Messages in this thread | | | Subject | Re: [PATCH stable 4.9] powerpc/lib: fix book3s/32 boot failure due to code patching | From | Christophe Leroy <> | Date | Wed, 15 May 2019 14:35:36 +0200 |
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Le 15/05/2019 à 10:29, Greg KH a écrit : > On Wed, May 15, 2019 at 06:40:47AM +0000, Christophe Leroy wrote: >> [Backport of upstream commit b45ba4a51cde29b2939365ef0c07ad34c8321789] >> >> On powerpc32, patch_instruction() is called by apply_feature_fixups() >> which is called from early_init() >> >> There is the following note in front of early_init(): >> * Note that the kernel may be running at an address which is different >> * from the address that it was linked at, so we must use RELOC/PTRRELOC >> * to access static data (including strings). -- paulus >> >> Therefore init_mem_is_free must be accessed with PTRRELOC() >> >> Fixes: 1c38a84d4586 ("powerpc: Avoid code patching freed init sections") >> Link: https://bugzilla.kernel.org/show_bug.cgi?id=203597 >> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> >> >> --- >> Can't apply the upstream commit as such due to several other unrelated stuff >> like for instance STRICT_KERNEL_RWX which are missing. >> So instead, using same approach as for commit 252eb55816a6f69ef9464cad303cdb3326cdc61d > > Now queued up, thanks. >
Should go to 4.4 as well since the commit it fixes is now queued for 4.4 ([PATCH 4.4 056/266] powerpc: Avoid code patching freed init sections)
Christophe
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