BUG: MAX_LOCK_DEPTH too low! turning off the locking correctness validator. depth: 48 max: 48! 48 locks held by syz.2.241/7645: #0: ffff0000e3a9a420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:409 #1: ffff0000eeacb528 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff0000eeacb528 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 #2: ffff0000e6500ab8 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x134/0x274 fs/bcachefs/io_misc.c:290 #3: ffff0000e65042d8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:115 #4: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #5: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #5: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #6: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #6: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #7: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #7: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #8: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #8: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #9: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #9: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #10: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #10: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #11: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #11: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #12: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #12: ffff0000cce4c870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #13: ffff0000f04db748 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #14: ffff0000f04db8a0 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #15: ffff0000f04db9f8 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #16: ffff0000f04dbb50 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #17: ffff0000f04dbca8 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #18: ffff0000f04dbe00 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #19: ffff0000f04daf38 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #20: ffff0000f04db340 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #21: ffff0000dd031070 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #22: ffff0000dd031870 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #23: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #24: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #25: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #26: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #27: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #28: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #29: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: six_trylock_type+0x1c/0x4c fs/bcachefs/six.h:206 #30: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #31: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #31: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #32: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #32: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #33: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #33: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #34: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #34: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #35: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #35: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #36: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment fs/bcachefs/btree_locking.h:248 [inline] #36: ffff0000c750b070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x6a0/0xa94 fs/bcachefs/btree_locking.c:509 #37: ffff0000dd032870 (&dev->mutex){....}-{3:3}, at: six_relock_type+0x24/0x5c fs/bcachefs/six.h:288 #38: ffff0000e6526750 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x590/0x15a0 fs/bcachefs/btree_update_interior.c:1195 #39: ffff0000e651dc78 (&wp->lock){+.+.}-{3:3}, at: bch2_trans_mutex_lock_norelock fs/bcachefs/alloc_foreground.c:41 [inline] #39: ffff0000e651dc78 (&wp->lock){+.+.}-{3:3}, at: writepoint_find fs/bcachefs/alloc_foreground.c:1302 [inline] #39: ffff0000e651dc78 (&wp->lock){+.+.}-{3:3}, at: bch2_alloc_sectors_start_trans+0x290/0x1958 fs/bcachefs/alloc_foreground.c:1410 #40: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: btree_path_copy fs/bcachefs/btree_iter.c:1228 [inline] #40: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: btree_path_clone fs/bcachefs/btree_iter.c:1236 [inline] #40: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_path_make_mut+0x1b8/0x508 fs/bcachefs/btree_iter.c:1249 #41: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: btree_path_copy fs/bcachefs/btree_iter.c:1228 [inline] #41: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: btree_path_clone fs/bcachefs/btree_iter.c:1236 [inline] #41: ffff0000dd037870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_path_make_mut+0x1b8/0x508 fs/bcachefs/btree_iter.c:1249 #42: ffff0000f04da1c8 (&dev->mutex){....}-{3:3}, at: six_trylock_intent+0x18/0x48 fs/bcachefs/six.h:366 #43: ffff0000e6504ba8 (&c->freelist_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #43: ffff0000e6504ba8 (&c->freelist_lock){+.+.}-{2:2}, at: __try_alloc_bucket+0x4c8/0xf2c fs/bcachefs/alloc_foreground.c:235 #44: ffff0000e651c8a0 (&ob->lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #44: ffff0000e651c8a0 (&ob->lock){+.+.}-{2:2}, at: __try_alloc_bucket+0x810/0xf2c fs/bcachefs/alloc_foreground.c:255 #45: ffff800080017c60 (&(&bat_priv->nc.work)->timer){..-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:41 [inline] #45: ffff800080017c60 (&(&bat_priv->nc.work)->timer){..-.}-{0:0}, at: call_timer_fn+0xd0/0x8e8 kernel/time/timer.c:1782 #46: ffff80008f4b7be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:328 #47: ffff0000c1088018 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x854/0x12ac INFO: lockdep is turned off. CPU: 1 PID: 7645 Comm: syz.2.241 Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 __lock_acquire+0x1d5c/0x763c kernel/locking/lockdep.c:5159 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 __queue_work+0x854/0x12ac delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:2506 call_timer_fn+0x1b4/0x8e8 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x59c/0x7b4 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2447 handle_softirqs+0x2e4/0xbfc kernel/softirq.c:554 __do_softirq+0x14/0x20 kernel/softirq.c:588 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x1d8/0x434 kernel/softirq.c:637 irq_exit_rcu+0x14/0x84 kernel/softirq.c:649 __el1_irq arch/arm64/kernel/entry-common.c:537 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] lock_acquire+0x27c/0x728 kernel/locking/lockdep.c:5757 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __try_alloc_bucket+0x810/0xf2c fs/bcachefs/alloc_foreground.c:255 try_alloc_bucket fs/bcachefs/alloc_foreground.c:364 [inline] bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:527 [inline] bch2_bucket_alloc_trans+0x15f0/0x29e4 fs/bcachefs/alloc_foreground.c:649 bch2_bucket_alloc_set_trans+0x490/0x9e4 fs/bcachefs/alloc_foreground.c:810 __open_bucket_add_buckets+0xfb4/0x18b4 fs/bcachefs/alloc_foreground.c:1058 open_bucket_add_buckets+0x160/0x220 fs/bcachefs/alloc_foreground.c:1102 bch2_alloc_sectors_start_trans+0xa74/0x1958 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:333 [inline] bch2_btree_reserve_get+0x4ac/0xf54 fs/bcachefs/btree_update_interior.c:547 bch2_btree_update_start+0xe78/0x15a0 fs/bcachefs/btree_update_interior.c:1245 bch2_btree_split_leaf+0x11c/0x734 fs/bcachefs/btree_update_interior.c:1851 bch2_trans_commit_error+0x2a4/0x1068 fs/bcachefs/btree_trans_commit.c:918 __bch2_trans_commit+0x35e4/0x592c fs/bcachefs/btree_trans_commit.c:1138 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline] bch2_extent_update+0x3d0/0x9b4 fs/bcachefs/io_write.c:326 bch2_fpunch_at+0x640/0xd98 fs/bcachefs/io_misc.c:184 __bch2_resume_logged_op_truncate+0x404/0x620 fs/bcachefs/io_misc.c:260 bch2_truncate+0x198/0x274 fs/bcachefs/io_misc.c:291 bchfs_truncate+0x668/0xa74 fs/bcachefs/fs-io.c:476 bch2_setattr+0x198/0x230 fs/bcachefs/fs.c:926 notify_change+0x9d4/0xc84 fs/attr.c:497 do_truncate+0x1c0/0x28c fs/open.c:65 handle_truncate fs/namei.c:3355 [inline] do_open fs/namei.c:3705 [inline] path_openat+0x2428/0x2ae8 fs/namei.c:3860 do_filp_open+0x1bc/0x3cc fs/namei.c:3887 do_sys_openat2+0x124/0x1b8 fs/open.c:1413 do_sys_open fs/open.c:1428 [inline] __do_sys_openat fs/open.c:1444 [inline] __se_sys_openat fs/open.c:1439 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1439 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598