockdep.c:5668 down_read+0x5c/0x78 kernel/locking/rwsem.c:1509 ntfs_read_block+0x2d0/0x1110 fs/ntfs/aops.c:248 ntfs_read_folio+0x594/0x758 fs/ntfs/aops.c:436 filemap_read_folio+0xc4/0x468 mm/filemap.c:2426 do_read_cache_folio+0x1c8/0x588 mm/filemap.c:3553 do_read_cache_page mm/filemap.c:3595 [inline] read_cache_page+0x40/0x174 mm/filemap.c:3604 read_mapping_page include/linux/pagemap.h:755 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0xb4/0x109c fs/ntfs/mft.c:480 write_mft_record_nolock+0x958/0xc70 fs/ntfs/mft.c:805 write_mft_record+0xe4/0x230 fs/ntfs/mft.h:95 __ntfs_write_inode+0x32c/0x554 fs/ntfs/inode.c:3050 ntfs_commit_inode fs/ntfs/inode.h:300 [inline] ntfs_put_super+0x4c/0x818 fs/ntfs/super.c:2260 generic_shutdown_super+0x94/0x198 fs/super.c:492 kill_block_super+0x30/0x78 fs/super.c:1386 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1291 __cleanup_mnt+0x20/0x30 fs/namespace.c:1298 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1302 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->mrec_lock); lock(&rl->lock); lock(&ni->mrec_lock); lock(&rl->lock); *** DEADLOCK *** 2 locks held by syz-executor.2/4468: #0: ffff00011f9cd0e0 (&type->s_umount_key#71){++++}-{3:3}, at: deactivate_super+0xc8/0xd4 fs/super.c:362 #1: ffff0000c6dc4f10 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x40/0xfc fs/ntfs/mft.c:154 stack backtrace: CPU: 0 PID: 4468 Comm: syz-executor.2 Not tainted 6.2.0-rc6-syzkaller-17549-gca72d58361ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call trace: dump_backtrace+0x1c4/0x1f0 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+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x2c4/0x2c8 kernel/locking/lockdep.c:2055 check_noncircular+0x14c/0x154 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0xf0/0x1dc kernel/locking/lockdep.c:5668 down_read+0x5c/0x78 kernel/locking/rwsem.c:1509 ntfs_read_block+0x2d0/0x1110 fs/ntfs/aops.c:248 ntfs_read_folio+0x594/0x758 fs/ntfs/aops.c:436 filemap_read_folio+0xc4/0x468 mm/filemap.c:2426 do_read_cache_folio+0x1c8/0x588 mm/filemap.c:3553 do_read_cache_page mm/filemap.c:3595 [inline] read_cache_page+0x40/0x174 mm/filemap.c:3604 read_mapping_page include/linux/pagemap.h:755 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0xb4/0x109c fs/ntfs/mft.c:480 write_mft_record_nolock+0x958/0xc70 fs/ntfs/mft.c:805 write_mft_record+0xe4/0x230 fs/ntfs/mft.h:95 __ntfs_write_inode+0x32c/0x554 fs/ntfs/inode.c:3050 ntfs_commit_inode fs/ntfs/inode.h:300 [inline] ntfs_put_super+0x4c/0x818 fs/ntfs/super.c:2260 generic_shutdown_super+0x94/0x198 fs/super.c:492 kill_block_super+0x30/0x78 fs/super.c:1386 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1291 __cleanup_mnt+0x20/0x30 fs/namespace.c:1298 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1302 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591