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TCP recvmsg seq # bug 2: copied E5E9275D, seq E5BF300F, rcvnxt E5D629B4, fl 40
WARNING: CPU: 1 PID: 6543 at net/ipv4/tcp.c:2661 tcp_recvmsg_locked+0xad1/0x2780 net/ipv4/tcp.c:2661
Modules linked in:
CPU: 1 UID: 0 PID: 6543 Comm: syz.0.16 Not tainted 6.14.0-rc5-syzkaller-g48a5eed9ad58 #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:2661
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 80 ad aa 8c 44 8b 44 24 30 8b 30 e8 b0 1a b7 f7 90 <0f> 0b 90 90 e9 1c fa ff ff e8 d1 eb f6 f7 49 8d 5f 60 be 08 00 00
RSP: 0018:ffffc9000318f488 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 00000000e5bf300f RCX: ffffffff817a1229
RDX: ffff88802655c880 RSI: ffffffff817a1236 RDI: 0000000000000001
RBP: 000000000000ffcb R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888024d68140 R14: ffff888024d68174 R15: ffff888024d68168
FS:  00007f06d35836c0(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06d3582f98 CR3: 0000000031940000 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:1910 [inline]
 tcp_zerocopy_receive+0x1483/0x2620 net/ipv4/tcp.c:2142
 do_tcp_getsockopt+0x1b43/0x27d0 net/ipv4/tcp.c:4596
 tcp_getsockopt net/ipv4/tcp.c:4686 [inline]
 tcp_getsockopt+0xdf/0x100 net/ipv4/tcp.c:4677
 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: 0033:0x7f06d278cde9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f06d3583038 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f06d29a6080 RCX: 00007f06d278cde9
RDX: 0000000000000023 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007f06d280e2a0 R08: 0000400000000380 R09: 0000000000000000
R10: 0000400000000340 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f06d29a6080 R15: 00007fff162db9a8
 </TASK>