linux-kernel - Re: [syzbot] [mm?] general protection fault in __hugetlb_zap

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Date: Tue, 09 Jan 2024 10:17:07 -0800
From: syzbot <syzbot+ec9435c038e451be48ff@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, eadavis@...com, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, lizhi.xu@...driver.com, llvm@...ts.linux.dev, 
	mike.kravetz@...cle.com, muchun.song@...ux.dev, nathan@...nel.org, 
	ndesaulniers@...gle.com, riel@...riel.com, syzkaller-bugs@...glegroups.com, 
	trix@...hat.com
Subject: Re: [syzbot] [mm?] general protection fault in __hugetlb_zap_begin

syzbot suspects this issue was fixed by commit:

commit 187da0f8250aa94bd96266096aef6f694e0b4cd2
Author: Mike Kravetz <mike.kravetz@...cle.com>
Date:   Tue Nov 14 01:20:33 2023 +0000

    hugetlb: fix null-ptr-deref in hugetlb_vma_lock_write

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17f5054de80000
start commit:   9b6de136b5f0 Merge tag 'loongarch-fixes-6.7-1' of git://gi..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=52c9552def2a0fdd
dashboard link: https://syzkaller.appspot.com/bug?extid=ec9435c038e451be48ff
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=150a257ce80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13481ff0e80000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: hugetlb: fix null-ptr-deref in hugetlb_vma_lock_write

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