linux-kernel - Re: KASAN: out-of-bounds Read in __switch

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Date:   Thu, 29 Oct 2020 07:10:08 -0700
From:   syzbot <syzbot+2667188e965125ab6e7a@...kaller.appspotmail.com>
To:     0x7f454c46@...il.com, anant.thazhemadam@...il.com,
        b.zolnierkie@...sung.com, bp@...en8.de, chang.seok.bae@...el.com,
        dan.carpenter@...cle.com, george.kennedy@...cle.com, hpa@...or.com,
        linux-kernel@...r.kernel.org, luto@...nel.org, mingo@...hat.com,
        sashal@...nel.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org
Subject: Re: KASAN: out-of-bounds Read in __switch_to (2)

syzbot suspects this issue was fixed by commit:

commit a49145acfb975d921464b84fe00279f99827d816
Author: George Kennedy <george.kennedy@...cle.com>
Date:   Tue Jul 7 19:26:03 2020 +0000

    fbmem: add margin check to fb_check_caps()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=174684b8500000
start commit:   fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs...
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=41b736b7ce1b3ea4
dashboard link: https://syzkaller.appspot.com/bug?extid=2667188e965125ab6e7a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11743a37900000

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

#syz fix: fbmem: add margin check to fb_check_caps()

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