watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz-executor.3:20177] Modules linked in: irq event stamp: 12216131 hardirqs last enabled at (12216130): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 hardirqs last disabled at (12216131): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1100 softirqs last enabled at (11600454): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (11600454): [] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 softirqs last disabled at (11600457): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (11600457): [] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 CPU: 0 PID: 20177 Comm: syz-executor.3 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:deref_stack_reg+0xf6/0x150 arch/x86/kernel/unwind_orc.c:355 Code: 2b f6 ff 41 89 c0 31 c0 45 85 c0 75 27 48 ba 00 00 00 00 00 fc ff df 48 89 d9 48 89 ef e8 12 f9 ff ff 48 c1 e9 03 80 3c 11 00 <75> 31 48 89 03 b8 01 00 00 00 48 83 c4 08 5b 5d 41 5c 41 5d c3 e8 RSP: 0018:ffffc90000007628 EFLAGS: 00000246 RAX: ffffffff87ef7b87 RBX: ffffc90000007778 RCX: 1ffff92000000eef RDX: dffffc0000000000 RSI: ffffc90002037490 RDI: ffffc90002037490 RBP: ffffc90002037490 R08: ffffffff8e5f6420 R09: 0000000000000001 R10: fffff52000000ef1 R11: 0000000000086088 R12: ffffc90000007730 R13: ffffc90002030000 R14: ffffc90000007730 R15: ffffffff8e5f6424 FS: 00007fa423236700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002656848 CR3: 000000001982a000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: unwind_next_frame+0xcc3/0x1ce0 arch/x86/kernel/unwind_orc.c:534 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0x98/0xc0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_node_trace+0x20b/0x5d0 mm/slab.c:3619 __do_kmalloc_node mm/slab.c:3639 [inline] __kmalloc_node_track_caller+0x38/0x60 mm/slab.c:3654 kmalloc_reserve net/core/skbuff.c:355 [inline] __alloc_skb+0xde/0x340 net/core/skbuff.c:426 skb_copy+0x137/0x2f0 net/core/skbuff.c:1581 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb17/0x1330 drivers/net/wireless/mac80211_hwsim.c:1565 mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784 mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6326 Code: 55 53 65 48 8b 1c 25 40 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 22 7d 22 f8 e8 1d cb 4e f8 fb bf 01 00 00 00 d2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 30 6c 22 RSP: 0018:ffffc900020370b8 EFLAGS: 00000202 RAX: 000000000012bbd3 RBX: ffff88801ffac040 RCX: 1ffffffff1fa4fea RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed1003ff5808 R08: 0000000000000001 R09: ffffffff8fcdb9af R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:427 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197 Code: fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 89 11 8d 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9 RSP: 0018:ffffc90002037180 EFLAGS: 00000216 RAX: 0000000080000000 RBX: ffff888094d541d0 RCX: ffffc90018694000 RDX: 0000000000040000 RSI: ffffffff87ef467b RDI: 0000000000000003 RBP: ffff88806883f800 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff87ef466c R11: 0000000000000033 R12: 0000000000000000 R13: 00000000000001b8 R14: dffffc0000000000 R15: 0000000000000008 ipv6_skip_exthdr+0x268/0x520 net/ipv6/exthdrs_core.c:107 ipv6frag_thdr_truncated include/net/ipv6_frag.h:120 [inline] nf_ct_frag6_gather+0x45a/0x2880 net/ipv6/netfilter/nf_conntrack_reasm.c:459 ipv6_defrag net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:68 [inline] ipv6_defrag+0x1de/0x480 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:53 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:589 nf_hook