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. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9 at net/core/stream.c:212 sk_stream_kill_queues+0x2ba/0x390 net/core/stream.c:212 Modules linked in: CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.10.170 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:sk_stream_kill_queues+0x2ba/0x390 net/core/stream.c:212 Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e e2 00 00 00 8b ab 20 02 00 00 e9 60 ff ff ff e8 bf d0 2d fe 0f 0b eb 97 e8 b6 d0 2d fe <0f> 0b eb a0 e8 ad d0 2d fe 0f 0b e9 a5 fe ff ff 4c 89 e7 e8 ce 81 RSP: 0018:ffff8880085276e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83126b9a RDX: ffff888008518000 RSI: ffffffff83126bfa RDI: 0000000000000005 RBP: 0000000000000ffe R08: 0000000000000001 R09: ffffffff867997af R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880481f0220 R13: ffffffff8795adc0 R14: ffff8880481f0028 R15: ffff88801c2ca920 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32125000 CR3: 000000004c1d2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: inet_csk_destroy_sock+0x1aa/0x440 net/ipv4/inet_connection_sock.c:893 tcp_done+0x241/0x340 net/ipv4/tcp.c:4172 tcp_rcv_state_process+0x41b9/0x4aa0 net/ipv4/tcp_input.c:6544 tcp_v6_do_rcv+0x3e4/0x1500 net/ipv6/tcp_ipv6.c:1525 tcp_v6_rcv+0x2e5d/0x3460 net/ipv6/tcp_ipv6.c:1732 ip6_protocol_deliver_rcu+0x2f5/0x1790 net/ipv6/ip6_input.c:427 ip6_input_finish+0x64/0x180 net/ipv6/ip6_input.c:468 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:477 dst_input include/net/dst.h:448 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:80 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:70 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ipv6_rcv+0x141/0x240 net/ipv6/ip6_input.c:301 __netif_receive_skb_one_core+0x12e/0x1f0 net/core/dev.c:5361 __netif_receive_skb+0x27/0x1d0 net/core/dev.c:5475 process_backlog+0x38f/0x7e0 net/core/dev.c:6381 napi_poll net/core/dev.c:6832 [inline] net_rx_action+0x3ff/0xff0 net/core/dev.c:6902 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 run_ksoftirqd kernel/softirq.c:653 [inline] run_ksoftirqd+0x25/0x50 kernel/softirq.c:645 smpboot_thread_fn+0x3f5/0x860 kernel/smpboot.c:164 kthread+0x38f/0x470 kernel/kthread.c:313 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:299 irq event stamp: 8671604 hardirqs last enabled at (8671610): [] console_trylock_spinning kernel/printk/printk.c:1849 [inline] hardirqs last enabled at (8671610): [] vprintk_emit+0x486/0x4d0 kernel/printk/printk.c:2053 hardirqs last disabled at (8671615): [] console_trylock_spinning kernel/printk/printk.c:1828 [inline] hardirqs last disabled at (8671615): [] vprintk_emit+0x418/0x4d0 kernel/printk/printk.c:2053 softirqs last enabled at (8671194): [] run_ksoftirqd kernel/softirq.c:653 [inline] softirqs last enabled at (8671194): [] run_ksoftirqd+0x25/0x50 kernel/softirq.c:645 softirqs last disabled at (8671199): [] run_ksoftirqd kernel/softirq.c:653 [inline] softirqs last disabled at (8671199): [] run_ksoftirqd+0x25/0x50 kernel/softirq.c:645 ---[ end trace 93f57117228bc00d ]--- TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 65862 at net/core/stream.c:212 sk_stream_kill_queues+0x2ba/0x390 net/core/stream.c:212 Modules linked in: CPU: 0 PID: 65862 Comm: syz-executor.7 Tainted: G W 5.10.170 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:sk_stream_kill_queues+0x2ba/0x390 net/core/stream.c:212 Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e e2 00 00 00 8b ab 20 02 00 00 e9 60 ff ff ff e8 bf d0 2d fe 0f 0b eb 97 e8 b6 d0 2d fe <0f> 0b eb a0 e8 ad d0 2d fe 0f 0b e9 a5 fe ff ff 4c 89 e7 e8 ce 81 RSP: 0018:ffff88806ce09868 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83126b9a RDX: ffff8880490a3380 RSI: ffffffff83126bfa RDI: 0000000000000005 RBP: 0000000000000ffe R08: 0000000000000001 R09: ffffffff867997af R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880481f40a0 R13: ffffffff8795adc0 R14: