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linux-stable/arch/x86/boot/compressed
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Yinghai Lu 4abf061bf8 x86/boot: Correctly bounds-check relocations 
Relocation handling performs bounds checking on the resulting calculated
addresses. The existing code uses output_len (VO size plus relocs size) as
the max address. This is not right since the max_addr check should stop at
the end of VO and exclude bss, brk, etc, which follows.  The valid range
should be VO [_text, __bss_start] in the loaded physical address space.

This patch adds an export for __bss_start in voffset.h and uses it to
set the correct limit for max_addr.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
[ Rewrote the changelog. ]
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: lasse.collin@tukaani.org
Link: http://lkml.kernel.org/r/1461888548-32439-7-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-29 11:03:30 +02:00
..
.gitignore
cmdline.c x86/boot: Rename "real_mode" to "boot_params" 2016-04-19 10:30:50 +02:00
cpuflags.c x86, boot: Rename get_flags() and check_flags() to *_cpuflags() 2013-10-13 04:08:56 -07:00
early_serial_console.c x86, boot: Don't compile early_serial_console.c when !CONFIG_EARLY_PRINTK 2014-08-17 14:58:24 -07:00
eboot.c * Make the EFI System Resource Table (ESRT) driver explicitly 2015-10-14 16:51:34 +02:00
eboot.h efi/x86: Move x86 back to libstub 2014-11-11 22:23:11 +00:00
efi_stub_32.S x86, efi: EFI boot stub support 2011-12-12 14:26:10 -08:00
efi_stub_64.S x86/efi: Avoid triple faults during EFI mixed mode calls 2015-02-13 15:42:56 +00:00
efi_thunk_64.S x86/efi: Avoid triple faults during EFI mixed mode calls 2015-02-13 15:42:56 +00:00
head_32.S x86/KASLR: Clean up unused code from old 'run_size' and rename it to 'kernel_total_size' 2016-04-29 11:03:30 +02:00
head_64.S x86/KASLR: Clean up unused code from old 'run_size' and rename it to 'kernel_total_size' 2016-04-29 11:03:30 +02:00
kaslr.c x86/KASLR: Warn when KASLR is disabled 2016-04-22 10:00:51 +02:00
Makefile x86/boot: Correctly bounds-check relocations 2016-04-29 11:03:30 +02:00
misc.c x86/boot: Correctly bounds-check relocations 2016-04-29 11:03:30 +02:00
misc.h x86/KASLR: Warn when KASLR is disabled 2016-04-22 10:00:51 +02:00
mkpiggy.c x86/KASLR: Clean up unused code from old 'run_size' and rename it to 'kernel_total_size' 2016-04-29 11:03:30 +02:00
string.c x86/boot: Rename overlapping memcpy() to memmove() 2016-04-28 11:02:29 +02:00
vmlinux.lds.S x86/boot: Move compressed kernel to the end of the decompression buffer 2016-04-29 11:03:29 +02:00