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 0-...: (10497 ticks this GP) idle=cae/140000000000001/0 softirq=9770/9770 fqs=5249 INFO: rcu_preempt detected stalls on CPUs/tasks: (t=10502 jiffies g=1330 c=1329 q=1736) 0-...: (10497 ticks this GP) idle=cae/140000000000001/0 softirq=9770/9770 fqs=5249 (detected by 1, t=10502 jiffies, g=1330, c=1329, q=1736) NMI backtrace for cpu 0 CPU: 0 PID: 7861 Comm: syz-executor.0 Not tainted 4.14.202-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/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 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:ffff88808ea86e90 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: 0000000000000201 RCX: 1ffff11013ecbd8a RDX: 1ffffffff0fe2bab RSI: ffff88809f65ec30 RDI: ffffffff87f15d58 RBP: ffff88808ea86ea0 R08: ffff88809f65ec50 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8652fd3a R13: 0000000000000000 R14: ffff88809094d108 R15: ffff8880b4c34800 __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_pending_clients+0x22a/0x320 net/batman-adv/translation-table.c:3901 batadv_tt_local_resize_to_mtu+0x82/0xe0 net/batman-adv/translation-table.c:4167 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:00007f2254d67c78 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: 00007ffd72455a8f R14: 00007f2254d689c0 R15: 000000000078bf0c Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7861 Comm: syz-executor.0 Not tainted 4.14.202-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809f65e380 task.stack: ffff88808ea80000 RIP: 0010:__lock_acquire+0x269/0x42d0 kernel/locking/lockdep.c:3396 RSP: 0018:ffff88808ea86c50 EFLAGS: 00000006 RAX: ffffffff89604f40 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1101262174e RSI: 0000000000000000 RDI: ffff88809310ba70 RBP: ffff88808ea86e18 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88809f65e380 R12: ffff88809310ba68 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f2254d68700(0000) GS:ffff8880ba800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1a4be95000 CR3: 00000000a16d7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x17e/0x3e0 kernel/locking/lockdep.c:3998 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:176 spin_lock_bh include/linux/spinlock.h:322 [inline] batadv_tt_local_purge+0xe7/0x2c0 net/batman-adv/translation-table.c:1442 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:00007f2254d67c78 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: 00007ffd72455a8f R14: 00007f2254d689c0 R15: 000000000078bf0c Code: 49 8d 7c dc 08 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c7 2e 00 00 49 8b 44 dc 08 48 85 c0 0f 84 03 ff ff ff f0 ff 80 38 01 00 00 <49> 8d 9b 80 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 de 48 INFO: rcu_sched detected stalls on CPUs/tasks: 0-...: (10550 ticks this GP) idle=cae/140000000000000/0 softirq=9770/9770 fqs=5249 (detected by 1, t=10502 jiffies, g=518, c=517, q=12) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7861 Comm: syz-executor.0 Not tainted 4.14.202-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809f65e380 task.stack: ffff88808ea80000 RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] RIP: 0010:do_raw_spin_lock+0xca/0x230 kernel/locking/spinlock_debug.c:113 RSP: 0018:ffff88808ea86e70 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888093106ea0 RCX: ffff88809f65ec08 RDX: 0000000000000001 RSI: ffff88809f65ec58 RDI: ffff888093106ea4 RBP: ffff88808ea86e98 R08: 000000000000475b R09: ffffffff895542d8 R10: 0000000000000050 R11: ffff88809f65e380 R12: ffff888093106ea8 R13: ffff888093106eb0 R14: ffff88809094d188 R15: ffff8880b4c34800 FS: 00007f2254d68700(0000) GS:ffff8880ba800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1a4be95000 CR3: 00000000a16d7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x39/0x40 kernel/locking/spinlock.c:176 spin_lock_bh include/linux/spinlock.h:322 [inline] batadv_tt_local_purge_pending_clients+0xe9/0x320 net/batman-adv/translation-table.c:3882 batadv_tt_local_resize_to_mtu+0x82/0xe0 net/batman-adv/translation-table.c:4167 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:00007f2254d67c78 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: 00007ffd72455a8f R14: 00007f2254d689c0 R15: 000000000078bf0c Code: 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c 01 00 00 8b 53 08 65 8b 05 e5 9f b9 7e 39 c2 74 7e 31 c0 ba 01 00 00 00 f0 0f b1 13 <85> c0 0f 85 8c 00 00 00 65 44 8b 35 c6 9f b9 7e 48 b8 00 00 00 net_ratelimit: 7297 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) net_ratelimit: 7040 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)