ffff8880481f3ea8 R15: ffff88801c036920 FS: 00007f8726829700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8726807d58 CR3: 000000004c1d2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: inet_csk_destroy_sock+0x1aa/0x440 net/ipv4/inet_connection_sock.c:893 tcp_done+0x241/0x340 net/ipv4/tcp.c:4172 tcp_rcv_state_process+0x41b9/0x4aa0 net/ipv4/tcp_input.c:6544 tcp_v6_do_rcv+0x3e4/0x1500 net/ipv6/tcp_ipv6.c:1525 tcp_v6_rcv+0x2e5d/0x3460 net/ipv6/tcp_ipv6.c:1732 ip6_protocol_deliver_rcu+0x2f5/0x1790 net/ipv6/ip6_input.c:427 ip6_input_finish+0x64/0x180 net/ipv6/ip6_input.c:468 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:477 dst_input include/net/dst.h:448 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:80 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:70 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ipv6_rcv+0x141/0x240 net/ipv6/ip6_input.c:301 __netif_receive_skb_one_core+0x12e/0x1f0 net/core/dev.c:5361 __netif_receive_skb+0x27/0x1d0 net/core/dev.c:5475 process_backlog+0x38f/0x7e0 net/core/dev.c:6381 napi_poll net/core/dev.c:6832 [inline] net_rx_action+0x3ff/0xff0 net/core/dev.c:6902 __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:fsnotify+0xdaf/0xf30 fs/notify/fsnotify.c:499 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e8 00 00 00 49 83 bd c8 03 00 00 00 0f 85 06 f4 ff ff 45 31 e4 dc fb ff ff e8 b7 f2 be ff 0f 0b e9 aa fb ff ff 31 ed e9 59 f3 RSP: 0018:ffff888049db7908 EFLAGS: 00000246 RAX: 0000000000001da4 RBX: ffff88801a629e68 RCX: ffffc90004a30000 RDX: 0000000000040000 RSI: ffffffff818149b2 RDI: ffff88801a62a230 RBP: ffff88800845a480 R08: 0000000000000000 R09: ffff88801a629e68 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88800847c678 R15: 0000000000000001 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_perm include/linux/fsnotify.h:115 [inline] fsnotify_perm include/linux/fsnotify.h:94 [inline] security_file_open+0x2a3/0x500 security/security.c:1595 do_dentry_open+0x353/0x1090 fs/open.c:804 do_open fs/namei.c:3257 [inline] path_openat+0x193d/0x26d0 fs/namei.c:3376 do_filp_open+0x190/0x3e0 fs/namei.c:3403 do_sys_openat2+0x171/0x420 fs/open.c:1186 do_sys_open fs/open.c:1202 [inline] __do_sys_openat fs/open.c:1218 [inline] __se_sys_openat fs/open.c:1213 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1213 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f8729266a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f87268290b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f87293c6f60 RCX: 00007f8729266a04 RDX: 0000000000000000 RSI: 00007f872930cf82 RDI: 00000000ffffff9c RBP: 00007f872930cf82 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffe59b597ef R14: 00007f8726829300 R15: 0000000000022000 irq event stamp: 4416 hardirqs last enabled at (4424): [] console_trylock_spinning kernel/printk/printk.c:1849 [inline] hardirqs last enabled at (4424): [] vprintk_emit+0x486/0x4d0 kernel/printk/printk.c:2053 hardirqs last disabled at (4429): [] console_trylock_spinning kernel/printk/printk.c:1828 [inline] hardirqs last disabled at (4429): [] vprintk_emit+0x418/0x4d0 kernel/printk/printk.c:2053 softirqs last enabled at (3398): [] tcp_close+0x84c/0x1140 net/ipv4/tcp.c:2683 softirqs last disabled at (3499): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 93f57117228bc00e ]--- SELinux: unrecognized netlink message: protocol=0 nlmsg_type=24386 sclass=netlink_route_socket pid=66225 comm=syz-executor.0 TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=24386 sclass=netlink_route_socket pid=66323 comm=syz-executor.0 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 e8 00 00 00 jne 0xfa 12: 49 83 bd c8 03 00 00 cmpq $0x0,0x3c8(%r13) 19: 00 1a: 0f 85 06 f4 ff ff jne 0xfffff426 20: 45 31 e4 xor %r12d,%r12d * 23: e9 dc fb ff ff jmpq 0xfffffc04 <-- trapping instruction 28: e8 b7 f2 be ff callq 0xffbef2e4 2d: 0f 0b ud2 2f: e9 aa fb ff ff jmpq 0xfffffbde 34: 31 ed xor %ebp,%ebp 36: e9 .byte 0xe9 37: 59 pop %rcx 38: f3 repz