Subject: [Bug 205099] KASAN hit at raid6_pq: BUG: Unable to handle kernel data access at 0x00f0fd0d

From: [email-masked]
Date: Sat, 21 Dec 2019 17:42:41 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=205099

--- Comment #9 from Erhard F. ([email-masked]) ---
Created attachment 286395
  --> https://bugzilla.kernel.org/attachment.cgi?id=286395&action=edit
dmesg (kernel 5.5-rc2+, KASAN_VMALLOC + INLINE KASAN, PowerMac G4 DP)

(In reply to Christophe Leroy from comment #10, bug #205283)
> So it must be something more. By the way, now that KASAN_VMALLOC exists and
> handle module loading better, I think we should analyse the impact of
> activating KASAN_VMALLOC at all time.
> 
> Regarding #205099, I believe there's a real stack related bug in raid6_pq
> that needs to be identified. Did you try with INLINE KASAN ?
With INLINE KASAN and KASAN_VMALLOC this hit does not show up at all.

It does show up with OUTLINE KASAN and KASAN_VMALLOC.

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