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SubjectRe: KASAN: slab-out-of-bounds Read in bitmap_ip_add
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syzbot has bisected this bug to:

commit 751ad98d5f881df91ba47e013b82422912381e8e
Author: Marco Elver <elver@google.com>
Date: Fri Jul 12 03:54:00 2019 +0000

asm-generic, x86: add bitops instrumentation for KASAN

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1287db66e00000
start commit: 244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=1187db66e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1687db66e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1104c495e00000

Reported-by: syzbot+f3e96783d74ee8ea9aa3@syzkaller.appspotmail.com
Fixes: 751ad98d5f88 ("asm-generic, x86: add bitops instrumentation for KASAN")

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

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