linux-kernel - Re: [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in change_page_attr_set

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Message-ID: <68f5fdd2.050a0220.1be48.000a.GAE@google.com>
Date: Mon, 20 Oct 2025 02:16:02 -0700
From: syzbot <syzbot+e34177f6091df113ef20@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, bp@...en8.de, chandna.linuxkernel@...il.com, 
	dave.hansen@...ux.intel.com, hpa@...or.com, kas@...nel.org, 
	kevin.brodsky@....com, linux-kernel@...r.kernel.org, luto@...nel.org, 
	mingo@...hat.com, nooraineqbal@...il.com, peterz@...radead.org, 
	riel@...riel.com, rppt@...nel.org, syzkaller-bugs@...glegroups.com, 
	tglx@...utronix.de, x86@...nel.org, yu-cheng.yu@...el.com
Subject: Re: [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in change_page_attr_set_clr

syzbot has bisected this issue to:

commit 86e6815b316ec0ea8c4bb3c16a033219a52b6060
Author: Yu-cheng Yu <yu-cheng.yu@...el.com>
Date:   Fri Jun 6 17:10:35 2025 +0000

    x86/mm: Change cpa_flush() to call flush_kernel_range() directly

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12bb8d42580000
start commit:   f406055cb18c Merge tag 'arm64-fixes' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11bb8d42580000
console output: https://syzkaller.appspot.com/x/log.txt?x=16bb8d42580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=af9170887d81dea1
dashboard link: https://syzkaller.appspot.com/bug?extid=e34177f6091df113ef20
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=173dda14580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=126ab52f980000

Reported-by: syzbot+e34177f6091df113ef20@...kaller.appspotmail.com
Fixes: 86e6815b316e ("x86/mm: Change cpa_flush() to call flush_kernel_range() directly")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection