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watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u8:8:731] Modules linked in: irq event stamp: 31961905 hardirqs last enabled at (31961904): [<ffff8000841062ac>] get_random_u16+0x318/0x618 drivers/char/random.c:552 hardirqs last disabled at (31961905): [<ffff80008b69c92c>] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (31961905): [<ffff80008b69c92c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (1526360): [<ffff8000898025b0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1526443): [<ffff800080020db4>] __do_softirq+0x14/0x20 kernel/softirq.c:595 CPU: 1 UID: 0 PID: 731 Comm: kworker/u8:8 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bat_events batadv_nc_worker pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : get_random_u16+0x33c/0x618 lr : get_random_u16+0x338/0x618 drivers/char/random.c:552 sp : ffff800080016be0 x29: ffff800080016d20 x28: 0000000000000003 x27: dfff800000000000 x26: ffff700010002d80 x25: 1ffff00010002d9c x24: 000000000000d089 x23: 0000000000000003 x22: ffff80008f8fcd60 x21: ffff80008f9a1170 x20: 00000000000000c0 x19: 0000000000000000 x18: dfff800000000000 x17: 0000000061e27882 x16: ffff800080463930 x15: 0000000000000008 x14: 1ffff00011f340ca x13: ffff800080018000 x12: 0000000000000003 x11: 0000000000000502 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c78e0000 x7 : ffff800084105c64 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000002 x1 : 0000000000000080 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) get_random_u16+0x33c/0x618 drivers/char/random.c:552 (P) cake_dequeue+0x2184/0x3ad0 net/sched/sch_cake.c:2086 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x1e0/0x2378 net/sched/sch_generic.c:416 __dev_xmit_skb net/core/dev.c:3896 [inline] __dev_queue_xmit+0xd58/0x35b4 net/core/dev.c:4400 dev_queue_xmit include/linux/netdevice.h:3168 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip6_finish_output2+0x1688/0x214c net/ipv6/ip6_output.c:141 ip6_finish_output+0x428/0x7c4 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x274/0x598 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] ip6_local_out+0x120/0x160 net/ipv6/output_core.c:155 ip6_send_skb+0x1a8/0x584 net/ipv6/ip6_output.c:1976 ip6_push_pending_frames+0xd0/0x118 net/ipv6/ip6_output.c:1997 icmpv6_push_pending_frames+0x288/0x3f4 net/ipv6/icmp.c:311 icmp6_send+0x1150/0x1a9c net/ipv6/icmp.c:630 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_link_failure+0x44/0x4a8 net/ipv6/route.c:2799 dst_link_failure include/net/dst.h:429 [inline] ndisc_error_report+0x11c/0x170 net/ipv6/ndisc.c:731 neigh_invalidate+0x2c0/0x518 net/core/neighbour.c:1010 neigh_timer_handler+0x630/0xe08 net/core/neighbour.c:1097 call_timer_fn+0x1b4/0x8b8 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [inline] __run_timer_base+0x56c/0x7b4 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2449 handle_softirqs+0x320/0xd34 kernel/softirq.c:561 __do_softirq+0x14/0x20 kernel/softirq.c:595 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:442 [inline] __irq_exit_rcu+0x1d8/0x544 kernel/softirq.c:662 irq_exit_rcu+0x14/0x84 kernel/softirq.c:678 __el1_irq arch/arm64/kernel/entry-common.c:561 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:575 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 rcu_is_watching+0x0/0x18c (P) process_one_work+0x7a8/0x15cc kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3391 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6023 Comm: klogd Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __sanitizer_cov_trace_pc+0x0/0x84 kernel/kcov.c:210 lr : sock_def_readable+0x28/0x5fc net/core/sock.c:3445 sp : ffff8000a3ee78e0 x29: ffff8000a3ee78e0 x28: ffff7000147dcf44 x27: ffff0000d875afc8 x26: 1fffe0001b0eb534 x25: ffff0000ce93a3c0 x24: dfff800000000000 x23: dfff800000000000 x22: 000000000000004b x21: ffff0000d875a9a0 x20: ffff0000d875a940 x19: ffff0000d875a940 x18: ffff8000a3ee7860 x17: 0000000000000000 x16: ffff80008069d39c x15: 0000000000000001 x14: 1fffe0001b0eb5fc x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000000000 x9 : 1fffe0001b2bf791 x8 : ffff800089783658 x7 : ffff8000897a6580 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008047d328 x2 : 0000000000000001 x1 : 0000000000000001 x0 : ffff0000d875a940 Call trace: __sanitizer_cov_trace_pc+0x0/0x84 kernel/audit_tree.c:174 (P) unix_dgram_sendmsg+0xfe4/0x1888 net/unix/af_unix.c:2167 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] __sys_sendto+0x360/0x4d8 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2200 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024/12/24 05:19 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 573067a5a685 | 444551c4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | BUG: soft lockup in neigh_timer_handler | ||
| 2025/01/23 06:11 | upstream | 7004a2e46d16 | 9d4f14f8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: rcu detected stall in neigh_timer_handler |