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Add more sanity checks to lzma_stream_buffer_decode().

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This commit is contained in:
Lasse Collin 2009-01-26 14:33:28 +02:00
parent c129748675
commit 5fb34d8324
1 changed files with 7 additions and 0 deletions
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7
src/liblzma/common/stream_buffer_decoder.c
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@ -26,6 +26,13 @@ lzma_stream_buffer_decode(uint64_t *memlimit, uint32_t flags,
const uint8_t *in, size_t *in_pos, size_t in_size, const uint8_t *in, size_t *in_pos, size_t in_size,
uint8_t *out, size_t *out_pos, size_t out_size) uint8_t *out, size_t *out_pos, size_t out_size)
{ {
// Sanity checks
if (in_pos == NULL || (in == NULL && *in_pos != in_size)
|| *in_pos > in_size || out_pos == NULL
|| (out == NULL && *out_pos != out_size)
|| *out_pos > out_size)
return LZMA_PROG_ERROR;
// Catch flags that are not allowed in buffer-to-buffer decoding. // Catch flags that are not allowed in buffer-to-buffer decoding.
if (flags & LZMA_TELL_ANY_CHECK) if (flags & LZMA_TELL_ANY_CHECK)
return LZMA_PROG_ERROR; return LZMA_PROG_ERROR;