mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-24 20:13:39 +00:00
6dfed163bd
Add call to lzo's lzo1x_decompress_safe() into sqfs_decompress(). U-Boot's LZO sources may still have some unsolved issues that could make the decompression crash when dealing with fragmented files, so those should be avoided. The "-no-fragments" option can be passed to mksquashfs. Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
155 lines
3.1 KiB
C
155 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2020 Bootlin
|
|
*
|
|
* Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#if IS_ENABLED(CONFIG_LZO)
|
|
#include <linux/lzo.h>
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_ZLIB)
|
|
#include <u-boot/zlib.h>
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_ZSTD)
|
|
#include <linux/zstd.h>
|
|
#endif
|
|
|
|
#include "sqfs_decompressor.h"
|
|
#include "sqfs_utils.h"
|
|
|
|
int sqfs_decompressor_init(struct squashfs_ctxt *ctxt)
|
|
{
|
|
u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
|
|
|
|
switch (comp_type) {
|
|
#if IS_ENABLED(CONFIG_LZO)
|
|
case SQFS_COMP_LZO:
|
|
break;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZLIB)
|
|
case SQFS_COMP_ZLIB:
|
|
break;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZSTD)
|
|
case SQFS_COMP_ZSTD:
|
|
ctxt->zstd_workspace = malloc(ZSTD_DCtxWorkspaceBound());
|
|
if (!ctxt->zstd_workspace)
|
|
return -ENOMEM;
|
|
break;
|
|
#endif
|
|
default:
|
|
printf("Error: unknown compression type.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt)
|
|
{
|
|
u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
|
|
|
|
switch (comp_type) {
|
|
#if IS_ENABLED(CONFIG_LZO)
|
|
case SQFS_COMP_LZO:
|
|
break;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZLIB)
|
|
case SQFS_COMP_ZLIB:
|
|
break;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZSTD)
|
|
case SQFS_COMP_ZSTD:
|
|
free(ctxt->zstd_workspace);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_ZLIB)
|
|
static void zlib_decompression_status(int ret)
|
|
{
|
|
switch (ret) {
|
|
case Z_BUF_ERROR:
|
|
printf("Error: 'dest' buffer is not large enough.\n");
|
|
break;
|
|
case Z_DATA_ERROR:
|
|
printf("Error: corrupted compressed data.\n");
|
|
break;
|
|
case Z_MEM_ERROR:
|
|
printf("Error: insufficient memory.\n");
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_ZSTD)
|
|
static int sqfs_zstd_decompress(struct squashfs_ctxt *ctxt, void *dest,
|
|
unsigned long dest_len, void *source, u32 src_len)
|
|
{
|
|
ZSTD_DCtx *ctx;
|
|
size_t wsize;
|
|
int ret;
|
|
|
|
wsize = ZSTD_DCtxWorkspaceBound();
|
|
ctx = ZSTD_initDCtx(ctxt->zstd_workspace, wsize);
|
|
ret = ZSTD_decompressDCtx(ctx, dest, dest_len, source, src_len);
|
|
|
|
return ZSTD_isError(ret);
|
|
}
|
|
#endif /* CONFIG_ZSTD */
|
|
|
|
int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
|
|
unsigned long *dest_len, void *source, u32 src_len)
|
|
{
|
|
u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
|
|
int ret = 0;
|
|
|
|
switch (comp_type) {
|
|
#if IS_ENABLED(CONFIG_LZO)
|
|
case SQFS_COMP_LZO: {
|
|
size_t lzo_dest_len = *dest_len;
|
|
ret = lzo1x_decompress_safe(source, src_len, dest, &lzo_dest_len);
|
|
if (ret) {
|
|
printf("LZO decompression failed. Error code: %d\n", ret);
|
|
return -EINVAL;
|
|
}
|
|
|
|
break;
|
|
}
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZLIB)
|
|
case SQFS_COMP_ZLIB:
|
|
ret = uncompress(dest, dest_len, source, src_len);
|
|
if (ret) {
|
|
zlib_decompression_status(ret);
|
|
return -EINVAL;
|
|
}
|
|
|
|
break;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_ZSTD)
|
|
case SQFS_COMP_ZSTD:
|
|
ret = sqfs_zstd_decompress(ctxt, dest, *dest_len, source, src_len);
|
|
if (ret) {
|
|
printf("ZSTD Error code: %d\n", ZSTD_getErrorCode(ret));
|
|
return -EINVAL;
|
|
}
|
|
|
|
break;
|
|
#endif
|
|
default:
|
|
printf("Error: unknown compression type.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|