watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.0.2331:8938] Modules linked in: CPU: 1 PID: 8938 Comm: syz.0.2331 Not tainted 6.1.90-syzkaller-00032-g42515e9246a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:bpf_ksym_find kernel/bpf/core.c:686 [inline] RIP: 0010:is_bpf_text_address+0x15b/0x190 kernel/bpf/core.c:719 Code: f1 ff 4c 8b 6d d0 8b 05 53 5d 5c 05 44 39 e8 74 14 e8 79 4a f1 ff 49 bc 00 00 00 00 00 fc ff df e9 cf fe ff ff e8 65 4a f1 ff <4d> 85 e4 0f 95 c0 49 81 fc 20 02 00 00 0f 95 c3 20 c3 e8 9e 1f dd RSP: 0018:ffffc900001afbb8 EFLAGS: 00000246 RAX: ffffffff81845dcb RBX: 0000000000000000 RCX: ffff88812c4d0000 RDX: 0000000000000300 RSI: 0000000000000000 RDI: ffffffffa000064c RBP: ffffc900001afbe8 R08: ffffffff81845d08 R09: 0000000000000030 R10: ffffc900001afd50 R11: dffffc0000000001 R12: 0000000000000000 R13: 00000000000026c8 R14: 0000000000000000 R15: ffffffffa000064c FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000001 CR3: 0000000112953000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernel_text_address+0xa9/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_frame.c:19 arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook mm/slub.c:1771 [inline] slab_free mm/slub.c:3684 [inline] __kmem_cache_free+0x218/0x3b0 mm/slub.c:3697 kfree+0x7a/0xf0 mm/slab_common.c:1009 skb_free_head net/core/skbuff.c:762 [inline] skb_release_data+0x616/0x840 net/core/skbuff.c:791 skb_release_all net/core/skbuff.c:856 [inline] __kfree_skb net/core/skbuff.c:870 [inline] kfree_skb_reason+0xd3/0x250 net/core/skbuff.c:893 kfree_skb include/linux/skbuff.h:1239 [inline] ip6_tnl_start_xmit+0xdc8/0x1580 net/ipv6/ip6_tunnel.c:1458 __netdev_start_xmit include/linux/netdevice.h:4908 [inline] netdev_start_xmit include/linux/netdevice.h:4922 [inline] xmit_one net/core/dev.c:3634 [inline] dev_hard_start_xmit+0x1de/0x630 net/core/dev.c:3650 __dev_queue_xmit+0x18a4/0x36e0 net/core/dev.c:4300 dev_queue_xmit include/linux/netdevice.h:3076 [inline] neigh_connected_output+0x449/0x4d0 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:552 [inline] ip6_finish_output2+0x122b/0x1840 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:201 [inline] ip6_finish_output+0x50f/0xa60 net/ipv6/ip6_output.c:212 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x1f7/0x4d0 net/ipv6/ip6_output.c:233 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0x7cf/0xdc0 net/ipv6/ndisc.c:509 ndisc_send_rs+0x47d/0x5f0 net/ipv6/ndisc.c:719 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3984 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1510 expire_timers kernel/time/timer.c:1555 [inline] __run_timers+0x72a/0xa10 kernel/time/timer.c:1826 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1839 __do_softirq+0x1d8/0x661 kernel/softirq.c:617 invoke_softirq kernel/softirq.c:472 [inline] __irq_exit_rcu+0x50/0xf0 kernel/softirq.c:700 irq_exit_rcu+0x9/0x10 kernel/softirq.c:712 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:unwind_next_frame+0x3cb/0x700 arch/x86/kernel/unwind_frame.c:315 Code: 8b 5d d0 48 89 d8 48 c1 e8 03 80 3c 10 00 74 08 48 89 df e8 c7 f7 84 00 48 8b 03 4c 89 f7 48 89 45 d0 48 89 c6 e8 45 03 00 00 <89> c1 b0 01 84 c9 0f 85 ce 01 00 00 49 8d 5e 34 48 89 d8 48 c1 e8 RSP: 0018:ffffc90000797198 EFLAGS: 00000286 RAX: 0000000000797201 RBX: ffffc90000797390 RCX: 1ffff920000f2e4f RDX: 1ffff920000f2e46 RSI: ffffc900007974d0 RDI: ffffc90000797278 RBP: ffffc90000797210 R08: ffffc90000797308 R09: 0000000000000000 R10: ffffc90000797310 R11: dffffc0000000001 R12: 0000000000000000 R13: ffffc90000797270 R14: ffffc90000797220 R15: 1ffff920000f2e44 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 save_stack+0xf6/0x1e0 mm/page_owner.c:147 __reset_page_owner+0x54/0x190 mm/page_owner.c:168 reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1498 [inline] free_pcp_prepare mm/page_alloc.c:1572 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3594 free_the_page mm/page_alloc.c:798 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5803 __vunmap+0x9f3/0xb60 mm/vmalloc.c:2728 __vfree mm/vmalloc.c:2776 [inline] vfree+0x5c/0x80 mm/vmalloc.c:2807 kcov_put kernel/kcov.c:428 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:524 __fput+0x3ab/0x870 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x24d/0x2e0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xbd5/0x2b80 kernel/exit.c:875 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025 get_signal+0x169d/0x1820 kernel/signal.c:2880 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4741179e79 Code: Unable to access opcode bytes at 0x7f4741179e4f. RSP: 002b:00007f4741f55038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000003 RBX: 00007f4741315f80 RCX: 00007f4741179e79 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000240 RBP: 00007f47411e793e R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f4741315f80 R15: 00007ffc2dbd0008 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10760 Comm: kworker/u4:10 Not tainted 6.1.90-syzkaller-00032-g42515e9246a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x60 kernel/kcov.c:225 Code: 0b 00 00 83 fa 02 75 21 48 8b 91 50 0b 00 00 48 8b 32 48 8d 7e 01 8b 89 4c 0b 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 5d 66 90 55 48 89 e5 4c 8b 45 08 65 48 8b 15 20 c5 8c 7e 65 8b 05 RSP: 0018:ffffc90002d1f838 EFLAGS: 00000293 RAX: ffffffff816c0ccc RBX: 1ffff1103ee27885 RCX: ffff888109e29440 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002d1f958 R08: ffffffff816c0c95 R09: ffffed103ee071fb R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000800000000 R14: ffff8881f713c428 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f94c0445000 CR3: 0000000006e0f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1166 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1334 [inline] text_poke_bp_batch+0x1e9/0x730 arch/x86/kernel/alternative.c:1534 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1732 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0x36a/0x380 kernel/jump_label.c:455 jump_label_update+0x3af/0x450 kernel/jump_label.c:801 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177 static_key_enable+0x1a/0x30 kernel/jump_label.c:190 toggle_allocation_gate+0xbf/0x450 mm/kfence/core.c:804 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308