------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 12423 at kernel/locking/lockdep.c:2022 print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022 Modules linked in: CPU: 1 PID: 12423 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022 Code: 79 ff ff ff 0f 1f 40 00 55 53 89 fb e8 47 7c 7a 02 89 c5 e8 50 e4 fe ff 85 ed 74 10 48 c7 c7 20 2e 0b 8a 89 de e8 de 92 40 08 <0f> 0b 5b 5d c3 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 RSP: 0018:ffffc900057fe668 EFLAGS: 00010046 RAX: 8de586cb0b492d00 RBX: 00000000ffffffff RCX: ffff888024519dc0 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed1017224f24 R10: ffffed1017224f24 R11: 1ffff11017224f23 R12: 000000000000001e R13: 00000000000003dd R14: ffffffff8fa62670 R15: ffffffff92c0e208 FS: 00007f3a5bbeb6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a5bbe9f78 CR3: 0000000043e77000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage kernel/locking/lockdep.c:-1 [inline] check_prev_add kernel/locking/lockdep.c:3057 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x5968/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 do_write_seqcount_begin_nested include/linux/seqlock.h:519 [inline] do_write_seqcount_begin include/linux/seqlock.h:545 [inline] psi_group_change+0x113/0x1150 kernel/sched/psi.c:710 psi_task_switch+0x495/0x810 kernel/sched/psi.c:882 psi_sched_switch kernel/sched/stats.h:148 [inline] __schedule+0x1cef/0x43b0 kernel/sched/core.c:6371 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6780 irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:lock_acquire+0x1f2/0x3f0 kernel/locking/lockdep.c:5627 Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f6 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b RSP: 0018:ffffc900057feee0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 8de586cb0b492d00 RDX: ffffffff8f946b70 RSI: ffffffff8a0b2840 RDI: ffffffff8a599300 RBP: ffffc900057feff8 R08: dffffc0000000000 R09: fffffbfff250af02 R10: fffffbfff250af02 R11: 1ffffffff250af01 R12: ffffffff8c1dc080 R13: 1ffff92000affde8 R14: 0000000000000246 R15: dffffc0000000000 __fs_reclaim_acquire mm/page_alloc.c:4580 [inline] fs_reclaim_acquire+0x6d/0x100 mm/page_alloc.c:4594 might_alloc include/linux/sched/mm.h:206 [inline] slab_pre_alloc_hook+0x20/0xc0 mm/slab.h:492 slab_alloc_node mm/slub.c:3134 [inline] kmem_cache_alloc_node+0x47/0x2d0 mm/slub.c:3256 __alloc_skb+0xf4/0x750 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1162 [inline] nlmsg_new include/net/netlink.h:953 [inline] genlmsg_new include/net/genetlink.h:411 [inline] __send_and_alloc_skb drivers/net/team/team.c:2455 [inline] team_nl_send_options_get+0x15c/0x1080 drivers/net/team/team.c:2478 team_nl_send_event_options_get drivers/net/team/team.c:2896 [inline] team_nl_cmd_options_set+0xabe/0xd70 drivers/net/team/team.c:2700 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0xbc6/0xf40 net/netlink/genetlink.c:792 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x190/0x250 net/socket.c:2526 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3a5c869959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3a5bbeb0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3a5c988f80 RCX: 00007f3a5c869959 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007f3a5c8c5c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f3a5c988f80 R15: 00007ffdab943aa8 ---------------- Code disassembly (best guess): 0: 00 9c 8f 84 24 80 00 add %bl,0x802484(%rdi,%rcx,4) 7: 00 00 add %al,(%rax) 9: f6 84 24 81 00 00 00 testb $0x2,0x81(%rsp) 10: 02 11: 0f 85 f6 00 00 00 jne 0x10d 17: 41 f7 c6 00 02 00 00 test $0x200,%r14d 1e: 74 01 je 0x21 20: fb sti 21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp) 28: e0 45 * 2a: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) <-- trapping instruction 31: 00 00 33: 66 43 c7 44 3d 09 00 movw $0x0,0x9(%r13,%r15,1) 3a: 00 3b: 43 rex.XB 3c: c6 .byte 0xc6 3d: 44 rex.R 3e: 3d .byte 0x3d 3f: 0b .byte 0xb