syz-executor.3: attempt to access beyond end of device loop3: rw=2049, sector=79872, nr_sectors = 2048 limit=63271 ====================================================== WARNING: possible circular locking dependency detected 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Not tainted ------------------------------------------------------ syz-executor.3/20187 is trying to acquire lock: ffff888052956b70 (&sb->s_type->i_mutex_key#40){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] ffff888052956b70 (&sb->s_type->i_mutex_key#40){+.+.}-{3:3}, at: f2fs_release_file+0x9b/0x100 fs/f2fs/file.c:1866 but task is already holding lock: ffff8880281b0448 (&sbi->node_write){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2087 [inline] ffff8880281b0448 (&sbi->node_write){++++}-{3:3}, at: f2fs_write_single_data_page+0xa10/0x1d50 fs/f2fs/data.c:2842 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->node_write){++++}-{3:3}: reacquire_held_locks+0x3aa/0x660 kernel/locking/lockdep.c:5216 __lock_release kernel/locking/lockdep.c:5405 [inline] lock_release+0x36f/0x9d0 kernel/locking/lockdep.c:5711 up_write+0x79/0x580 kernel/locking/rwsem.c:1625 f2fs_write_checkpoint+0x13a4/0x1f90 fs/f2fs/checkpoint.c:1651 f2fs_issue_checkpoint+0x2e6/0x4d0 fs/f2fs/checkpoint.c:1858 sync_filesystem+0x1c0/0x220 fs/sync.c:66 generic_shutdown_super+0x6f/0x340 fs/super.c:473 kill_block_super+0x84/0xf0 fs/super.c:1407 kill_f2fs_super+0x303/0x3d0 fs/f2fs/super.c:4702 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&sbi->cp_rwsem){++++}-{3:3}: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2087 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2130 [inline] f2fs_convert_inline_inode+0x578/0x800 fs/f2fs/inline.c:218 f2fs_ioc_start_atomic_write+0x21a/0x9d0 fs/f2fs/file.c:2076 __f2fs_ioctl+0x1b4e/0xb8a0 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&sb->s_type->i_mutex_key#40){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3842 __lock_acquire+0x1295/0x2000 kernel/locking/lockdep.c:5074 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 down_write+0x3a/0x50 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:775 [inline] f2fs_release_file+0x9b/0x100 fs/f2fs/file.c:1866 __fput+0x3b7/0x890 fs/file_table.c:321 task_work_run+0x24a/0x300 kernel/task_work.c:179 get_signal+0x1606/0x17e0 kernel/signal.c:2650 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &sb->s_type->i_mutex_key#40 --> &sbi->cp_rwsem --> &sbi->node_write Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&sbi->node_write); lock(&sbi->cp_rwsem); lock(&sbi->node_write); lock(&sb->s_type->i_mutex_key#40); *** DEADLOCK *** 1 lock held by syz-executor.3/20187: #0: ffff8880281b0448 (&sbi->node_write){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2087 [inline] #0: ffff8880281b0448 (&sbi->node_write){++++}-{3:3}, at: f2fs_write_single_data_page+0xa10/0x1d50 fs/f2fs/data.c:2842 stack backtrace: CPU: 0 PID: 20187 Comm: syz-executor.3 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3842 __lock_acquire+0x1295/0x2000 kernel/locking/lockdep.c:5074 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 down_write+0x3a/0x50 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:775 [inline] f2fs_release_file+0x9b/0x100 fs/f2fs/file.c:1866 __fput+0x3b7/0x890 fs/file_table.c:321 task_work_run+0x24a/0x300 kernel/task_work.c:179 get_signal+0x1606/0x17e0 kernel/signal.c:2650 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2735c8c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2736969168 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: fffffffffffffffb RBX: 00007f2735dabf80 RCX: 00007f2735c8c169 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f2735ce7ca1 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000001400 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff404700f R14: 00007f2736969300 R15: 0000000000022000