TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:4409] Modules linked in: irq event stamp: 10819787 hardirqs last enabled at (10819786): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (10819787): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (10796996): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (10796999): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4409 Comm: syz-executor.4 Not tainted 5.10.149 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__orc_find+0x2/0xf0 arch/x86/kernel/unwind_orc.c:37 Code: 44 4b 5b 00 e9 8c fd ff ff e8 3a 4b 5b 00 e9 44 fd ff ff cc cc cc cc cc 48 8b 07 e9 68 c5 0f 03 0f 1f 84 00 00 00 00 00 41 57 <89> d0 41 56 41 55 41 54 4c 8d 64 87 fc 55 53 48 83 ec 10 85 d2 0f RSP: 0018:ffff88806ce09640 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff816ba411 RDX: 0000000000000014 RSI: ffffffff85a03ff0 RDI: ffffffff857173b4 RBP: ffff88806ce0975d R08: ffffffff85a03ff0 R09: ffffffff85a04068 R10: 0000000000032042 R11: 1ffff1100d9c12d2 R12: ffff88806ce09770 R13: ffff88806ce09728 R14: 1ffff1100d9c12d2 R15: ffffffff816ba411 FS: 00007f7a05eb9700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557d01734078 CR3: 0000000044028000 CR4: 0000000000350ef0 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x310 mm/slub.c:3165 __skb_ext_put+0x120/0x2d0 net/core/skbuff.c:6379 skb_ext_reset include/linux/skbuff.h:4247 [inline] mac80211_hwsim_tx_frame_no_nl.isra.0+0x1053/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1426 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1711 mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1765 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1788 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:put_cpu_partial+0x9/0x130 mm/slub.c:2379 Code: 0f 82 47 ff ff ff 48 8b 44 24 08 4c 89 7c 24 08 49 89 47 08 e9 5e ff ff ff e8 43 ce 74 02 0f 1f 00 41 56 65 ff 05 f7 21 97 7e <41> 55 41 54 41 89 d4 55 48 89 fd 53 48 89 f3 e9 85 00 00 00 8b 7e RSP: 0018:ffff88804581f5c0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000080120011 RDX: 0000000000000001 RSI: ffffea00010f5680 RDI: ffff888007c4d640 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff816bc901 R10: ffff888043d5a000 R11: 0000000000000001 R12: ffff88804581f608 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff888045041b80 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x360 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x1a6/0x3f0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xb1/0x620 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1094 [inline] nlmsg_new include/net/netlink.h:953 [inline] rtmsg_ifinfo_build_skb+0x72/0x1a0 net/core/rtnetlink.c:3808 rtmsg_ifinfo_event net/core/rtnetlink.c:3844 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3835 [inline] rtmsg_ifinfo+0x83/0x120 net/core/rtnetlink.c:3853 register_netdevice+0x11b8/0x1480 net/core/dev.c:10059 register_netdev+0x2d/0x50 net/core/dev.c:10138 loopback_net_init+0x73/0x170 drivers/net/loopback.c:216 ops_init net/core/net_namespace.c:152 [inline] setup_net+0x377/0x970 net/core/net_namespace.c:344 copy_net_ns+0x2ca/0x5e0 net/core/net_namespace.c:485 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x39e/0x480 kernel/nsproxy.c:179 copy_process+0x2463/0x66f0 kernel/fork.c:2109 kernel_clone+0xe7/0xa20 kernel/fork.c:2467 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2742 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f7a08964b19 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:00007f7a05eb9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f7a08a78020 RCX: 00007f7a08964b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000200 RBP: 00007f7a089bef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0413663f R14: 00007f7a05eb9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4406 Comm: syz-executor.4 Not tainted 5.10.149 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:25 [inline] RIP: 0010:static_key_false include/linux/jump_label.h:200 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:162 [inline] RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:281 [inline] RIP: 0010:lapic_next_deadline+0x21/0x50 arch/x86/kernel/apic/apic.c:480 Code: 2e 0f 1f 84 00 00 00 00 00 0f ae f0 0f ae e8 0f 31 48 c1 e2 20 b9 e0 06 00 00 48 09 c2 48 8d 04 fa 48 89 c2 