linux-kernel - Re: [syzbot] [block?] general protection fault in zcomp_stream

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Message-ID: <7ousgnpwrsdzbpp7svqzkkvse752pz5djhfl4zxyf2kwwyvoyt@axtbbqp6vnvu>
Date: Sat, 15 Nov 2025 11:37:26 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: syzbot <syzbot+16a8410141ca18c0d963@...kaller.appspotmail.com>
Cc: axboe@...nel.dk, linux-block@...r.kernel.org, 
	linux-kernel@...r.kernel.org, minchan@...nel.org, senozhatsky@...omium.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [block?] general protection fault in zcomp_stream_get

On (25/11/14 17:36), syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    7a0892d2836e Merge tag 'pci-v6.18-fixes-5' of git://git.ke..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12152914580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=19d831c6d0386a9c
> dashboard link: https://syzkaller.appspot.com/bug?extid=16a8410141ca18c0d963
> compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> 
> Unfortunately, I don't have any reproducer for this issue yet.

This will be difficult to understand w/o a reproducer.
I'll try to look at it, but it doesn't make a lot of sense
to me right now: raw_cpu_ptr(comp->stream) should work.