Patch "arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE" has been added to the 4.7-stable tree

This is a note to let you know that I've just added the patch titled

arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE

to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arm64-vmlinux.lds-make-__rela_offset-and-__dynsym_offset-absolute.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ard Biesheuvel <[email protected]>
Date: Thu, 28 Jul 2016 16:15:14 +0200
Subject: arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE

From: Ard Biesheuvel <[email protected]>

commit d6732fc402c2665f61e72faf206a0268e65236e9 upstream.

Due to the untyped KIMAGE_VADDR constant, the linker may not notice that the __rela_offset and __dynsym_offset expressions are absolute values (i.e., are not subject to relocation). This does not matter for KASLR, but it does confuse kallsyms in relative mode, since it uses the lowest non-absolute symbol address as the anchor point, and expects all other symbol addresses to be within 4 GB of it.

Fix this by qualifying these expressions as ABSOLUTE() explicitly.

---
 arch/arm64/kernel/vmlinux.lds.S |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -181,9 +181,9 @@ SECTIONS
 		*(.hash)
 	}
 
-	__rela_offset	= ADDR(.rela) - KIMAGE_VADDR;
+	__rela_offset	= ABSOLUTE(ADDR(.rela) - KIMAGE_VADDR);
 	__rela_size	= SIZEOF(.rela);
-	__dynsym_offset	= ADDR(.dynsym) - KIMAGE_VADDR;
+	__dynsym_offset	= ABSOLUTE(ADDR(.dynsym) - KIMAGE_VADDR);
 
 	. = ALIGN(SEGMENT_ALIGN);
 	__init_end = .;

Patches currently in stable-queue which might be from [email protected] are

queue-4.7/arm64-only-select-arm64_module_plts-if-modules-y.patch queue-4.7/arm64-vmlinux.lds-make-__rela_offset-and-__dynsym_offset-absolute.patch queue-4.7/arm64-mm-avoid-fdt_check_header-before-the-fdt-is-fully-mapped.patch