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SubjectRe: [PATCH] x86: livepatch: Treat R_X86_64_PLT32 as R_X86_64_PC32

This patch should be merged into 4.4 stable,

which still use klp_write_module_reloc.

ZeFeng may have sent a stable(4.4-y) patch to the wrong mail-list(mainline).


On 2019/2/15 15:28, Jiri Kosina wrote:
> On Fri, 15 Feb 2019, chenzefeng (A) wrote:
>> On x86-64, for 32-bit PC-relacive branches, we can generate PLT32
>> relocation, instead of PC32 relocation. and R_X86_64_PLT32 can be
>> treated the same as R_X86_64_PC32 since linux kernel doesn't use PLT.
>> In linux 4.4 commit b21ebf2fb4cd ("x86: Treat R_X86_64_PLT32 as
>> R_X86_64_PC32") been fixed for the module loading, but not fixed for
>> livepatch relocation, which will fail to load livepatch with the error
>> message as follow: relocation failed for symbol <symbol name> at <symbol
>> address>
>> Signed-off-by: chenzefeng <>
> What kernel version is this patch based on? We've got rid of x86-specific
> module loading stub and offloaded all the relocation handling to generic
> kmod loader long time ago.

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