------------[ cut here ]------------
WARNING: CPU: 1 PID: 27254 at net/core/skbuff.c:6072 skb_try_coalesce+0x18d3/0x1db0 net/core/skbuff.c:6072
Modules linked in:
CPU: 1 UID: 0 PID: 27254 Comm: syz.5.8980 Not tainted 6.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:skb_try_coalesce+0x18d3/0x1db0 net/core/skbuff.c:6072
Code: 00 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 e3 04 00 00 48 8b 85 d0 00 00 00 48 89 44 24 38 e9 3d ef ff ff e8 be c8 96 f8 90 <0f> 0b 90 e9 ea f3 ff ff e8 b0 c8 96 f8 48 8b 44 24 68 48 83 e8 01
RSP: 0018:ffffc9000396f370 EFLAGS: 00010287
RAX: 0000000000002af6 RBX: ffff8880667ce0f0 RCX: ffffc9001da83000
RDX: 0000000000080000 RSI: ffffffff89034b82 RDI: 0000000000000004
RBP: ffff8880667ce370 R08: 0000000000000004 R09: 0000000000007c6f
R10: 0000000000007def R11: 0000000000000002 R12: ffff888079820ac0
R13: ffff8880667ce16e R14: 0000000000007def R15: 0000000000007c6f
FS: 00007f24c0e376c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000002e12e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mptcp_try_coalesce+0x128/0x310 net/mptcp/protocol.c:139
__mptcp_move_skb net/mptcp/protocol.c:374 [inline]
__mptcp_move_skbs_from_subflow+0xf8d/0x24c0 net/mptcp/protocol.c:703
move_skbs_to_msk net/mptcp/protocol.c:829 [inline]
mptcp_data_ready+0x30e/0x8e0 net/mptcp/protocol.c:872
subflow_data_ready+0x51d/0x7d0 net/mptcp/subflow.c:1507
tcp_data_ready+0x146/0x5b0 net/ipv4/tcp_input.c:5220
tcp_data_queue+0x1a6f/0x4d80 net/ipv4/tcp_input.c:5310
tcp_rcv_established+0x7df/0x20d0 net/ipv4/tcp_input.c:6264
tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1916
sk_backlog_rcv include/net/sock.h:1121 [inline]
__release_sock+0x31b/0x400 net/core/sock.c:3083
release_sock+0x5a/0x220 net/core/sock.c:3637
__mptcp_push_pending+0x400/0x560 net/mptcp/protocol.c:1643
mptcp_sendmsg+0x1960/0x1f20 net/mptcp/protocol.c:1928
inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:851
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
__sys_sendto+0x42a/0x4f0 net/socket.c:2197
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200
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: 0033:0x7f24bff85d19
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:00007f24c0e37038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f24c0175fa0 RCX: 00007f24bff85d19
RDX: 000000000000fdef RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f24c0001a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f24c0175fa0 R15: 00007ffd8ba1b548
</TASK>