From bd78783254a7126d82eab26a2069b3a457b98e2e Mon Sep 17 00:00:00 2001 From: Hongxu Jia Date: Tue, 15 Aug 2017 17:13:59 +0800 Subject: [PATCH] Fix elf_cvt_gunhash if dest and src are same. Upstream-Status: Pending The 'dest' and 'src' can be same, we need to save the value of src32[2] before swaping it. Signed-off-by: Baoshan Pang Rebase to 0.170 Signed-off-by: Hongxu Jia --- libelf/gnuhash_xlate.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libelf/gnuhash_xlate.h b/libelf/gnuhash_xlate.h index 3a00ae0..40468fc 100644 --- a/libelf/gnuhash_xlate.h +++ b/libelf/gnuhash_xlate.h @@ -42,6 +42,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode) words. We must detangle them here. */ Elf32_Word *dest32 = dest; const Elf32_Word *src32 = src; + Elf32_Word save_src32_2 = src32[2]; // dest could be equal to src /* First four control words, 32 bits. */ for (unsigned int cnt = 0; cnt < 4; ++cnt) @@ -52,7 +53,7 @@ elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode) len -= 4; } - Elf32_Word bitmask_words = encode ? src32[2] : dest32[2]; + Elf32_Word bitmask_words = encode ? save_src32_2 : dest32[2]; /* Now the 64 bit words. */ Elf64_Xword *dest64 = (Elf64_Xword *) &dest32[4];