Messages in this thread Patch in this message | | | Subject | [PATCH] MIPS: R6: memcpy bugfix - zero length overwrites memory | From | Leonid Yegoshin <> | Date | Mon, 27 Apr 2015 16:35:29 -0700 |
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MIPS R6 version of memcpy has bug - then length to copy is zero and addresses are not aligned then it can overwrite a whole memory.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> --- arch/mips/lib/memcpy.S | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S index 9245e1705e69..7e0250f3aec8 100644 --- a/arch/mips/lib/memcpy.S +++ b/arch/mips/lib/memcpy.S @@ -514,6 +514,8 @@ #ifdef CONFIG_CPU_MIPSR6 .Lcopy_unaligned_bytes\@: + beqz len, .Ldone\@ + nop 1: COPY_BYTE(0) COPY_BYTE(1)
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