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Pointer arithmatic results in implementation defined signed integer type, so that 'd - dst’ in strlcat may trigger signed overflow if pointer ‘d’ is near 0x7fffffff in 32 bits system. In case of ompilation by gcc or clang with -ftrapv option, the overflow would generate program abort. (From OE-Core rev: 1c4b8d797c76a08ebd1658066e9d32972b6abe58) Signed-off-by: hguo3 <heng.guo@windriver.com> Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>