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https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
5a7d7e05b8
Make sure that the kernel command line used for the Secure Execution
boot image is always null-terminated. Before this change, users had to
ensure that the provided kernel cmdline was null-terminated, which was
error-prone. But since the default s390x Linux kernel command line is
set to `root=/dev/ram0 ro` the remaining reserved memory for the kernel
command line is zeroed out. Therefore, the problem only shows up if the
used kernel command line is shorter than the default kernel command
line.
Fixes: 65b9fc442c ("genprotimg: introduce new tool for the creation of PV images")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
79 lines
1.3 KiB
C
79 lines
1.3 KiB
C
/*
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* Buffer functions
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*
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* Copyright IBM Corp. 2020
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <errno.h>
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#include <glib.h>
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#include <stdio.h>
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#include <string.h>
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#include "align.h"
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#include "buffer.h"
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#include "common.h"
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#include "file_utils.h"
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PvBuffer *pv_buffer_alloc(gsize size)
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{
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PvBuffer *ret = g_new0(PvBuffer, 1);
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ret->data = g_malloc0(size);
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ret->size = size;
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return ret;
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}
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PvBuffer *pv_buffer_take(char *data, gsize size)
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{
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PvBuffer *ret = g_new0(PvBuffer, 1);
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ret->data = data;
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ret->size = size;
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return ret;
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}
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PvBuffer *pv_buffer_dup(const PvBuffer *buf, gboolean page_aligned)
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{
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PvBuffer *ret;
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gsize size;
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if (!buf)
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return NULL;
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size = buf->size;
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if (page_aligned)
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size = PAGE_ALIGN(size);
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ret = pv_buffer_alloc(size);
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/* content will be 0-right-padded */
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memcpy(ret->data, buf->data, buf->size);
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return ret;
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}
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gint pv_buffer_write(const PvBuffer *buf, FILE *file, GError **err)
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{
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return file_write(file, buf->data, buf->size, 1, NULL, err);
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}
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void pv_buffer_free(PvBuffer *buf)
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{
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if (!buf)
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return;
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g_free(buf->data);
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g_free(buf);
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}
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void pv_buffer_clear(PvBuffer **buf)
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{
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if (!buf || !*buf)
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return;
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pv_buffer_free(*buf);
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*buf = NULL;
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}
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