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From: bugzilla-daemon@kernel.org
To: linuxppc-dev@lists.ozlabs.org
Subject: [Bug 216190] 5.19-rc4 kernel + KASAN fails to boot at very early stage when CONFIG_SMP=y is selected (PowerMac G4 3,6)
Date: Sun, 03 Jul 2022 21:24:39 +0000	[thread overview]
Message-ID: <bug-216190-206035-JVZ7ym8CZG@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-216190-206035@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=216190

--- Comment #3 from Erhard F. (erhard_f@mailbox.org) ---
(In reply to Christophe Leroy from comment #2)
> Problem is likely due to commit 4291d085b0b0 ("powerpc/32s: Make
> pte_update() non atomic on 603 core")
> 
> kasan_early_init() calls __set_pte_at(), which calls pte_update() if
> CONFIG_SMP, and pte_update() calls mmu_has_feature() since above commit, but
> that's too early for calling mmu_has_feature() so mmu_has_feature() tries to
> warn using printk(), but that cannot work because the KASAN shadow is not
> set.
> 
> Can you try with the change below ?
Applied your patch on top of 5.19-rc4 and can confirm it works. Thanks!

I'll close here as soon it is in the -rcs.

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  parent reply	other threads:[~2022-07-03 21:25 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-29 20:04 [Bug 216190] New: 5.19-rc4 kernel + KASAN fails to boot at very early stage when CONFIG_SMP=y is selected (PowerMac G4 3,6) bugzilla-daemon
2022-06-29 20:05 ` [Bug 216190] " bugzilla-daemon
2022-06-30 18:38 ` bugzilla-daemon
2022-07-03 21:24 ` bugzilla-daemon [this message]
2022-08-19 10:17 ` bugzilla-daemon

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