Re: [syzbot] KASAN: vmalloc-out-of-bounds Write in ringbuf_map_alloc

[syzbot]

syzbot has bisected this issue to:

commit c34cdf846c1298de1c0f7fbe04820fe96c45068c
Author: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Date:   Wed Feb 2 01:04:27 2022 +0000

    kasan, vmalloc: unpoison VM_ALLOC pages after mapping

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=128cb900700000
start commit:   6abab1b81b65 Add linux-next specific files for 20220202
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=118cb900700000
console output: https://syzkaller.appspot.com/x/log.txt?x=168cb900700000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b8d8750556896349
dashboard link: https://syzkaller.appspot.com/bug?extid=5ad567a418794b9b5983
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1450d9f0700000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=130ef35bb00000

Reported-by: syzbot+5ad567a418794b9b5983@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: c34cdf846c12 ("kasan, vmalloc: unpoison VM_ALLOC pages after mapping")

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