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When processing the relocation table, the offset used to calculate the relocation is an 'int'. This is sufficient for calculating the physical address of the relocs entry on 32-bit systems and on 64-bit systems when the relocation is under 2G. To handle relocations above 2G (seen in situations like kexec, netboot, etc), this offset needs to be calculated using a 'long' to avoid wrapping and miscalculating the relocation. Signed-off-by: Baoquan He <bhe@redhat.com> [ 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: 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: Yinghai Lu <yinghai@kernel.org> Cc: lasse.collin@tukaani.org Link: http://lkml.kernel.org/r/1461888548-32439-2-git-send-email-keescook@chromium.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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