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deflate_compress: don't pass NULL to memcpy on empty input

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This commit is contained in:
Eric Biggers 2016-10-23 13:54:52 -07:00
parent 2b047b097b
commit 0205f005bc
1 changed files with 2 additions and 0 deletions
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2
lib/deflate_compress.c
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@ -2787,6 +2787,8 @@ libdeflate_deflate_compress(struct libdeflate_compressor *c,
if (unlikely(in_nbytes < 16)) { if (unlikely(in_nbytes < 16)) {
struct deflate_output_bitstream os; struct deflate_output_bitstream os;
deflate_init_output(&os, out, out_nbytes_avail); deflate_init_output(&os, out, out_nbytes_avail);
if (in_nbytes == 0)
in = &os; /* Avoid passing NULL to memcpy() */
deflate_write_uncompressed_block(&os, in, in_nbytes, true); deflate_write_uncompressed_block(&os, in, in_nbytes, true);
return deflate_flush_output(&os); return deflate_flush_output(&os);
} }