Messages in this thread | | | Date | Mon, 14 Jan 2013 11:50:20 -0800 | Subject | Re: [PATCH v7u1 22/31] x86, boot: add fields to support load bzImage and ramdisk above 4G | From | Yinghai Lu <> |
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On Mon, Jan 14, 2013 at 10:59 AM, H. Peter Anvin <hpa@zytor.com> wrote: > No, there were other fields that were also left uninitialized, per your > analysis from last year. I don't remember the details, but I seem to > recall they included the EFI and graphics-related fields. > > So yes, just zero them all out.
?
+static void sanitize_real_mode(struct boot_params *real_mode) +{ + if (real_mode->sentinel) { + /*fields in boot_params are not valid, clear them */ + memset(&real_mode->olpc_ofw_header, 0, + (char *)&real_mode->alt_mem_k - + (char *)&real_mode->olpc_ofw_header); + memset(&real_mode->_pad7[0], 0, + (char *)&real_mode->edd_mbr_sig_buffer[0] - + (char *)&real_mode->_pad7[0]); + memset(&real_mode->_pad8[0], 0, + (char *)&real_mode->eddbuf[0] - + (char *)&real_mode->_pad8[0]); + memset(&real_mode->_pad9[0], 0, sizeof(real_mode->_pad9)); + } +} +
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