batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_1 INFO: rcu_preempt self-detected stall on CPU INFO: rcu_sched detected stalls on CPUs/tasks: 0-...: (1 GPs behind) idle=452/140000000000002/0 softirq=15214/15219 fqs=14 0-...: (10503 ticks this GP) idle=452/140000000000002/0 softirq=15219/15219 fqs=0 (t=10500 jiffies g=1650 c=1649 q=1117) rcu_preempt kthread starved for 10468 jiffies! g1650 c1649 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 rcu_preempt R running task 29984 8 2 0x80000000 Call Trace: (detected by 1, t=10503 jiffies, g=548, c=547, q=39) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7651 Comm: syz-executor884 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a8d44500 task.stack: ffff888082ed0000 RIP: 0010:arch_local_irq_disable arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:797 [inline] RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] RIP: 0010:_raw_spin_lock_irqsave+0x46/0xbf kernel/locking/spinlock.c:160 RSP: 0018:ffff8880aea06bf0 EFLAGS: 00000082 RAX: ffffffff87d16690 RBX: 1ffff11015d40d86 RCX: 1ffffffff14b0f60 RDX: dffffc0000000000 RSI: ffffffff8a546660 RDI: ffffffff8af84c20 RBP: ffffffff8af84c20 R08: 0000000000007770 R09: ffffffff8a097400 R10: ffff8880a8d44ee8 R11: ffff8880a8d44500 R12: 0000000000000082 R13: 0000000000000044 R14: ffffffff8af84e40 R15: dffffc0000000000 FS: 0000000001fe7940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006d7090 CR3: 000000008aef3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial8250_console_write+0x6c1/0x8e0 drivers/tty/serial/8250/8250_port.c:3236 call_console_drivers kernel/printk/printk.c:1725 [inline] console_unlock+0x9b2/0xec0 kernel/printk/printk.c:2397 vprintk_emit kernel/printk/printk.c:1923 [inline] vprintk_emit+0x1f8/0x600 kernel/printk/printk.c:1888 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 printk_stack_address arch/x86/kernel/dumpstack.c:70 [inline] show_trace_log_lvl+0x209/0x281 arch/x86/kernel/dumpstack.c:202 sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 rcu_check_gp_kthread_starvation+0x28d/0x2d4 kernel/rcu/tree.c:1374 print_cpu_stall kernel/rcu/tree.c:1540 [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+0x488/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:unwind_next_frame+0xa2d/0x17a0 arch/x86/kernel/unwind_orc.c:431 RSP: 0018:ffff8880aea07350 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8880aea07400 RCX: 1ffff11015d40e82 RDX: 1ffff11015d40e87 RSI: ffff8880aea07308 RDI: ffff888082ed7e70 RBP: 1ffff11015d40e71 R08: 0000000000000001 R09: ffff888082ed7e38 R10: ffff8880aea07435 R11: 0000000000058071 R12: ffffffff88f29c04 R13: ffff8880aea07438 R14: ffff888082ed7e78 R15: 0000000000000001 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 kmem_cache_alloc_node+0x148/0x7a0 mm/slab.c:3642 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] __neigh_notify+0x84/0x150 net/core/neighbour.c:2926 neigh_cleanup_and_release+0x71/0xc0 net/core/neighbour.c:106 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xc51/0x1980 net/core/neighbour.c:499 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff888082ed7650 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a8d44500 RBX: ffff88808e2fcdc8 RCX: 1ffffffff10279a4 RDX: 0000000000000000 RSI: ffffffff87d84360 RDI: ffff8880a8d44d7c RBP: ffff88809a6f0180 R08: 0000000000000000 R09: 0000000000020012 R10: ffff8880a8d44df8 R11: ffff8880a8d44500 R12: 0000000000000000 R13: 0000000000000080 R14: ffff88809afa8140 R15: ffff88809a482dc0 rcu_read_unlock include/linux/rcupdate.h:681 [inline] ext4_get_group_info fs/ext4/ext4.h:2840 [inline] ext4_validate_block_bitmap+0x4b6/0xf00 fs/ext4/balloc.c:381 ext4_read_block_bitmap_nowait+0x250/0x1be0 fs/ext4/balloc.c:508 ext4_read_block_bitmap+0x1b/0x60 fs/ext4/balloc.c:546 ext4_mb_mark_diskspace_used+0x159/0xf80 fs/ext4/mballoc.c:2990 ext4_mb_new_blocks+0xa2e/0x35f0 fs/ext4/mballoc.c:4609 ext4_ext_map_blocks+0x24cd/0x4b80 fs/ext4/extents.c:4492 ext4_map_blocks+0x7ea/0x1610 fs/ext4/inode.c:644 ext4_getblk+0x98/0x3f0 fs/ext4/inode.c:980 