include/linux/netfilter.h:262 [inline] __ip6_local_out+0x3f7/0x8a0 net/ipv6/output_core.c:149 ip6_local_out+0x26/0x1a0 net/ipv6/output_core.c:159 ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1935 ip6_push_pending_frames+0xdd/0x100 net/ipv6/ip6_output.c:1955 rawv6_push_pending_frames net/ipv6/raw.c:613 [inline] rawv6_sendmsg+0x2a87/0x3990 net/ipv6/raw.c:956 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 sock_no_sendpage+0xf3/0x130 net/core/sock.c:2959 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3673 kernel_sendpage net/socket.c:3670 [inline] sock_sendpage+0xe5/0x140 net/socket.c:1002 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] do_splice+0xb7e/0x1960 fs/splice.c:1079 __do_splice+0x134/0x250 fs/splice.c:1144 __do_sys_splice fs/splice.c:1350 [inline] __se_sys_splice fs/splice.c:1332 [inline] __x64_sys_splice+0x198/0x250 fs/splice.c:1332 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa423236188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 000000000004ff99 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007fffecbb7bef R14: 00007fa423236300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 15905 Comm: kworker/u4:1 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:90 [inline] RIP: 0010:kvm_wait arch/x86/kernel/kvm.c:888 [inline] RIP: 0010:kvm_wait+0xaf/0xf0 arch/x86/kernel/kvm.c:871 Code: 10 c3 c3 89 74 24 0c 48 89 3c 24 e8 eb dc 47 00 8b 74 24 0c 48 8b 3c 24 eb 82 e8 fc e1 47 00 eb 07 0f 00 2d c3 c5 55 08 fb f4 9b eb 07 0f 00 2d b6 c5 55 08 f4 eb c5 89 74 24 0c 48 89 3c 24 RSP: 0018:ffffc90000fd8a18 EFLAGS: 00000206 RAX: 0000000018932006 RBX: 0000000000000000 RCX: 1ffffffff1fa036a RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000000 RBP: ffffffff8c77c000 R08: 0000000000000001 R09: ffffffff8fcdb947 R10: 0000000000000001 R11: 0000000000000080 R12: 0000000000000000 R13: fffffbfff18ef800 R14: 0000000000000001 R15: ffff8880b9d52a00 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00148e010 CR3: 000000000b68e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516 mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784 mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390 Code: 1d ed 71 bc 7e 65 8b 05 e6 71 bc 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 f5 2a 09 00 e8 c0 89 35 00 fb 65 8b 05 c8 71 bc 7e <85> c0 74 58 5b 5d c3 65 8b 05 16 79 bc 7e 85 c0 75 a2 0f 0b eb 9e RSP: 0018:ffffc90002367b68 EFLAGS: 00000202 RAX: 0000000080000000 RBX: 00000000fffffe01 RCX: 1ffffffff1f9c3aa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff875beaf3 R08: 0000000000000001 R09: ffffffff8fcdb8f7 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8b664d80 R13: 0000000000007c0d R14: 0000000000000000 R15: 0000000000000001 local_bh_enable include/linux/bottom_half.h:32 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2219 [inline] nf_ct_iterate_cleanup+0x15a/0x450 net/netfilter/nf_conntrack_core.c:2242 nf_conntrack_cleanup_net_list+0x14c/0x4f0 net/netfilter/nf_conntrack_core.c:2436 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 2b f6 sub %esi,%esi 2: ff 41 89 incl -0x77(%rcx) 5: c0 31 c0 shlb $0xc0,(%rcx) 8: 45 85 c0 test %r8d,%r8d b: 75 27 jne 0x34 d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 48 89 d9 mov %rbx,%rcx 1a: 48 89 ef mov %rbp,%rdi 1d: e8 12 f9 ff ff callq 0xfffff934 22: 48 c1 e9 03 shr $0x3,%rcx 26: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) 2a: 75 31 jne 0x5d <-- trapping instruction 2c: 48 89 03 mov %rax,(%rbx) 2f: b8 01 00 00 00 mov $0x1,%eax 34: 48 83 c4 08 add $0x8,%rsp 38: 5b pop %rbx 39: 5d pop %rbp 3a: 41 5c pop %r12 3c: 41 5d pop %r13 3e: c3 retq 3f: e8 .byte 0xe8