watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:9555] Modules linked in: irq event stamp: 3956961 hardirqs last enabled at (3956960): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (3956961): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (49722): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (50401): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (50401): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9555 Comm: syz-executor.3 Not tainted 4.14.288-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 task: ffff8880a0078540 task.stack: ffff8880715f8000 RIP: 0010:unwind_done arch/x86/include/asm/unwind.h:46 [inline] RIP: 0010:unwind_get_return_address+0xa/0x90 arch/x86/kernel/unwind_orc.c:249 RSP: 0018:ffff8880ba407740 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffffffff8191e3f4 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff8880ba407648 RDI: ffff8880ba407758 RBP: ffff8880ba4077c8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880715ffd98 R11: 0000000000000001 R12: ffff8880ba4077e0 R13: 0000000000000000 R14: ffff88813fe744c0 R15: 0000000000000044 FS: 00007f55c9447700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32122000 CR3: 000000009fcfc000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0xa0/0x160 arch/x86/kernel/stacktrace.c:45 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 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] dst_cow_metrics_generic+0x48/0x130 net/core/dst.c:210 ipv6_cow_metrics+0x70/0x180 net/ipv6/route.c:196 dst_metrics_write_ptr include/net/dst.h:146 [inline] dst_metric_set include/net/dst.h:207 [inline] icmp6_dst_alloc+0x3f6/0x580 net/ipv6/route.c:1782 ndisc_send_skb+0xace/0x1390 net/ipv6/ndisc.c:463 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+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff8880715ff350 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a0078540 RBX: ffff8880a0078540 RCX: ffffc900064cc000 RDX: 0000000000040000 RSI: ffffffff8136e9b2 RDI: ffff8880a0078a90 RBP: ffff8880af86e998 R08: 0000000000000000 R09: 0000000000020011 R10: ffff8880a0078e18 R11: ffff8880a0078540 R12: 0000000000000004 R13: 0000000000000550 R14: ffff8880a0078540 R15: ffff8880a0d5e378 __task_pid_nr_ns+0xce/0x440 kernel/pid.c:533 perf_event_pid_type kernel/events/core.c:1293 [inline] perf_event_pid kernel/events/core.c:1302 [inline] __perf_event_header__init_id+0x364/0x5a0 kernel/events/core.c:5779 perf_event_header__init_id kernel/events/core.c:5803 [inline] perf_event_comm_output+0x5a4/0x700 kernel/events/core.c:6718 perf_iterate_ctx+0x117/0x610 kernel/events/core.c:6376 perf_iterate_sb+0x62f/0x8a0 kernel/events/core.c:6433 perf_event_comm_event kernel/events/core.c:6753 [inline] perf_event_comm+0x197/0x1f0 kernel/events/core.c:6780 set_task_comm include/linux/sched.h:1559 [inline] comm_write+0x1b1/0x1f0 fs/proc/base.c:1560 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 audit: type=1800 audit(1658324874.710:6): pid=9583 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13915 res=0 do_splice_direct+0x164/0x210 fs/splice.c:1061 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: 0033:0x7f55caad21f9 RSP: 002b:00007f55c9447168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f55cabe4f60 RCX: 00007f55caad21f9 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007f55cab2c161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000800000000035 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff4248cfdf R14: 00007f55c9447300 R15: 0000000000022000 Code: 34 24 e8 4a 92 5b 00 48 8b 34 24 e9 44 ff ff ff e8 dc 90 5b 00 eb b7 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 55 48 c1 ea 03 53 48 89 fb 0f b6 04 02 84 c0 74 04 3c Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9593 Comm: syz-executor.0 Not tainted 4.14.288-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 task: ffff88807158a100 task.stack: ffff888070050000 RIP: 0010:validate_chain kernel/locking/lockdep.c:2471 [inline] RIP: 0010:__lock_acquire+0x82c/0x3f20 kernel/locking/lockdep.c:3491 RSP: 0018:ffff8880ba507ce0 EFLAGS: 00000046 RAX: 1ffffffff16733ab RBX: ffffffff8b399d40 RCX: 000000000000370d RDX: 1ffffffff173786d RSI: 00000000b106abb5 RDI: ffffffff8b399d58 RBP: dffffc0000000000 R08: ffffffff8b9bc368 R09: 00000000000c4053 R10: ffff88807158a9d8 R11: ffff88807158a100 R12: ffff88807158a9f0 R13: 0000000000000001 R14: 5f4d3cc1c84897af R15: ffffffff8beccd80 FS: 00007f3898862700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb935d07028 CR3: 00000000a1421000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 hrtimer_interrupt+0x100/0x5e0 kernel/time/hrtimer.c:1308 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline] RIP: 0010:lock_release+0xc2/0x870 kernel/locking/lockdep.c:4013 RSP: 0018:ffff888070057748 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000286 RBX: 1ffff1100e00aeec RCX: ffffc900060ca000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff88807158a984 RBP: ffffffff88f78100 R08: 0000000000000000 R09: 0000000000020011 R10: 0000000000000000 R11: ffff88807158a100 R12: ffffffff816c0156 R13: ffff88807158a100 R14: dffffc0000000000 R15: ffffea0001c499e0 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] __do_page_cache_readahead+0x25d/0x940 mm/readahead.c:179 ra_submit mm/internal.h:66 [inline] ondemand_readahead.isra.0+0x514/0xb60 mm/readahead.c:486 page_cache_async_readahead mm/readahead.c:562 [inline] page_cache_async_readahead+0x16e/0x1d0 mm/readahead.c:538 generic_file_buffered_read mm/filemap.c:2011 [inline] generic_file_read_iter+0xea3/0x21c0 mm/filemap.c:2273 ext4_file_read_iter+0x14b/0x330 fs/ext4/file.c:76 call_read_iter include/linux/fs.h:1774 [inline] generic_file_splice_read+0x3a7/0x5c0 fs/splice.c:307 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 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: 0033:0x7f3899eed1f9 RSP: 002b:00007f3898862168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f3899ffff60 RCX: 00007f3899eed1f9 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007f3899f47161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000800000000035 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff15f2a8df R14: 00007f3898862300 R15: 0000000000022000 Code: 54 24 30 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 4b 27 00 00 41 8b 42 20 25 00 80 04 00 3d 00 00 04 00 0f 84 f9 01 00 00 <48> c7 c2 a0 2c 3d 89 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03