batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=196/1/0x4000000000000002 softirq=233229/233238 fqs=5064 rcu: (t=10500 jiffies g=287445 q=1820) NMI backtrace for cpu 0 CPU: 0 PID: 29306 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1650 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff88805043ebd0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff8880526bc300 RCX: 0000000000007acc RDX: dffffc0000000000 RSI: 000000000b075fde RDI: 0000000000000286 RBP: ffff88804bd6c520 R08: ffffffff8cd54ba0 R09: 0000000000000002 R10: ffff8880526bcbd8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] batadv_tt_local_purge_pending_clients+0x112/0x3a0 net/batman-adv/translation-table.c:3905 batadv_tt_local_resize_to_mtu+0x96/0x130 net/batman-adv/translation-table.c:4208 batadv_hardif_activate_interface.part.0.cold+0x1bd/0x226 net/batman-adv/hard-interface.c:664 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:825 [inline] batadv_hardif_enable_interface+0xadf/0xba0 net/batman-adv/hard-interface.c:817 batadv_softif_slave_add+0x8a/0x100 net/batman-adv/soft-interface.c:898 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321 do_setlink+0x7ec/0x3540 net/core/rtnetlink.c:2455 rtnl_newlink+0xda9/0x15c0 net/core/rtnetlink.c:3077 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fda792ed059 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fda77c62168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fda793fff60 RCX: 00007fda792ed059 RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000003 RBP: 00007fda7934708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd78d4520f R14: 00007fda77c62300 R15: 0000000000022000 net_ratelimit: 3375 callbacks suppressed batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) net_ratelimit: 3492 callbacks suppressed batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) batman_adv: batadv4: Forced to purge local tt entries to fit new maximum fragment MTU (-80) ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 48 c1 add %cl,-0x3f(%rax) 9: e8 03 80 3c 10 callq 0x103c8011 e: 00 0f add %cl,(%rdi) 10: 85 b7 01 00 00 48 test %esi,0x48000001(%rdi) 16: 83 3d 09 2e a6 08 00 cmpl $0x0,0x8a62e09(%rip) # 0x8a62e26 1d: 0f 84 2a 01 00 00 je 0x14d 23: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 83 c4 18 add $0x18,%rsp 33: 5b pop %rbx 34: 5d pop %rbp 35: 41 5c pop %r12 37: 41 5d pop %r13 39: 41 5e pop %r14 3b: 41 5f pop %r15 3d: c3 retq 3e: 65 gs 3f: 8b .byte 0x8b