rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10493 ticks this GP) idle=b49/1/0x4000000000000000 softirq=131901/131901 fqs=5232 (t=10502 jiffies g=260313 q=10366) NMI backtrace for cpu 1 CPU: 1 PID: 18175 Comm: syz-executor.0 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3880 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390 Code: 1d ad 59 bc 7e 65 8b 05 a6 59 bc 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 f5 31 09 00 e8 70 d6 35 00 fb 65 8b 05 88 59 bc 7e <85> c0 74 58 5b 5d c3 65 8b 05 d6 60 bc 7e 85 c0 75 a2 0f 0b eb 9e RSP: 0018:ffffc900169f7870 EFLAGS: 00000206 RAX: 0000000000000201 RBX: 00000000fffffe00 RCX: 1ffffffff1fab202 RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000 RBP: ffffffff88d4d83f R08: 0000000000000001 R09: ffffffff8fcffa0f R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803e420408 R13: 0000000000000001 R14: 0000000000000081 R15: ffff88803e1d4c80 spin_unlock_bh include/linux/spinlock.h:408 [inline] batadv_tt_local_purge_pending_clients+0x38f/0x4d0 net/batman-adv/translation-table.c:3674 batadv_tt_local_resize_to_mtu+0x96/0x130 net/batman-adv/translation-table.c:3958 batadv_update_min_mtu net/batman-adv/hard-interface.c:624 [inline] batadv_hard_if_event+0x67d/0x1640 net/batman-adv/hard-interface.c:957 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1996 call_netdevice_notifiers_mtu net/core/dev.c:2045 [inline] dev_set_mtu_ext+0x39d/0x5b0 net/core/dev.c:8899 dev_set_mtu+0x8e/0x120 net/core/dev.c:8920 dev_ifsioc+0xb61/0x10c0 net/core/dev_ioctl.c:331 dev_ioctl+0x1b9/0xee0 net/core/dev_ioctl.c:587 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 sock_ioctl+0x2f1/0x640 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7b963ad739 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:00007f7b93924188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7b964b1f80 RCX: 00007f7b963ad739 RDX: 0000000020000040 RSI: 0000000000008922 RDI: 0000000000000003 RBP: 00007f7b96407cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b964b1f80 R13: 00007ffef36f80ff R14: 00007f7b93924300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 1d ad 59 bc 7e sbb $0x7ebc59ad,%eax 5: 65 8b 05 a6 59 bc 7e mov %gs:0x7ebc59a6(%rip),%eax # 0x7ebc59b2 c: a9 00 ff ff 00 test $0xffff00,%eax 11: 74 45 je 0x58 13: bf 01 00 00 00 mov $0x1,%edi 18: e8 f5 31 09 00 callq 0x93212 1d: e8 70 d6 35 00 callq 0x35d692 22: fb sti 23: 65 8b 05 88 59 bc 7e mov %gs:0x7ebc5988(%rip),%eax # 0x7ebc59b2 * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 58 je 0x86 2e: 5b pop %rbx 2f: 5d pop %rbp 30: c3 retq 31: 65 8b 05 d6 60 bc 7e mov %gs:0x7ebc60d6(%rip),%eax # 0x7ebc610e 38: 85 c0 test %eax,%eax 3a: 75 a2 jne 0xffffffde 3c: 0f 0b ud2 3e: eb 9e jmp 0xffffffde