3.2.52-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Chen Gang <[email protected]> commit 5676005acf26ab7e924a8438ea4746e47d405762 upstream. need set '\0' for 'local_buffer'. SPLPAR_MAXLENGTH is 1026, RTAS_DATA_BUF_SIZE is 4096. so the contents of rtas_data_buf may truncated in memcpy. if contents are really truncated. the splpar_strlen is more than 1026. the next while loop checking will not find the end of buffer. that will cause memory access violation. Signed-off-by: Chen Gang <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> --- arch/powerpc/kernel/lparcfg.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/powerpc/kernel/lparcfg.c +++ b/arch/powerpc/kernel/lparcfg.c @@ -375,6 +375,7 @@ static void parse_system_parameter_strin __pa(rtas_data_buf), RTAS_DATA_BUF_SIZE); memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); + local_buffer[SPLPAR_MAXLENGTH - 1] = '\0'; spin_unlock(&rtas_data_buf_lock); if (call_status != 0) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
