------------[ cut here ]------------ WARNING: CPU: 1 PID: 17673 at include/net/mptcp.h:102 mptcp_skb_ext_move include/net/mptcp.h:102 [inline] WARNING: CPU: 1 PID: 17673 at include/net/mptcp.h:102 tcp_collapse+0x1316/0x16f0 net/ipv4/tcp_input.c:5138 Modules linked in: CPU: 1 PID: 17673 Comm: syz-executor.1 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mptcp_skb_ext_move include/net/mptcp.h:102 [inline] RIP: 0010:tcp_collapse+0x1316/0x16f0 net/ipv4/tcp_input.c:5138 Code: e8 8f 52 ff f9 8b 1c 24 31 ff 2b 9c 24 68 01 00 00 89 de e8 cc 4a ff f9 85 db 0f 88 fd f2 ff ff e9 72 fc ff ff e8 6a 52 ff f9 <0f> 0b 48 8d 85 d8 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 RSP: 0018:ffffc900027f7680 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000008 RCX: ffffc9000ace9000 RDX: 0000000000040000 RSI: ffffffff8770c766 RDI: 0000000000000001 RBP: ffff888013221500 R08: 0000000000000001 R09: ffff88802297a54b R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802c61b260 R13: ffff88801322157f R14: 0000000000000ec0 R15: ffff88802c61b2df FS: 00007f8e18866700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002040003f CR3: 000000001169a000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_prune_queue net/ipv4/tcp_input.c:5295 [inline] tcp_try_rmem_schedule+0xbc9/0x16e0 net/ipv4/tcp_input.c:4680 tcp_data_queue+0x17bd/0x4b10 net/ipv4/tcp_input.c:4949 tcp_rcv_established+0x841/0x1eb0 net/ipv4/tcp_input.c:5867 tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1652 sk_backlog_rcv include/net/sock.h:1010 [inline] __release_sock+0x134/0x3a0 net/core/sock.c:2523 release_sock+0x54/0x1b0 net/core/sock.c:3053 mptcp_sendmsg+0xf75/0x1970 net/mptcp/protocol.c:1319 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 __sys_sendto+0x21c/0x320 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45deb9 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8e18865c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000002e900 RCX: 000000000045deb9 RDX: 00000000ffffffe7 RSI: 0000000020000100 RDI: 0000000000000004 RBP: 000000000118bf78 R08: 0000000000000000 R09: 8000000000000000 R10: 000000000000c000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd744eb7df R14: 00007f8e188669c0 R15: 000000000118bf2c