------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 21039 at kernel/locking/lockdep.c:1960 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Modules linked in: CPU: 1 PID: 21039 Comm: syz-executor.3 Not tainted 5.9.0-rc7-next-20200929-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Code: e2 08 00 74 2c 48 c7 c7 c0 af a6 8d e8 49 51 01 00 66 90 85 db 75 05 5b 5d 41 5c c3 89 ee 48 c7 c7 20 e8 ab 88 e8 cb 15 c1 06 <0f> 0b 5b 5d 41 5c c3 0f 0b e8 b2 ba e9 06 85 c0 74 d7 48 c7 c0 78 RSP: 0018:ffffc9000a24ec50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815df155 RDI: fffff52001449d7c RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae520f8b R10: 0000000000000000 R11: 207065646b636f6c R12: ffff88804c4802c0 R13: dffffc0000000000 R14: 0000000000000004 R15: 0000000000000000 FS: 00007fce354c9700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31927000 CR3: 0000000049221000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage+0x6b4/0xc60 kernel/locking/lockdep.c:2585 check_prev_add kernel/locking/lockdep.c:2823 [inline] check_prevs_add kernel/locking/lockdep.c:2944 [inline] validate_chain kernel/locking/lockdep.c:3562 [inline] __lock_acquire+0x2873/0x56d0 kernel/locking/lockdep.c:4796 lock_acquire+0x1f2/0xaa0 kernel/locking/lockdep.c:5398 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 alloc_object lib/debugobjects.c:239 [inline] __debug_object_init+0x5c6/0xd10 lib/debugobjects.c:548 debug_object_init lib/debugobjects.c:595 [inline] debug_object_activate+0x32c/0x3e0 lib/debugobjects.c:681 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] __call_rcu kernel/rcu/tree.c:2943 [inline] call_rcu+0x2c/0x7d0 kernel/rcu/tree.c:3030 put_task_struct_rcu_user+0x7f/0xb0 kernel/exit.c:178 finish_task_switch+0x548/0x7a0 kernel/sched/core.c:3651 context_switch kernel/sched/core.c:3781 [inline] __schedule+0xecd/0x2200 kernel/sched/core.c:4527 preempt_schedule_irq+0xbf/0x1b0 kernel/sched/core.c:4788 irqentry_exit_cond_resched kernel/entry/common.c:358 [inline] irqentry_exit_cond_resched kernel/entry/common.c:350 [inline] irqentry_exit+0x65/0x90 kernel/entry/common.c:388 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:653 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:105 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:838 [inline] RIP: 0010:zone_span_seqbegin include/linux/memory_hotplug.h:93 [inline] RIP: 0010:page_outside_zone_boundaries mm/page_alloc.c:561 [inline] RIP: 0010:bad_range+0x10d/0x460 mm/page_alloc.c:590 Code: 10 48 c7 c0 e8 f0 3c 8a 48 c1 e8 03 80 3c 28 00 0f 85 c3 02 00 00 48 83 3d d7 2d 8f 08 00 0f 84 bd 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 4c 8d 8b 98 00 00 00 4c 89 c8 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc9000a24f550 EFLAGS: 00000286 RAX: 1ffffffff1479e1d RBX: ffff88812fffb700 RCX: ffffc9000ef26000 RDX: ffffffff81ae655f RSI: 0000000000000000 RDI: 0000000000000286 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8d731a6f R10: ffffea000200f600 R11: 0000000000000000 R12: 00000000000803d8 R13: fffffbfff1479e1c R14: 1ffffffff1479e1e R15: ffff88812fffb7a0 rmqueue mm/page_alloc.c:3420 [inline] get_page_from_freelist+0x140f/0x3cb0 mm/page_alloc.c:3839 __alloc_pages_nodemask+0x2d6/0x730 mm/page_alloc.c:4884 alloc_pages_current+0x191/0x2a0 mm/mempolicy.c:2271 alloc_pages include/linux/gfp.h:545 [inline] __page_cache_alloc mm/filemap.c:977 [inline] __page_cache_alloc+0x379/0x450 mm/filemap.c:962 pagecache_get_page+0x392/0x1460 mm/filemap.c:1828 grab_cache_page_write_begin+0x64/0x90 mm/filemap.c:3471 ext4_da_write_begin+0x35c/0x1150 fs/ext4/inode.c:2965 generic_perform_write+0x20a/0x4f0 mm/filemap.c:3521 ext4_buffered_write_iter+0x232/0x4a0 fs/ext4/file.c:269 ext4_file_write_iter+0x1f3/0x13e0 fs/ext4/file.c:660 call_write_iter include/linux/fs.h:1887 [inline] new_sync_write+0x426/0x650 fs/read_write.c:517 vfs_write+0x57d/0x700 fs/read_write.c:595 ksys_write+0x12d/0x250 fs/read_write.c:648 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dd99 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fce354c8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000039900 RCX: 000000000045dd99 RDX: 0000000000032600 RSI: 0000000020000440 RDI: 0000000000000007 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc14aa823f R14: 00007fce354c99c0 R15: 000000000118bf2c