bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean ====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/2857 is trying to acquire lock: ffff88810e301ad0 (&c->btree_root_lock){+.+.}-{3:3}, at: bch2_btree_roots_to_journal_entries+0x38/0x1c0 fs/bcachefs/btree_update_interior.c:2633 but task is already holding lock: ffff88810e300988 (&c->sb_lock){+.+.}-{3:3}, at: bch2_fs_mark_clean+0x33/0x250 fs/bcachefs/sb-clean.c:349 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&c->sb_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x99/0x9a0 kernel/locking/mutex.c:752 bch2_gc_mark_key+0x456/0x4a0 fs/bcachefs/btree_gc.c:600 bch2_gc_btree fs/bcachefs/btree_gc.c:648 [inline] bch2_gc_btrees fs/bcachefs/btree_gc.c:697 [inline] bch2_check_allocations+0x2dd6/0x36a0 fs/bcachefs/btree_gc.c:1220 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:182 [inline] bch2_run_recovery_passes+0xb9/0x220 fs/bcachefs/recovery_passes.c:225 bch2_fs_recovery+0x10e0/0x1840 fs/bcachefs/recovery.c:812 bch2_fs_start+0x1b9/0x270 fs/bcachefs/super.c:1032 bch2_fs_open+0xc7b/0x12f0 fs/bcachefs/super.c:2127 bch2_mount fs/bcachefs/fs.c:1908 [inline] bch2_fs_get_tree+0x25f/0x620 fs/bcachefs/fs.c:2069 vfs_get_tree+0x24/0xb0 fs/super.c:1779 do_new_mount+0x15a/0x3a0 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x177/0x1e0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xa2/0x1b0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&c->btree_root_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x11fe/0x2490 kernel/locking/lockdep.c:5137 lock_acquire+0xeb/0x270 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x99/0x9a0 kernel/locking/mutex.c:752 bch2_btree_roots_to_journal_entries+0x38/0x1c0 fs/bcachefs/btree_update_interior.c:2633 bch2_fs_mark_clean+0x104/0x250 fs/bcachefs/sb-clean.c:376 bch2_fs_read_only+0x414/0x470 fs/bcachefs/super.c:381 __bch2_fs_stop+0x5f/0x260 fs/bcachefs/super.c:613 generic_shutdown_super+0x71/0x110 fs/super.c:641 bch2_kill_sb+0x11/0x20 fs/bcachefs/fs.c:2025 deactivate_locked_super+0x33/0x150 fs/super.c:472 cleanup_mnt+0xe2/0x120 fs/namespace.c:1267 task_work_run+0x82/0xb0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x136/0x280 kernel/entry/common.c:218 do_syscall_64+0xaf/0x1b0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&c->sb_lock); lock(&c->btree_root_lock); lock(&c->sb_lock); lock(&c->btree_root_lock); *** DEADLOCK *** 3 locks held by syz-executor.0/2857: #0: ffff888100ffb0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888100ffb0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888100ffb0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0x2f/0x40 fs/super.c:504 #1: ffff88810e300278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0x57/0x260 fs/bcachefs/super.c:612 #2: ffff88810e300988 (&c->sb_lock){+.+.}-{3:3}, at: bch2_fs_mark_clean+0x33/0x250 fs/bcachefs/sb-clean.c:349 stack backtrace: CPU: 1 PID: 2857 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xa3/0x100 lib/dump_stack.c:114 check_noncircular+0x119/0x140 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x11fe/0x2490 kernel/locking/lockdep.c:5137 lock_acquire+0xeb/0x270 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x99/0x9a0 kernel/locking/mutex.c:752 bch2_btree_roots_to_journal_entries+0x38/0x1c0 fs/bcachefs/btree_update_interior.c:2633 bch2_fs_mark_clean+0x104/0x250 fs/bcachefs/sb-clean.c:376 bch2_fs_read_only+0x414/0x470 fs/bcachefs/super.c:381 __bch2_fs_stop+0x5f/0x260 fs/bcachefs/super.c:613 generic_shutdown_super+0x71/0x110 fs/super.c:641 bch2_kill_sb+0x11/0x20 fs/bcachefs/fs.c:2025 deactivate_locked_super+0x33/0x150 fs/super.c:472 cleanup_mnt+0xe2/0x120 fs/namespace.c:1267 task_work_run+0x82/0xb0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x136/0x280 kernel/entry/common.c:218 do_syscall_64+0xaf/0x1b0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8b80a7e217 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffe54c3cb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8b80a7e217 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe54c3cc50 RBP: 00007ffe54c3cc50 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe54c3dd10 R13: 00007f8b80ac8336 R14: 000000000000c33e R15: 0000000000000002 bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete bcachefs (loop0): shutting down bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 8 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 8 bcachefs (loop0): shutdown complete, journal seq 9 bcachefs (loop0): marking filesystem clean bcachefs (loop0): shutdown complete