gzip: fix wrong usage of address when calculating available size

flb_gzip_compress() calculate strm.avail_out while compressing the buffer. However, it wrongly uses `out_data` which is argument to this function and likely to be an address of local variable in stack. This should be `out_buf` which is the start address and to which `pb` belongs to. Signed-off-by: Lee Byeoksan <[email protected]>
fluent · Mar 19, 2020 · 86522cc · 86522cc
1 parent 9b13465
commit 86522cc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/flb_gzip.c b/src/flb_gzip.c
@@ -92,7 +92,7 @@ int flb_gzip_compress(void *in_data, size_t in_len,
  flush = Z_NO_FLUSH;
  while (1) {
  strm.next_out = pb + strm.total_out;
- strm.avail_out = out_size - (pb - (uint8_t *) out_data);
+ strm.avail_out = out_size - (pb - (uint8_t *) out_buf);
 
  if (strm.avail_in == 0) {
  flush = Z_FINISH;