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-rw-r--r--payloads/libpayload/liblzma/lzma.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/payloads/libpayload/liblzma/lzma.c b/payloads/libpayload/liblzma/lzma.c
index 767eb8683c..57a8b3a5c7 100644
--- a/payloads/libpayload/liblzma/lzma.c
+++ b/payloads/libpayload/liblzma/lzma.c
@@ -10,6 +10,7 @@
*/
#include <lzma.h>
+#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "lzmadecode.c"
@@ -25,7 +26,7 @@ unsigned long ulzman(const unsigned char *src, unsigned long srcn,
int res;
CLzmaDecoderState state;
SizeT mallocneeds;
- unsigned char scratchpad[15980];
+ unsigned char *scratchpad;
memcpy(properties, src, LZMA_PROPERTIES_SIZE);
memcpy(&outSize, src + LZMA_PROPERTIES_SIZE, sizeof(outSize));
@@ -37,13 +38,16 @@ unsigned long ulzman(const unsigned char *src, unsigned long srcn,
return 0;
}
mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
- if (mallocneeds > 15980) {
- printf("lzma: Decoder scratchpad too small!\n");
+ scratchpad = malloc(mallocneeds);
+ if (!scratchpad) {
+ printf("lzma: Cannot allocate %u bytes for scratchpad!\n",
+ mallocneeds);
return 0;
}
state.Probs = (CProb *)scratchpad;
res = LzmaDecode(&state, src + data_offset, srcn - data_offset,
&inProcessed, dst, outSize, &outProcessed);
+ free(scratchpad);
if (res != 0) {
printf("lzma: Decoding error = %d\n", res);
return 0;