watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.5:9623] Modules linked in: irq event stamp: 4819073 hardirqs last enabled at (4819072): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4819073): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (22324): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (23771): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (23771): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9623 Comm: syz-executor.5 Not tainted 4.14.294-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 task: ffff88804bbe66c0 task.stack: ffff88804a2e8000 RIP: 0010:in_task_stack+0x31/0x40 arch/x86/kernel/dumpstack.c:38 RSP: 0018:ffff8880ba4071b8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff88804a2e8000 RBX: ffff8880ba407290 RCX: ffff88804a2f0000 RDX: ffff8880ba407290 RSI: ffff88804bbe66c0 RDI: ffff8880ba4071e8 RBP: ffff8880ba4071e8 R08: 0000000000000001 R09: ffff8880ba4072b8 R10: ffff8880ba4072e7 R11: 0000000000000000 R12: ffff88804bbe66c0 R13: ffff8880ba4072b0 R14: dffffc0000000000 R15: ffff8880ba407290 FS: 00007f5f78cca700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2cf5348fc8 CR3: 000000009d1c1000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_stack_info+0x32/0x150 arch/x86/kernel/dumpstack_64.c:115 __unwind_start+0x521/0x930 arch/x86/kernel/unwind_orc.c:552 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x63/0x160 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550 kmem_cache_zalloc include/linux/slab.h:651 [inline] fill_pool lib/debugobjects.c:110 [inline] __debug_object_init+0x578/0x7a0 lib/debugobjects.c:341 debug_object_init lib/debugobjects.c:393 [inline] debug_object_activate+0x391/0x490 lib/debugobjects.c:474 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.0+0x31/0x7d0 kernel/rcu/tree.c:3050 neigh_destroy+0x352/0x470 net/core/neighbour.c:777 neigh_release include/net/neighbour.h:416 [inline] neigh_cleanup_and_release+0x9e/0xc0 net/core/neighbour.c:108 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:330 [inline] __neigh_create+0xc71/0x19c0 net/core/neighbour.c:514 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3773 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3614 RSP: 0018:ffff88804a2ef120 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e135b RBX: dffffc0000000000 RCX: 1ffff1100977cdf2 RDX: 0000000000000000 RSI: ffff88804bbe6f70 RDI: ffff88804bbe6f44 RBP: ffffed100977ccd8 R08: ffff88823fff7018 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804bbe66c0 R13: ffffffff88f09ad8 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:30 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:210 [inline] RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] RIP: 0010:check_memory_region+0x35/0x170 mm/kasan/kasan.c:267 RSP: 0018:ffff88804a2ef1f0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff87006c0a RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff88809ea08bf4 RBP: ffff88809ea08bf4 R08: 0000000000000001 R09: ffff88809ea08bf4 R10: ffff88809ea08bf4 R11: ffff88804bbe66c0 R12: 0000000000000001 R13: ffffffff87cbc7ea R14: ffff88804a2ef320 R15: 0000000000000e0c memcpy+0x35/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:376 [inline] vsnprintf+0x76a/0x1340 lib/vsprintf.c:2169 seq_vprintf fs/seq_file.c:403 [inline] seq_printf+0x172/0x260 fs/seq_file.c:418 diskstats_show+0xa85/0xf00 block/genhd.c:1287 seq_read+0xaee/0x1180 fs/seq_file.c:275 proc_reg_read+0xee/0x1a0 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x418/0x910 fs/splice.c:416 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x1e5/0x700 fs/splice.c:950 do_splice_direct+0x164/0x210 fs/splice.c:1059 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f5f7a356669 RSP: 002b:00007f5f78cca168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f5f7a477f80 RCX: 00007f5f7a356669 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007f5f7a3b1560 R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2e9262bf R14: 00007f5f78cca300 R15: 0000000000022000 Code: 88 00 80 00 00 48 39 f8 77 21 48 39 f9 76 1c 48 89 42 08 b8 01 00 00 00 c7 02 01 00 00 00 48 89 4a 10 48 c7 42 18 00 00 00 00 c3 <31> c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 fd 53 48 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9629 Comm: syz-executor.1 Not tainted 4.14.294-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 task: ffff88804a348180 task.stack: ffff88804a350000 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff8880ba507610 EFLAGS: 00000082 RAX: ffff88804a348180 RBX: ffff88804a38f5d8 RCX: 1ffff1100946915f RDX: 1ffff11009471ebb RSI: 000000000000001d RDI: ffff88804a38f5d8 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88804a348180 R12: ffff88804a38f200 R13: ffff88804a38f5e4 R14: 000000000000001d R15: 0000000000000001 FS: 00007f24f7d16700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000201f12bf CR3: 00000000a0962000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:627 [inline] kill_fasync fs/fcntl.c:1010 [inline] kill_fasync+0x42/0x3c0 fs/fcntl.c:1004 perf_event_wakeup kernel/events/core.c:5578 [inline] perf_pending_event+0x1d7/0x260 kernel/events/core.c:5602 irq_work_run_list+0xf0/0x160 kernel/irq_work.c:156 irq_work_run+0x4e/0xc0 kernel/irq_work.c:171 smp_irq_work_interrupt+0xa3/0x4e0 arch/x86/kernel/irq_work.c:21 irq_work_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:824 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:queued_write_lock_slowpath+0x80/0x1d0 kernel/locking/qrwlock.c:130 RSP: 0018:ffff8880ba5077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff09 RAX: 00000000000000ff RBX: ffffffff89d93bb0 RCX: 000000000000332c RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89d93bb0 RBP: ffffffff89d93bb4 R08: ffffffff8b9bb460 R09: 00000000000421a5 R10: ffff88804a348ad0 R11: ffff88804a348180 R12: fffffbfff13b2776 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880a0a69080 queued_write_lock include/asm-generic/qrwlock.h:134 [inline] do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203 neigh_forced_gc net/core/neighbour.c:176 [inline] neigh_alloc net/core/neighbour.c:330 [inline] __neigh_create+0xb48/0x19c0 net/core/neighbour.c:514 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3773 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__sanitizer_cov_trace_pc+0x3d/0x50 kernel/kcov.c:87 RSP: 0018:ffff88804a357220 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc900070ca000 RDX: 000000000002e9da RSI: ffffffff87006697 RDI: ffff88809ef3cdc1 RBP: ffffffff87cbc7e4 R08: 0000000000000001 R09: ffffed1013de79b8 R10: ffff88809ef3cdc0 R11: ffff88804a348180 R12: ffff88809ef3cdc1 R13: ffffffff87cbc7e4 R14: ffff88804a357320 R15: 0000000000000025 vsnprintf+0x1f7/0x1340 lib/vsprintf.c:2157 seq_vprintf fs/seq_file.c:403 [inline] seq_printf+0x172/0x260 fs/seq_file.c:418 diskstats_show+0xa85/0xf00 block/genhd.c:1287 seq_read+0xaee/0x1180 fs/seq_file.c:275 proc_reg_read+0xee/0x1a0 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x418/0x910 fs/splice.c:416 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x1e5/0x700 fs/splice.c:950 do_splice_direct+0x164/0x210 fs/splice.c:1059 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f24f93a2669 RSP: 002b:00007f24f7d16168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f24f94c3f80 RCX: 00007f24f93a2669 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007f24f93fd560 R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2ea4b4df R14: 00007f24f7d16300 R15: 0000000000022000 Code: 00 e9 9f fe ff ff 4c 89 e7 e8 34 ba 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 <48> 85 c0 74 1a 65 8b 15 7b 37 ad 7e 81 e2 00 01 1f 00 75 0b 8b