linux-kernel - Re: [syzbot] [kvm?] KASAN: slab-use-after-free Write in kvm_gmem

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Message-ID: <68fb1966.050a0220.346f24.0093.GAE@google.com>
Date: Thu, 23 Oct 2025 23:15:02 -0700
From: syzbot <syzbot+2479e53d0db9b32ae2aa@...kaller.appspotmail.com>
To: david@...hat.com, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	pbonzini@...hat.com, seanjc@...gle.com, syzkaller-bugs@...glegroups.com, 
	tabba@...gle.com, xiaoyao.li@...el.com
Subject: Re: [syzbot] [kvm?] KASAN: slab-use-after-free Write in kvm_gmem_release

syzbot has bisected this issue to:

commit d1e54dd08f163a9021433020d16a8f8f70ddc41c
Author: Fuad Tabba <tabba@...gle.com>
Date:   Tue Jul 29 22:54:40 2025 +0000

    KVM: x86: Enable KVM_GUEST_MEMFD for all 64-bit builds

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12a663cd980000
start commit:   43e9ad0c55a3 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11a663cd980000
console output: https://syzkaller.appspot.com/x/log.txt?x=16a663cd980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=67b63a24f3c26fca
dashboard link: https://syzkaller.appspot.com/bug?extid=2479e53d0db9b32ae2aa
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=173ecd2f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14bc2be2580000

Reported-by: syzbot+2479e53d0db9b32ae2aa@...kaller.appspotmail.com
Fixes: d1e54dd08f16 ("KVM: x86: Enable KVM_GUEST_MEMFD for all 64-bit builds")

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