------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 23185 at kernel/locking/lockdep.c:1960 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Modules linked in: CPU: 0 PID: 23185 Comm: syz-executor.2 Not tainted 5.9.0-rc7-next-20200930-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 7f 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 7b e5 c0 06 <0f> 0b 5b 5d 41 5c c3 0f 0b e8 62 82 e9 06 85 c0 74 d7 48 c7 c0 38 RSP: 0018:ffffc90008acedb0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815df1a5 RDI: fffff52001159da8 RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae420f8b R10: 0000000000000000 R11: 207065646b636f6c R12: ffff88808dd58300 R13: dffffc0000000000 R14: 0000000000000004 R15: 0000000000000000 FS: 00007f70d70fd700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000380 CR3: 00000000a717f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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 xa_node_free lib/xarray.c:258 [inline] xas_free_nodes+0x24a/0x460 lib/xarray.c:546 __xas_store+0x653/0x1a60 lib/xarray.c:816 xas_store+0x20/0x100 lib/xarray.c:859 page_cache_delete+0x6e3/0x890 mm/filemap.c:138 __delete_from_page_cache mm/filemap.c:239 [inline] delete_from_page_cache+0x15d/0x240 mm/filemap.c:274 truncate_inode_page+0x85/0xd0 mm/truncate.c:228 shmem_undo_range+0x5ef/0x1b00 mm/shmem.c:949 shmem_truncate_range mm/shmem.c:1058 [inline] shmem_setattr+0x67a/0xc70 mm/shmem.c:1117 notify_change+0xb60/0x10a0 fs/attr.c:336 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2910 [inline] do_open fs/namei.c:3256 [inline] path_openat+0x2054/0x2730 fs/namei.c:3369 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_openat fs/open.c:1200 [inline] __se_sys_openat fs/open.c:1195 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1195 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:00007f70d70fcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000000228c0 RCX: 000000000045dd99 RDX: 000000000000275a RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 000000000118c010 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4 R13: 00007ffdb7fc536f R14: 00007f70d70fd9c0 R15: 000000000118bfd4