Messages in this thread | | | Date | Mon, 22 Jun 2020 15:57:21 -0700 | From | Kees Cook <> | Subject | Re: [PATCH v2 1/3] vmlinux.lds.h: Add .gnu.version* to DISCARDS |
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On Mon, Jun 22, 2020 at 03:52:37PM -0700, Fangrui Song wrote: > > And it's not in the output: > > > > $ readelf -Vs arch/x86/boot/compressed/vmlinux | grep version > > No version information found in this file. > > > > So... for the kernel we need to silence it right now. > > Re-link with -M (or -Map file) to check where .gnu.version{,_d,_r} input > sections come from?
It's not reporting it correctly:
.gnu.version_d 0x00000000008966b0 0x0 .gnu.version_d 0x00000000008966b0 0x0 arch/x86/boot/compressed/kernel_info.o
.gnu.version 0x00000000008966b0 0x0 .gnu.version 0x00000000008966b0 0x0 arch/x86/boot/compressed/kernel_info.o
.gnu.version_r 0x00000000008966b0 0x0 .gnu.version_r 0x00000000008966b0 0x0 arch/x86/boot/compressed/kernel_info.o
it just reports whatever file is listed on the link command line first.
> If it is a bug, we should probably figure out which version of binutils > has fixed the bug.
I see this with binutils 2.34...
-- Kees Cook
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