WARNING: CPU: 1 PID: 8398 at net/ipv4/tcp_input.c:2613 tcp_cwnd_reduction+0x321/0x380 net/ipv4/tcp_input.c:2613
Modules linked in:
CPU: 3 PID: 8398 Comm: syz-executor.3 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:tcp_cwnd_reduction+0x321/0x380 net/ipv4/tcp_input.c:2613
Code: 80 09 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 e2 da c5 f9 e8 dd da c5 f9 41 39 ec 41 0f 4e ec eb 89 e8 cf da c5 f9 <0f> 0b eb d6 e8 a6 18 0c fa e9 38 fd ff ff e8 9c 18 0c fa e9 20 fe
RSP: 0018:ffffc90003fbf2b0 EFLAGS: 00010206
RAX: 0000000000002340 RBX: ffff888064b21100 RCX: ffffc90021bd9000
RDX: 0000000000040000 RSI: ffffffff87b10cd1 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87b10a28 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000004 R15: ffff888064b21100
FS:  00007fb596f37700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33426000 CR3: 000000006f5b2000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tcp_cong_control net/ipv4/tcp_input.c:3485 [inline]
 tcp_ack+0x4160/0x5920 net/ipv4/tcp_input.c:3889
 tcp_rcv_established+0x5d7/0x2130 net/ipv4/tcp_input.c:5936
 tcp_v4_do_rcv+0x600/0x8d0 net/ipv4/tcp_ipv4.c:1716
 sk_backlog_rcv include/net/sock.h:1030 [inline]
 __release_sock+0x134/0x3b0 net/core/sock.c:2768
 release_sock+0x54/0x1b0 net/core/sock.c:3300
 sk_wait_data+0x177/0x450 net/core/sock.c:2810
 tcp_recvmsg_locked+0xe02/0x20d0 net/ipv4/tcp.c:2419
 tcp_recvmsg+0x12b/0x550 net/ipv4/tcp.c:2534
 inet_recvmsg+0x11b/0x5e0 net/ipv4/af_inet.c:850
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 sock_recvmsg net/socket.c:958 [inline]
 ____sys_recvmsg+0x2c4/0x600 net/socket.c:2628
 ___sys_recvmsg+0x127/0x200 net/socket.c:2670
 __sys_recvmsg+0xe2/0x1a0 net/socket.c:2700
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb5985e2e99
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb596f37168 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fb5986f6030 RCX: 00007fb5985e2e99
RDX: 0000000000000700 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 00007fb59863cff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcbacfaf5f R14: 00007fb596f37300 R15: 0000000000022000
 </TASK>