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Date: Tue, 4 Jun 2024 11:49:09 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: syzbot <syzbot+c67d06ab25a9bc4adf35@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        maple-tree@...ts.infradead.org

maple-tree@
Bcc:
Subject: Re: [syzbot] [maple-tree?] BUG: unable to handle kernel paging
 request in mas_walk
Reply-To:
In-Reply-To: <000000000000d09b25061a11f454@...gle.com>

* syzbot <syzbot+c67d06ab25a9bc4adf35@...kaller.appspotmail.com> [240604 11:18]:
> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> BUG: unable to handle kernel paging request in corrupted
> 
> Unable to handle kernel paging request at virtual address 007f8000826099b8
> Mem abort info:
>   ESR = 0x0000000096000004
>   EC = 0x25: DABT (current EL), IL = 32 bits
>   SET = 0, FnV = 0
>   EA = 0, S1PTW = 0
>   FSC = 0x04: level 0 translation fault
> Data abort info:
>   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
>   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
>   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> [007f8000826099b8] address between user and kernel address ranges
> 
> 
> Tested on:
> 
> commit:         63ab6007 maple_tree: Check dead node in mas_walk() whe..
> git tree:       git://git.infradead.org/users/jedix/linux-maple.git syz_20240603
> console output: https://syzkaller.appspot.com/x/log.txt?x=14842a16980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=bd6024aedb15e15c
> dashboard link: https://syzkaller.appspot.com/bug?extid=c67d06ab25a9bc4adf35
> compiler:       aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> userspace arch: arm64
> 
> Note: no patches were applied.

This trace does not look to be related to the first reported issue
either.  It is difficult to test fixes when the issue is not reliably
reachable.