diff options
Diffstat (limited to 'Utilities/cmliblzma/liblzma/simple/simple_coder.c')
| -rw-r--r-- | Utilities/cmliblzma/liblzma/simple/simple_coder.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Utilities/cmliblzma/liblzma/simple/simple_coder.c b/Utilities/cmliblzma/liblzma/simple/simple_coder.c index 13ebabc76d..4f499befe9 100644 --- a/Utilities/cmliblzma/liblzma/simple/simple_coder.c +++ b/Utilities/cmliblzma/liblzma/simple/simple_coder.c @@ -118,7 +118,15 @@ simple_code(void *coder_ptr, const lzma_allocator *allocator, // coder->pos and coder->size yet. This way the coder can be // restarted if the next filter in the chain returns e.g. // LZMA_MEM_ERROR. - memcpy(out + *out_pos, coder->buffer + coder->pos, buf_avail); + // + // Do the memcpy() conditionally because out can be NULL + // (in which case buf_avail is always 0). Calling memcpy() + // with a null-pointer is undefined even if the third + // argument is 0. + if (buf_avail > 0) + memcpy(out + *out_pos, coder->buffer + coder->pos, + buf_avail); + *out_pos += buf_avail; // Copy/Encode/Decode more data to out[]. |