48 c1 ea 20 0f 30 <0f> 1f 44 00 00 31 c0 e9 03 32 12 03 48 89 c6 31 d2 bf e0 06 00 00 RSP: 0018:ffff88806cf095c0 EFLAGS: 00000016 RAX: 000000e13b47c70c RBX: 0000000000000000 RCX: 00000000000006e0 RDX: 00000000000000e1 RSI: ffff88806cf27980 RDI: 0000000000000163 RBP: ffff88806cf27980 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000163 R13: 0000000000000000 R14: 7fffffffffffffff R15: 0000000000000000 FS: 00007f7a05eda700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557d0176aac0 CR3: 0000000044028000 CR4: 0000000000350ee0 Call Trace: clockevents_program_event+0x244/0x360 kernel/time/clockevents.c:334 tick_program_event+0xa0/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x3e1/0x9b0 kernel/time/hrtimer.c:1722 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1084 [inline] __sysvec_apic_timer_interrupt+0xfb/0x400 arch/x86/kernel/apic/apic.c:1101 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x3e/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:unwind_next_frame+0x61/0x1a90 arch/x86/kernel/unwind_orc.c:423 Code: eb 03 48 c7 44 24 50 20 82 10 81 49 8d 14 03 4d 89 de c7 02 f1 f1 f1 f1 c7 42 04 00 f3 f3 f3 48 89 fa 48 c1 ea 03 0f b6 04 02 <65> 48 8b 1c 25 28 00 00 00 48 89 9c 24 98 00 00 00 31 db 84 c0 74 RSP: 0018:ffff88806cf097b8 EFLAGS: 00000216 RAX: 0000000000000000 RBX: ffffffff812fc330 RCX: 1ffff1100d9e1301 RDX: 1ffff1100d9e1312 RSI: ffffffff84000099 RDI: ffff88806cf09890 RBP: ffff88806cf09918 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12ff R12: ffff88806cf09948 R13: ffff88806cf09890 R14: 1ffff1100d9e12ff R15: ffff88801e9d3b40 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x310 mm/slub.c:3165 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:636 __kfree_skb net/core/skbuff.c:694 [inline] consume_skb net/core/skbuff.c:849 [inline] consume_skb+0xcf/0x160 net/core/skbuff.c:843 mac80211_hwsim_tx_frame+0x15a/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1712 mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1765 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1788 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__schedule+0x895/0x1e90 kernel/sched/core.c:4429 Code: 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 51 11 00 00 48 8b 85 70 ff ff ff 48 83 b8 80 0a 00 00 00 0f 85 b5 0c 00 00 <48> 8b 8d 30 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 RSP: 0018:ffff88804614f728 EFLAGS: 00000246 RAX: ffff88806cf3b2c0 RBX: ffff88806cf3b2d8 RCX: 1ffffffff0cf3ab2 RDX: 1ffff1100d9e77a8 RSI: 0000000000000000 RDI: ffff888020924640 RBP: ffff88804614f7f8 R08: 0000000000000001 R09: ffffffff8679766f R10: fffffbfff0cf2ecd R11: 0000000000000001 R12: ffff88806cf3bd40 R13: ffff888020923300 R14: ffff8880209236f0 R15: ffff88800e129980 preempt_schedule_common kernel/sched/core.c:4705 [inline] _cond_resched+0x49/0x80 kernel/sched/core.c:6120 inet_twsk_purge+0xed/0x7d0 net/ipv4/inet_timewait_sock.c:267 ops_exit_list+0x12b/0x180 net/core/net_namespace.c:192 setup_net+0x707/0x970 net/core/net_namespace.c:367 copy_net_ns+0x2ca/0x5e0 net/core/net_namespace.c:485 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x39e/0x480 kernel/nsproxy.c:179 copy_process+0x2463/0x66f0 kernel/fork.c:2109 kernel_clone+0xe7/0xa20 kernel/fork.c:2467 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2742 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f7a08964b19 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:00007f7a05eda188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f7a08a77f60 RCX: 00007f7a08964b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000200 RBP: 00007f7a089bef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0413663f R14: 00007f7a05eda300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: e9 8c fd ff ff jmpq 0xfffffd91 5: e8 3a 4b 5b 00 callq 0x5b4b44 a: e9 44 fd ff ff jmpq 0xfffffd53 f: cc int3 10: cc int3 11: cc int3 12: cc int3 13: cc int3 14: 48 8b 07 mov (%rdi),%rax 17: e9 68 c5 0f 03 jmpq 0x30fc584 1c: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 23: 00 24: 41 57 push %r15 * 26: 89 d0 mov %edx,%eax <-- trapping instruction 28: 41 56 push %r14 2a: 41 55 push %r13 2c: 41 54 push %r12 2e: 4c 8d 64 87 fc lea -0x4(%rdi,%rax,4),%r12 33: 55 push %rbp 34: 53 push %rbx 35: 48 83 ec 10 sub $0x10,%rsp 39: 85 d2 test %edx,%edx 3b: 0f .byte 0xf