------------[ cut here ]------------
Bad mapping: ssn=2587084 map_seq=1 map_data_len=32740
WARNING: CPU: 1 PID: 8436 at net/mptcp/subflow.c:556 warn_bad_map.isra.6.part.7+0x70/0xa0 net/mptcp/subflow.c:555
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8436 Comm: syz-executor.0 Not tainted 5.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x128/0x182 lib/dump_stack.c:118
 panic+0x22a/0x4e3 kernel/panic.c:221
 __warn.cold.10+0x25/0x26 kernel/panic.c:582
 report_bug+0x1ad/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 do_error_trap+0x123/0x210 arch/x86/kernel/traps.c:267
 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:warn_bad_map.isra.6.part.7+0x70/0xa0 net/mptcp/subflow.c:555
Code: 0e 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 13 89 ee 48 c7 c7 80 d0 4c 88 e8 fc d7 16 fa <0f> 0b 48 83 c4 08 5b 5d c3 48 89 df 89 0c 24 e8 3c da 75 fa 8b 0c
RSP: 0018:ffffc9000753f0d0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888096cbf23c RCX: 0000000000000006
RDX: 1ffffffff11a8cf4 RSI: 0000000000000008 RDI: 0000000000000282
RBP: 00000000002779cc R08: fffffbfff16abd4d R09: fffffbfff16abd4d
R10: ffffffff8b55ea67 R11: fffffbfff16abd4c R12: ffff888096cbf200
R13: ffff8880916d6360 R14: ffff888096cbf23c R15: ffff888096cbf244
 warn_bad_map net/mptcp/subflow.c:587 [inline]
 validate_mapping net/mptcp/subflow.c:587 [inline]
 get_mapping_status net/mptcp/subflow.c:700 [inline]
 subflow_check_data_avail net/mptcp/subflow.c:738 [inline]
 mptcp_subflow_data_available+0x10ea/0x1e70 net/mptcp/subflow.c:834
 subflow_data_ready+0xdd/0x130 net/mptcp/subflow.c:857
 tcp_data_queue+0xcc9/0x3c70 net/ipv4/tcp_input.c:4833
 tcp_rcv_established+0x9f1/0x1f40 net/ipv4/tcp_input.c:5727
 tcp_v4_do_rcv+0x517/0x790 net/ipv4/tcp_ipv4.c:1621
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __release_sock+0x116/0x350 net/core/sock.c:2459
 release_sock+0x4a/0x170 net/core/sock.c:2975
 sk_stream_wait_memory+0x4a8/0xc10 net/core/stream.c:145
 do_tcp_sendpages+0x6c9/0x1d70 net/ipv4/tcp.c:1068
 mptcp_sendmsg_frag+0xf71/0x1ae0 net/mptcp/protocol.c:592
 mptcp_sendmsg+0x3f3/0xa10 net/mptcp/protocol.c:763
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xac/0xe0 net/socket.c:672
 sock_write_iter+0x218/0x380 net/socket.c:1004
 call_write_iter include/linux/fs.h:1907 [inline]
 do_iter_readv_writev+0x4f1/0x7c0 fs/read_write.c:694
 do_iter_write+0x129/0x540 fs/read_write.c:999
 vfs_writev+0x16d/0x2d0 fs/read_write.c:1072
 do_writev+0x214/0x280 fs/read_write.c:1115
 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
Code: 0d b7 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fac9e637c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000050d640 RCX: 000000000045ca29
RDX: 0000000000000001 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000d20 R14: 00000000004cb469 R15: 00007fac9e6386d4
Kernel Offset: disabled
Rebooting in 86400 seconds..