WARNING in tcp_enter

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in tcp_enter_loss net				1	2551d	2546d	0/28	closed as invalid on 2018/02/13 19:39
android-49	WARNING in tcp_enter_loss	C			4	2408d	2055d	0/3	public: reported C repro on 2019/04/14 00:00
upstream	WARNING in tcp_enter_loss (2) net	C	done	unreliable	4	2403d	2453d	15/28	fixed on 2020/02/18 10:28
upstream	WARNING in tcp_enter_loss (3) net	C	inconclusive		7	760d	1057d	22/28	fixed on 2023/02/24 13:50

------------[ cut here ]------------ WARNING: CPU: 0 PID: 9143 at net/ipv4/tcp_input.c:1974 tcp_timeout_mark_lost net/ipv4/tcp_input.c:1974 [inline] WARNING: CPU: 0 PID: 9143 at net/ipv4/tcp_input.c:1974 tcp_enter_loss.cold+0x11/0x18 net/ipv4/tcp_input.c:1986 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9143 Comm: syz-executor988 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:tcp_timeout_mark_lost net/ipv4/tcp_input.c:1974 [inline] RIP: 0010:tcp_enter_loss.cold+0x11/0x18 net/ipv4/tcp_input.c:1986 Code: ee 55 89 e8 2a eb e0 ff 0f 0b e9 fe 4a c7 fe 48 89 cf e8 10 96 85 f9 eb ce e8 a9 b9 4f f9 48 c7 c7 e0 ee 55 89 e8 08 eb e0 ff <0f> 0b e9 6c 71 c7 fe e8 91 b9 4f f9 48 c7 c7 e0 ee 55 89 e8 f0 ea RSP: 0018:ffff8880aa1ffa88 EFLAGS: 00010282 RAX: 0000000000000024 RBX: 0000000000000011 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101543ff43 RBP: 0000000000000009 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880ae814954 R14: ffffed1015d0281e R15: ffff8880ae8140c0 tcp_retransmit_timer+0x25de/0x33f0 net/ipv4/tcp_timer.c:474 tcp_write_timer_handler+0x5e6/0xa60 net/ipv4/tcp_timer.c:593 tcp_release_cb+0x275/0x2f0 net/ipv4/tcp_output.c:875 release_sock+0xb4/0x1b0 net/core/sock.c:2907 do_tcp_setsockopt.constprop.0+0x42e/0x2340 net/ipv4/tcp.c:3098 tcp_setsockopt net/ipv4/tcp.c:3110 [inline] tcp_setsockopt+0xb2/0xd0 net/ipv4/tcp.c:3102 __sys_setsockopt+0x14d/0x240 net/socket.c:2013 __do_sys_setsockopt net/socket.c:2024 [inline] __se_sys_setsockopt net/socket.c:2021 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3989ee58a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3989e722f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f3989f6e4b0 RCX: 00007f3989ee58a9 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007f3989f6e4bc R08: 000000002000019f R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00007f3989f3b70c R13: 00007f3989f3b4a8 R14: 0000000020000640 R15: 00007f3989f6e4b8 Kernel Offset: disabled Rebooting in 86400 seconds..