rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=c5a/1/0x4000000000000000 softirq=8148/8149 fqs=5227 (t=10500 jiffies g=5777 q=883) NMI backtrace for cpu 0 CPU: 0 PID: 7373 Comm: syz-executor.2 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x10c/0x14b lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x1c6/0x24a kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline] check_cpu_stall kernel/rcu/tree_stall.h:697 [inline] rcu_pending kernel/rcu/tree.c:3830 [inline] rcu_sched_clock_irq.cold+0x606/0x10b4 kernel/rcu/tree.c:2650 update_process_times+0x131/0x1a0 kernel/time/timer.c:1796 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x19e/0xb90 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x2f6/0x910 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x13e/0x520 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:659 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:145 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5513 [inline] RIP: 0010:lock_acquire+0x639/0x850 kernel/locking/lockdep.c:5475 Code: 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 80 01 00 00 48 83 3d 90 42 e3 07 00 74 5b fb 66 0f 1f 44 00 00 06 fc ff ff 0f 0b e9 53 fa ff ff 0f 0b 0f 0b 0f 0b e9 e0 fe ff RSP: 0018:ffffc900045a6cd8 EFLAGS: 00000282 RAX: 1ffffffff126dec8 RBX: 1ffff920008b4d9d RCX: 1ffff920008b4d84 RDX: dffffc0000000000 RSI: ffffffff87cb2c80 RDI: ffffffff88128200 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8bfa4c97 R10: fffffbfff17f4992 R11: 615f6e616d746162 R12: 0000000000000000 R13: ffff888125949718 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] batadv_tt_local_purge_pending_clients+0xf2/0x3b0 net/batman-adv/translation-table.c:3683 batadv_tt_local_resize_to_mtu+0x80/0xe0 net/batman-adv/translation-table.c:3986 batadv_hardif_activate_interface.part.0.cold+0x141/0x1b4 net/batman-adv/hard-interface.c:655 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:802 [inline] batadv_hardif_enable_interface+0x96b/0xa30 net/batman-adv/hard-interface.c:794 batadv_softif_slave_add+0x7a/0xf0 net/batman-adv/soft-interface.c:858 do_setlink+0x7f1/0x2f10 net/core/rtnetlink.c:2715 __rtnl_newlink+0xab2/0x1350 net/core/rtnetlink.c:3376 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x32f/0x860 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2350 ___sys_sendmsg+0xd3/0x150 net/socket.c:2404 __sys_sendmsg+0xb2/0x140 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x463ca9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f06a3982188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000463ca9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000004ae538 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffc7a0a15ff R14: 00007f06a3982300 R15: 0000000000022000