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SubjectRe: KASAN: slab-out-of-bounds Read in vcs_scr_readw
syzbot suspects this bug was fixed by commit:

commit 0c9acb1af77a3cb8707e43f45b72c95266903cee
Author: Nicolas Pitre <>
Date: Tue Nov 5 09:33:16 2019 +0000

vcs: prevent write access to vcsu devices

bisection log:
start commit: 76bb8b05 Merge tag 'kbuild-v5.5' of git://
git tree: upstream
kernel config:
dashboard link:
syz repro:
C reproducer:

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

#syz fix: vcs: prevent write access to vcsu devices

For information about bisection process see:

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