------------[ cut here ]------------ WARNING: CPU: 0 PID: 2635 at net/mptcp/subflow.c:1405 subflow_data_ready+0x39f/0x4e0 net/mptcp/subflow.c:1405 Modules linked in: CPU: 0 PID: 2635 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:subflow_data_ready+0x39f/0x4e0 net/mptcp/subflow.c:1405 Code: 18 89 ee e8 d3 7e 62 f7 40 84 ed 75 1f e8 99 83 62 f7 44 89 f6 bf 07 00 00 00 e8 fc 7e 62 f7 41 83 fe 07 74 07 e8 81 83 62 f7 <0f> 0b e8 7a 83 62 f7 48 89 df e8 02 b2 ff ff 31 ff 89 c5 89 c6 e8 RSP: 0018:ffffc9000ae56d58 EFLAGS: 00010283 RAX: 0000000000027b79 RBX: ffff888027ef4980 RCX: ffffc9000c363000 RDX: 0000000000040000 RSI: ffffffff8a2546af RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007 R10: 000000000000000b R11: ffffffff81dd5e23 R12: 1ffff920015cadab R13: ffff88806eecdc00 R14: 000000000000000b R15: ffff888077c69780 FS: 0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f20b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002c121000 CR3: 000000002740a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_data_ready+0x14c/0x5b0 net/ipv4/tcp_input.c:5034 tcp_data_queue+0x25fc/0x4f10 net/ipv4/tcp_input.c:5114 tcp_rcv_state_process+0x1871/0x4d00 net/ipv4/tcp_input.c:6728 tcp_v4_do_rcv+0x346/0x9e0 net/ipv4/tcp_ipv4.c:1751 sk_backlog_rcv include/net/sock.h:1121 [inline] __release_sock+0x132/0x3a0 net/core/sock.c:2983 release_sock+0x58/0x1b0 net/core/sock.c:3520 __mptcp_close_ssk+0x933/0xd40 net/mptcp/protocol.c:2419 mptcp_pm_nl_rm_addr_or_subflow+0x29e/0xa30 net/mptcp/pm_netlink.c:818 mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:849 [inline] mptcp_nl_remove_id_zero_address+0x310/0x4b0 net/mptcp/pm_netlink.c:1475 mptcp_nl_cmd_del_addr+0x5b6/0x760 net/mptcp/pm_netlink.c:1505 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:971 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2558 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2612 __sys_sendmsg+0x117/0x1e0 net/socket.c:2641 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f67579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f205ac EFLAGS: 00000292 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi