WARNING: CPU: 0 PID: 4456 at net/ipv4/tcp_input.c:1955 tcp_enter_loss+0xe4f/0x1110 net/ipv4/tcp_input.c:1955 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4456 Comm: syz-executor694 Not tainted 4.17.0-rc2+ #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:tcp_enter_loss+0xe4f/0x1110 net/ipv4/tcp_input.c:1955 RSP: 0018:ffff8801b66c7560 EFLAGS: 00010293 RAX: ffff8801b66686c0 RBX: 0000000000000001 RCX: ffffffff864ac155 RDX: 0000000000000000 RSI: ffffffff864ac5bf RDI: 0000000000000004 RBP: ffff8801b66c75e0 R08: ffff8801b66686c0 R09: 0000000000000000 R10: ffffed0043fff001 R11: ffff88021fff8017 R12: 0000000000000003 R13: 0000000000000002 R14: ffff8801c8c6dd30 R15: ffff8801d02e5500 WARNING: CPU: 1 PID: 4450 at net/ipv4/tcp_input.c:1955 tcp_enter_loss+0xe4f/0x1110 net/ipv4/tcp_input.c:1955 tcp_retransmit_timer+0xc34/0x3060 net/ipv4/tcp_timer.c:486 Modules linked in: CPU: 1 PID: 4450 Comm: syz-executor694 Not tainted 4.17.0-rc2+ #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tcp_enter_loss+0xe4f/0x1110 net/ipv4/tcp_input.c:1955 RSP: 0018:ffff8801b60b7560 EFLAGS: 00010293 RAX: ffff8801b662e500 RBX: 0000000000000001 RCX: ffffffff864ac155 RDX: 0000000000000000 RSI: ffffffff864ac5bf RDI: 0000000000000004 RBP: ffff8801b60b75e0 R08: ffff8801b662e500 R09: 0000000000000000 R10: ffffed0043fff009 R11: ffff88021fff8057 R12: 0000000000000003 R13: 0000000000000002 R14: ffff8801cc3cf870 R15: ffff8801cd4f0a80 FS: 00000000015e1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 00000001b631c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_write_timer_handler+0x339/0x960 net/ipv4/tcp_timer.c:573 tcp_retransmit_timer+0xc34/0x3060 net/ipv4/tcp_timer.c:486 tcp_release_cb+0x25e/0x2d0 net/ipv4/tcp_output.c:871 release_sock+0x107/0x2b0 net/core/sock.c:2856 do_tcp_setsockopt.isra.38+0x48e/0x2600 net/ipv4/tcp.c:2880 tcp_write_timer_handler+0x339/0x960 net/ipv4/tcp_timer.c:573 tcp_setsockopt+0xc1/0xe0 net/ipv4/tcp.c:2892 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3039 tcp_release_cb+0x25e/0x2d0 net/ipv4/tcp_output.c:871 __sys_setsockopt+0x1bd/0x390 net/socket.c:1903 release_sock+0x107/0x2b0 net/core/sock.c:2856 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 do_tcp_setsockopt.isra.38+0x48e/0x2600 net/ipv4/tcp.c:2880 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441bc9 RSP: 002b:00007ffe202bc838 EFLAGS: 00000207 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441bc9 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00000000006cd018 R08: 000000002000023b R09: 0000000000000010 tcp_setsockopt+0xc1/0xe0 net/ipv4/tcp.c:2892 R10: 0000000020000040 R11: 0000000000000207 R12: 0000000000402810 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3039 R13: 00000000004028a0 R14: 0000000000000000 R15: 0000000000000000 __sys_setsockopt+0x1bd/0x390 net/socket.c:1903 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441bc9 RSP: 002b:00007ffe202bc838 EFLAGS: 00000207 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441bc9 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00000000006cd018 R08: 000000002000023b R09: 0000000000000010 R10: 0000000020000040 R11: 0000000000000207 R12: 0000000000402810 R13: 00000000004028a0 R14: 0000000000000000 R15: 0000000000000000 Code: 89 a7 38 08 00 00 e9 07 fc ff ff 49 8d 87 78 09 00 00 48 89 45 88 49 8d 87 68 07 00 00 48 89 45 d0 e9 c5 f2 ff ff e8 91 6a 2e fb <0f> 0b e9 98 fb ff ff e8 55 cb 6a fb e9 de f6 ff ff 48 8b 7d d0 irq event stamp: 76541 hardirqs last enabled at (76539): [] restore_regs_and_return_to_kernel+0x0/0x2b hardirqs last disabled at (76541): [] error_entry+0x76/0xd0 arch/x86/entry/entry_64.S:1262 softirqs last enabled at (76528): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (76540): [] spin_lock_bh include/linux/spinlock.h:315 [inline] softirqs last disabled at (76540): [] release_sock+0x74/0x2b0 net/core/sock.c:2848 ---[ end trace a7562162d42a707b ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..