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=f6e/140000000000001/0 softirq=11195/11197 fqs=5241 
	 (t=10500 jiffies g=1295 c=1294 q=1510)
NMI backtrace for cpu 1
CPU: 1 PID: 7779 Comm: syz-executor.2 Not tainted 4.14.194-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14b/0x1f1 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0xf5/0x119 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+0x415/0xcf2 kernel/rcu/tree.c:2792
 update_process_times+0x28/0x90 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:1075 [inline]
 smp_apic_timer_interrupt+0x11f/0x5d0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x9a/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline]
RIP: 0010:__local_bh_enable_ip+0xfb/0x150 kernel/softirq.c:192
RSP: 0018:ffff8880826dee88 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: 0000000000000201 RCX: 1ffff11014a135d2
RDX: 1ffffffff0fe2d2b RSI: ffff8880a509ae70 RDI: ffffffff87f16958
RBP: ffff8880826dee98 R08: ffff8880a509ae90 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8651aa91
R13: ffff888094166da0 R14: ffff8880a8212b98 R15: ffff8880a8299480
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x30/0x40 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+0x163/0x1f0 net/core/rtnetlink.c:1961
 do_setlink+0x93e/0x2c80 net/core/rtnetlink.c:2098
 rtnl_newlink+0xe5a/0x13a0 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+0x657/0xc60 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: 0033:0x45c1f9
RSP: 002b:00007ff9657eac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002b580 RCX: 000000000045c1f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe211c85ff R14: 00007ff9657eb9c0 R15: 000000000078bf0c
net_ratelimit: 6764 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=f6e/140000000000001/0 softirq=11193/11197 fqs=5240 
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)
(detected by 0, t=10554 jiffies, g=491, c=490, q=9)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7779 Comm: syz-executor.2 Not tainted 4.14.194-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a509a5c0 task.stack: ffff8880826d8000
RIP: 0010:find_held_lock+0x22c/0x300 kernel/locking/lockdep.c:3624
RSP: 0018:ffff8880aed07bf8 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: ffff8880a509aec0 RCX: ffff8880aed07c78
RDX: 0000000000000004 RSI: ffff8880aed07c78 RDI: ffff8880a509aed0
RBP: ffff8880aed07c30 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000078 R11: ffff8880a509a5c0 R12: ffffffff89b523e0
R13: 0000000000000003 R14: 0000000000000004 R15: ffffffff89b523e0
FS:  00007ff9657eb700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff0d0b7c1c CR3: 00000000a54ed000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __lock_release kernel/locking/lockdep.c:3767 [inline]
 lock_release+0x251/0x820 kernel/locking/lockdep.c:4017
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_unlock_irqrestore+0x1f/0xd0 kernel/locking/spinlock.c:192
 debug_object_activate+0x31b/0x4b0 lib/debugobjects.c:460
 debug_hrtimer_activate kernel/time/hrtimer.c:401 [inline]
 debug_activate kernel/time/hrtimer.c:447 [inline]
 enqueue_hrtimer+0x1f/0x330 kernel/time/hrtimer.c:844
 __run_hrtimer kernel/time/hrtimer.c:1238 [inline]
 __hrtimer_run_queues+0x77a/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:1075 [inline]
 smp_apic_timer_interrupt+0x11f/0x5d0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x9a/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1685 [inline]
RIP: 0010:vprintk_emit+0x42c/0x4e0 kernel/printk/printk.c:1922
RSP: 0018:ffff8880826dedf0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 1ffff11014a135d2
RDX: 0000000000000000 RSI: ffff8880a509ae70 RDI: 0000000000000286
RBP: ffff8880826dee40 R08: ffff8880a509ae90 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffffffff0fe2d28
R13: 1ffffffff0fe2d2a R14: 0000000000000000 R15: 1ffffffff0fe2d29
 vprintk_default+0x1a/0x20 kernel/printk/printk.c:1963
 vprintk_func+0x49/0x12c kernel/printk/printk_safe.c:401
 printk+0x91/0xab kernel/printk/printk.c:1996
 batadv_tt_local_resize_to_mtu.cold.23+0x12/0x25 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+0x163/0x1f0 net/core/rtnetlink.c:1961
 do_setlink+0x93e/0x2c80 net/core/rtnetlink.c:2098
 rtnl_newlink+0xe5a/0x13a0 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+0x657/0xc60 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: 0033:0x45c1f9
RSP: 002b:00007ff9657eac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002b580 RCX: 000000000045c1f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe211c85ff R14: 00007ff9657eb9c0 R15: 000000000078bf0c
Code: 00 4c 3b 7b 10 74 0b 49 89 dc e9 31 ff ff ff 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 8b 75 d0 48 89 f2 48 c1 ea 03 0f b6 14 02 <48> 89 f0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 32 48 8b 45 d0 
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)
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
net_ratelimit: 6123 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)