batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) INFO: rcu_preempt self-detected stall on CPU 1-...: (1 GPs behind) idle=756/140000000000001/0 softirq=9399/9401 fqs=5224 (t=10500 jiffies g=1192 c=1191 q=934) NMI backtrace for cpu 1 CPU: 1 PID: 7037 Comm: syz-executor.3 Not tainted 4.14.222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x14b/0x1e7 lib/dump_stack.c:58 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf5/0x120 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x172/0x1bf kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold.59+0x40b/0xd13 kernel/rcu/tree.c:2792 update_process_times+0x2a/0x60 kernel/time/timer.c:1591 tick_sched_handle.isra.5+0x6f/0x140 kernel/time/tick-sched.c:165 tick_sched_timer+0x39/0xf0 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x279/0xad0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1ae/0x600 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline] smp_apic_timer_interrupt+0x11f/0x5d0 arch/x86/kernel/apic/apic.c:1104 apic_timer_interrupt+0x9a/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0x10/0x17 RSP: 0018:ffff8881dace6e58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: ffff8881d2c05358 RCX: 1ffff1103b5a4177 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8881d2c05358 RBP: ffff8881dace6e60 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000050 R11: ffff8881dad20340 R12: ffff8881d2c05360 R13: ffff8881d2c05368 R14: ffff8881ee9f1918 R15: ffff8881e866b240 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:674 [inline] queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline] do_raw_spin_unlock+0x16a/0x250 kernel/locking/spinlock_debug.c:135 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline] _raw_spin_unlock_bh+0x22/0x40 kernel/locking/spinlock.c:208 spin_unlock_bh include/linux/spinlock.h:362 [inline] batadv_tt_local_purge+0x1f1/0x2c0 net/batman-adv/translation-table.c:1444 batadv_tt_local_resize_to_mtu+0x7a/0xe0 net/batman-adv/translation-table.c:4166 batadv_update_min_mtu net/batman-adv/hard-interface.c:619 [inline] batadv_hardif_activate_interface.part.4.cold.12+0xb1/0x2b7 net/batman-adv/hard-interface.c:646 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:799 [inline] batadv_hardif_enable_interface+0xaa8/0xab0 net/batman-adv/hard-interface.c:791 batadv_softif_slave_add+0x7f/0xd0 net/batman-adv/soft-interface.c:889 do_set_master net/core/rtnetlink.c:1961 [inline] do_set_master+0x163/0x1f0 net/core/rtnetlink.c:1936 do_setlink+0x93e/0x2c80 net/core/rtnetlink.c:2098 rtnl_newlink+0xeda/0x1610 net/core/rtnetlink.c:2660 rtnetlink_rcv_msg+0x34c/0x9e0 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2433 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4328 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x639/0xbe0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:656 ___sys_sendmsg+0x625/0x920 net/socket.c:2062 __sys_sendmsg+0xc1/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2103 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x463b49 RSP: 002b:00007f7d11739188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000463b49 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000004ae538 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffe97c6617f R14: 00007f7d11739300 R15: 0000000000022000 net_ratelimit: 6721 callbacks suppressed batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) INFO: rcu_sched detected stalls on CPUs/tasks: batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) 1-...: (1 GPs behind) idle=756/140000000000001/0 softirq=9399/9401 fqs=5224 batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) (detected by 0, t=10556 jiffies, g=314, c=313, q=12) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7037 Comm: syz-executor.3 Not tainted 4.14.222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881dad20340 task.stack: ffff8881dace0000 RIP: 0010:apic_timer_interrupt+0x0/0xa0 RSP: 0018:ffff8881dace6db8 EFLAGS: 00010082 RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 1ffff1103b5a4182 RDX: 0000000000000000 RSI: ffff8881dad20bf0 RDI: 0000000000000282 RBP: ffff8881dace6e30 R08: ffff8881dad20c10 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffffffff0fe2bc0 R13: 1ffffffff0fe2bc2 R14: 0000000000000000 R15: 1ffffffff0fe2bc1 FS: 00007f7d11739700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffd2ec3d50 CR3: 00000001db8a3001 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vprintk_default+0x1a/0x20 kernel/printk/printk.c:1963 vprintk_func+0x49/0x130 kernel/printk/printk_safe.c:401 printk+0x91/0xab kernel/printk/printk.c:1996 batadv_tt_local_resize_to_mtu.cold.23+0x12/0x17 net/batman-adv/translation-table.c:4171 batadv_update_min_mtu net/batman-adv/hard-interface.c:619 [inline] batadv_hardif_activate_interface.part.4.cold.12+0xb1/0x2b7 net/batman-adv/hard-interface.c:646 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:799 [inline] batadv_hardif_enable_interface+0xaa8/0xab0 net/batman-adv/hard-interface.c:791 batadv_softif_slave_add+0x7f/0xd0 net/batman-adv/soft-interface.c:889 do_set_master net/core/rtnetlink.c:1961 [inline] do_set_master+0x163/0x1f0 net/core/rtnetlink.c:1936 do_setlink+0x93e/0x2c80 net/core/rtnetlink.c:2098 rtnl_newlink+0xeda/0x1610 net/core/rtnetlink.c:2660 rtnetlink_rcv_msg+0x34c/0x9e0 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2433 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4328 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x639/0xbe0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:656 ___sys_sendmsg+0x625/0x920 net/socket.c:2062 __sys_sendmsg+0xc1/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2103 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x463b49 RSP: 002b:00007f7d11739188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000463b49 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000004ae538 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffe97c6617f R14: 00007f7d11739300 R15: 0000000000022000 Code: fc e8 cb 1b 80 fa 48 89 e7 e8 4d 59 80 fa e8 a2 1b 80 fa e9 b3 ee ff ff 0f 1f 00 4c 87 c1 e9 88 e9 b4 fa c3 90 90 90 90 90 90 90 <0f> 1f 00 68 10 ff ff ff fc f6 44 24 10 03 74 10 0f 01 f8 0f 1f batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) net_ratelimit: 6266 callbacks suppressed batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224) batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-224)