ext4_bread+0x6c/0x1a0 fs/ext4/inode.c:1030 ext4_append+0x143/0x350 fs/ext4/namei.c:65 ext4_init_new_dir fs/ext4/namei.c:2628 [inline] ext4_mkdir+0x4c9/0xb60 fs/ext4/namei.c:2675 vfs_mkdir+0x3af/0x620 fs/namei.c:3849 SYSC_mkdirat fs/namei.c:3872 [inline] SyS_mkdirat fs/namei.c:3856 [inline] SYSC_mkdir fs/namei.c:3883 [inline] SyS_mkdir+0x1bc/0x210 fs/namei.c:3881 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445489 RSP: 002b:00007fff1ffc9258 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445489 RDX: 0000000000445489 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000004061e0 R14: 0000000000000000 R15: 0000000000000000 Code: 80 3c 10 00 75 7f 48 83 3d 27 bb 90 01 00 74 71 9c 58 0f 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 49 89 c4 48 c7 c0 90 66 d1 87 <48> c1 e8 03 80 3c 10 00 75 61 48 83 3d 08 bb 90 01 00 74 44 fa rcu_sched kthread starved for 10503 jiffies! g548 c547 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 rcu_sched R schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 running task 29984 9 2 0x80000000 Call Trace: rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 0 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 CPU: 0 PID: 7651 Comm: syz-executor884 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: kthread+0x30d/0x420 kernel/kthread.c:232 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x16d/0x1b8 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+0x490/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:unwind_next_frame+0xa2d/0x17a0 arch/x86/kernel/unwind_orc.c:431 RSP: 0018:ffff8880aea07350 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8880aea07400 RCX: 1ffff11015d40e82 RDX: 1ffff11015d40e87 RSI: ffff8880aea07308 RDI: ffff888082ed7e70 RBP: 1ffff11015d40e71 R08: 0000000000000001 R09: ffff888082ed7e38 R10: ffff8880aea07435 R11: 0000000000058071 R12: ffffffff88f29c04 R13: ffff8880aea07438 R14: ffff888082ed7e78 R15: 0000000000000001 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 kmem_cache_alloc_node+0x148/0x7a0 mm/slab.c:3642 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] __neigh_notify+0x84/0x150 net/core/neighbour.c:2926 neigh_cleanup_and_release+0x71/0xc0 net/core/neighbour.c:106 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xc51/0x1980 net/core/neighbour.c:499 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff888082ed7650 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a8d44500 RBX: ffff88808e2fcdc8 RCX: 1ffffffff10279a4 RDX: 0000000000000000 RSI: ffffffff87d84360 RDI: ffff8880a8d44d7c RBP: ffff88809a6f0180 R08: 0000000000000000 R09: 0000000000020012 R10: ffff8880a8d44df8 R11: ffff8880a8d44500 R12: 0000000000000000 R13: 0000000000000080 R14: ffff88809afa8140 R15: ffff88809a482dc0 rcu_read_unlock include/linux/rcupdate.h:681 [inline] ext4_get_group_info fs/ext4/ext4.h:2840 [inline] ext4_validate_block_bitmap+0x4b6/0xf00 fs/ext4/balloc.c:381 ext4_read_block_bitmap_nowait+0x250/0x1be0 fs/ext4/balloc.c:508 ext4_read_block_bitmap+0x1b/0x60 fs/ext4/balloc.c:546 ext4_mb_mark_diskspace_used+0x159/0xf80 fs/ext4/mballoc.c:2990 ext4_mb_new_blocks+0xa2e/0x35f0 fs/ext4/mballoc.c:4609 ext4_ext_map_blocks+0x24cd/0x4b80 fs/ext4/extents.c:4492 ext4_map_blocks+0x7ea/0x1610 fs/ext4/inode.c:644 ext4_getblk+0x98/0x3f0 fs/ext4/inode.c:980 ext4_bread+0x6c/0x1a0 fs/ext4/inode.c:1030 ext4_append+0x143/0x350 fs/ext4/namei.c:65 ext4_init_new_dir fs/ext4/namei.c:2628 [inline] ext4_mkdir+0x4c9/0xb60 fs/ext4/namei.c:2675 vfs_mkdir+0x3af/0x620 fs/namei.c:3849 SYSC_mkdirat fs/namei.c:3872 [inline] SyS_mkdirat fs/namei.c:3856 [inline] SYSC_mkdir fs/namei.c:3883 [inline] SyS_mkdir+0x1bc/0x210 fs/namei.c:3881 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445489 RSP: 002b:00007fff1ffc9258 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445489 RDX: 0000000000445489 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000004061e0 R14: 0000000000000000 R15: 0000000000000000 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.427 msecs IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_1