Subject: [Bug 205283] BUG: KASAN: global-out-of-bounds in _copy_to_iter+0x3d4/0x5a8

From: [email-masked]
Date: Fri, 20 Dec 2019 20:50:27 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=205283

--- Comment #7 from Erhard F. ([email-masked]) ---
(In reply to Christophe Leroy from comment #4)
> Can you apply https://patchwork.ozlabs.org/patch/1213028/ and select
> CONFIG_KASAN_VMALLOC
Re-tried with 5.5-rc2 your KASAN_VMALLOC patch and this patch
(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7de7de7ca0ae0fc70515ee3154af33af75edae2c)
to make -rc2 boot again.

Result with KASAN is the same as before. If I enable CONFIG_KASAN_VMALLOC
additionally the KASAN hit is gone. modprobing and removing btrfs shows no
error then. Interesting!

Double-checked it just to be sure.

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