------------[ cut here ]------------
WARNING: CPU: 1 PID: 20782 at net/mptcp/pm_netlink.c:1496 __mark_subflow_endp_available net/mptcp/pm_netlink.c:1496 [inline]
WARNING: CPU: 1 PID: 20782 at net/mptcp/pm_netlink.c:1496 __mark_subflow_endp_available+0x12e/0x140 net/mptcp/pm_netlink.c:1492
Modules linked in:
CPU: 1 UID: 0 PID: 20782 Comm: syz.3.4677 Not tainted 6.13.0-syzkaller-06167-g0afd22092df4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_netlink.c:1496 [inline]
RIP: 0010:__mark_subflow_endp_available+0x12e/0x140 net/mptcp/pm_netlink.c:1492
Code: 48 0f ab 9d f0 0a 00 00 5b 5d 41 5c 41 5d e9 59 65 75 f6 e8 74 6d d8 f6 eb ca e8 6d 6d d8 f6 e9 60 ff ff ff e8 43 65 75 f6 90 <0f> 0b 90 e9 78 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc9000ea373c8 EFLAGS: 00010287
RAX: 000000000000374e RBX: 0000000000000000 RCX: ffffc90010d2a000
RDX: 0000000000080000 RSI: ffffffff8b44626d RDI: 0000000000000001
RBP: ffff8880290ab000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff8880290abaf0
R13: dffffc0000000000 R14: 0000000000000008 R15: 0000000000000001
FS:  00007fc68e0616c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c39780f CR3: 00000000605e4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mptcp_pm_nl_fullmesh net/mptcp/pm_netlink.c:1950 [inline]
 mptcp_nl_set_flags net/mptcp/pm_netlink.c:1973 [inline]
 mptcp_pm_nl_set_flags+0x7d9/0xa80 net/mptcp/pm_netlink.c:2034
 mptcp_pm_set_flags+0x88/0xb0 net/mptcp/pm.c:456
 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2568
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2622
 __sys_sendmsg+0x16e/0x220 net/socket.c:2654
 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: 0033:0x7fc68d18cd29
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:00007fc68e061038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc68d3a5fa0 RCX: 00007fc68d18cd29
RDX: 0000000000000080 RSI: 0000000020000480 RDI: 0000000000000005
RBP: 00007fc68d20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc68d3a5fa0 R15: 00007fff2a92c6e8
 </TASK>