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Fix buffer over-read in port encoding scan.

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* libguile/read.c (scm_i_scan_for_encoding): Add a NULL terminator to the
  end of header to prevent over-read by subsequent call to strstr.
This commit is contained in:
Julian Graham 2010-11-12 08:45:09 -05:00
parent 16f0612864
commit f25e1b6713
1 changed files with 1 additions and 0 deletions
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libguile/read.c
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@ -1646,6 +1646,7 @@ scm_i_scan_for_encoding (SCM port)
return NULL; return NULL;
bytes_read = scm_c_read (port, header, SCM_ENCODING_SEARCH_SIZE); bytes_read = scm_c_read (port, header, SCM_ENCODING_SEARCH_SIZE);
header[bytes_read] = NULL;
scm_seek (port, scm_from_int (0), scm_from_int (SEEK_SET)); scm_seek (port, scm_from_int (0), scm_from_int (SEEK_SET));