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Re: general protection fault in xsk_recvmsg

To: syzbot <syzbot+b974d32294d1dffbea36@xxxxxxxxxxxxxxxxxxxxxxxxx>, andrii@xxxxxxxxxx, ast@xxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, daniel@xxxxxxxxxxxxx, davem@xxxxxxxxxxxxx, hawk@xxxxxxxxxx, johannes.berg@xxxxxxxxx, johannes@xxxxxxxxxxxxxxxx, john.fastabend@xxxxxxxxx, jonathan.lemon@xxxxxxxxx, kafai@xxxxxx, kpsingh@xxxxxxxxxxxx, kuba@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-wireless@xxxxxxxxxxxxxxx, magnus.karlsson@xxxxxxxxx, netdev@xxxxxxxxxxxxxxx, songliubraving@xxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx, yhs@xxxxxx
Subject: Re: general protection fault in xsk_recvmsg
From: Björn Töpel <bjorn.topel@xxxxxxxxx>
Date: Fri, 15 Jan 2021 13:49:53 +0100
In-reply-to: <000000000000ee881505b8e27cf2@google.com>
References: <000000000000ee881505b8e27cf2@google.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0

#syz fix: xsk: Validate socket state in xsk_recvmsg, prior touchingsocket members

References:
- general protection fault in xsk_recvmsg
  - From: syzbot