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

commit 751ad98d5f881df91ba47e013b82422912381e8e
Author: Marco Elver <>
Date: Fri Jul 12 03:54:00 2019 +0000

asm-generic, x86: add bitops instrumentation for KASAN

bisection log:
start commit: 244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree: upstream
final crash:
console output:
kernel config:
dashboard link:
syz repro:

Fixes: 751ad98d5f88 ("asm-generic, x86: add bitops instrumentation for KASAN")

For information about bisection process see:

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