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TCP recvmsg seq # bug 2: copied B5765DCD, seq B54C667F, rcvnxt B563603C, fl 40
WARNING: CPU: 1 PID: 6444 at net/ipv4/tcp.c:2648 tcp_recvmsg_locked+0xad1/0x2780 net/ipv4/tcp.c:2648
Modules linked in:
CPU: 1 UID: 0 PID: 6444 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller-g128c8f96eb86 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:tcp_recvmsg_locked+0xad1/0x2780 net/ipv4/tcp.c:2648
Code: 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b3 1b 00 00 48 8b 04 24 89 da 48 c7 c7 40 a1 aa 8c 44 8b 44 24 30 8b 30 e8 70 63 b7 f7 90 <0f> 0b 90 90 e9 1c fa ff ff e8 81 27 f7 f7 49 8d 5f 60 be 08 00 00
RSP: 0018:ffffc90003ef7488 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 00000000b54c667f RCX: ffffffff817a1159
RDX: ffff8880448d8000 RSI: ffffffff817a1166 RDI: 0000000000000001
RBP: 000000000000ffcb R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff8880335f8000 R14: ffff8880335f8034 R15: ffff8880335f8028
FS:  00007efce47dd6c0(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200012c0 CR3: 000000004249e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 receive_fallback_to_copy net/ipv4/tcp.c:1891 [inline]
 tcp_zerocopy_receive+0x1483/0x2620 net/ipv4/tcp.c:2123
 do_tcp_getsockopt+0x1b43/0x27d0 net/ipv4/tcp.c:4583
 tcp_getsockopt net/ipv4/tcp.c:4673 [inline]
 tcp_getsockopt+0xdf/0x100 net/ipv4/tcp.c:4664
 do_sock_getsockopt+0x3fe/0x800 net/socket.c:2364
 __sys_getsockopt+0x12f/0x260 net/socket.c:2393
 __do_sys_getsockopt net/socket.c:2400 [inline]
 __se_sys_getsockopt net/socket.c:2397 [inline]
 __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2397
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efce547cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efce47dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007efce55ac050 RCX: 00007efce547cee9
RDX: 0000000000000023 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007efce54c949e R08: 0000000020000380 R09: 0000000000000000
R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efce55ac050 R15: 00007ffd5a0999f8
 </TASK>