Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning: ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 6148 at kernel/locking/lockdep.c:2090 print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2090 Modules linked in: CPU: 1 UID: 0 PID: 6148 Comm: syz-executor.2 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2090 Code: 90 55 53 89 fb e8 27 18 38 03 89 c5 e8 30 13 ff ff 85 ed 74 19 83 fb ff 74 1b 90 48 c7 c7 20 eb 0a 8c 89 de e8 68 ce e4 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc 48 c7 c7 c0 ea 0a 8c e8 e0 3b 4a RSP: 0018:ffffc90004966a48 EFLAGS: 00010046 RAX: 7a8fc0f02ee71b00 RBX: 00000000ffffffff RCX: ffff8880262dda00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8155fd62 R09: 1ffff110170e519a R10: dffffc0000000000 R11: ffffed10170e519b R12: dffffc0000000001 R13: ffffffff96c4c268 R14: ffffffff93c89b88 R15: ffffffff96c4c1f8 FS: 000055558ef28480(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558ef31938 CR3: 0000000078460000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage kernel/locking/lockdep.c:2829 [inline] check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x4809/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 seqcount_lockdep_reader_access+0xfc/0x220 include/linux/seqlock.h:72 ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:810 __hrtimer_start_range_ns kernel/time/hrtimer.c:1237 [inline] hrtimer_start_range_ns+0x35f/0xca0 kernel/time/hrtimer.c:1293 dl_server_stop+0x43/0x90 kernel/sched/deadline.c:1660 dequeue_entities+0xc07/0xfb0 kernel/sched/fair.c:7161 pick_next_entity kernel/sched/fair.c:5627 [inline] pick_task_fair+0xe4/0x260 kernel/sched/fair.c:8860 pick_next_task_fair+0x23/0xc90 kernel/sched/fair.c:8880 __pick_next_task+0xdd/0x400 kernel/sched/core.c:6023 __schedule+0x776/0x4be0 kernel/sched/core.c:6709 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 io_schedule+0x8d/0x110 kernel/sched/core.c:7681 bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:247 __wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:105 [inline] do_get_write_access+0x121/0xe60 fs/jbd2/transaction.c:1096 jbd2_journal_get_write_access+0x1ee/0x240 fs/jbd2/transaction.c:1245 __ext4_journal_get_write_access+0x1c8/0x680 fs/ext4/ext4_jbd2.c:239 ext4_reserve_inode_write+0x271/0x360 fs/ext4/inode.c:5830 __ext4_mark_inode_dirty+0x1ec/0x880 fs/ext4/inode.c:6004 ext4_evict_inode+0x84a/0xf50 fs/ext4/inode.c:256 evict+0x4e8/0x9a0 fs/inode.c:796 do_unlinkat+0x512/0x830 fs/namei.c:4594 __do_sys_unlink fs/namei.c:4635 [inline] __se_sys_unlink fs/namei.c:4633 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4633 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa6d547d557 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0394af88 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa6d547d557 RDX: 00007fff0394afb0 RSI: 00007fff0394b040 RDI: 00007fff0394b040 RBP: 00007fff0394b040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff0394c100 R13: 00007fa6d54c93b9 R14: 000000000003aa86 R15: 0000000000000005