loop4: detected capacity change from 0 to 432 BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 21156 Comm: syz-executor.4 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 add_chain_cache kernel/locking/lockdep.c:3637 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3736 [inline] validate_chain kernel/locking/lockdep.c:3757 [inline] __lock_acquire.cold+0x372/0x3ab kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 remove_entity_load_avg+0x76/0x250 kernel/sched/fair.c:3929 migrate_task_rq_fair+0x88/0x500 kernel/sched/fair.c:7024 set_task_cpu+0xdc/0x5b0 kernel/sched/core.c:3035 try_to_wake_up+0x42f/0x1570 kernel/sched/core.c:4091 wake_up_worker kernel/workqueue.c:855 [inline] insert_work+0x2a0/0x370 kernel/workqueue.c:1368 __queue_work+0x5ca/0xee0 kernel/workqueue.c:1519 queue_work_on+0xee/0x110 kernel/workqueue.c:1546 queue_work include/linux/workqueue.h:501 [inline] loop_queue_work drivers/block/loop.c:1065 [inline] loop_queue_rq+0x5f5/0xf60 drivers/block/loop.c:2177 __blk_mq_issue_directly block/blk-mq.c:1990 [inline] __blk_mq_try_issue_directly+0x487/0x7a0 block/blk-mq.c:2046 blk_mq_try_issue_directly+0xc3/0x190 block/blk-mq.c:2077 blk_mq_submit_bio+0x14bf/0x18b0 block/blk-mq.c:2297 __submit_bio+0x77b/0x8b0 block/blk-core.c:929 __submit_bio_noacct_mq block/blk-core.c:1009 [inline] submit_bio_noacct+0x6f8/0x910 block/blk-core.c:1039 submit_bio+0x1ea/0x470 block/blk-core.c:1101 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3054 submit_bh fs/buffer.c:3060 [inline] __bread_slow fs/buffer.c:1180 [inline] __bread_gfp+0x17f/0x3c0 fs/buffer.c:1382 sb_bread include/linux/buffer_head.h:303 [inline] exfat_read_boot_sector fs/exfat/super.c:423 [inline] __exfat_fill_super fs/exfat/super.c:577 [inline] exfat_fill_super+0x30b/0x2aa0 fs/exfat/super.c:645 get_tree_bdev+0x440/0x760 fs/super.c:1293 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbc6502201a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc62595fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fbc6502201a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fbc62596000 RBP: 00007fbc62596040 R08: 00007fbc62596040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fbc62596000 R15: 0000000020013b00 exfat filesystem being mounted at /root/syzkaller-testdir956835239/syzkaller.V8L5sq/1002/file0 supports timestamps until 2107 (0x10391447f)