[git] GCRYPT - branch, master, updated. libgcrypt-1.6.0-381-g491586b

[by Justus Winter]

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      from  47c6a1f88eb763e9baa394e34d873b761abcebbe (commit)

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- Log -----------------------------------------------------------------
commit 491586bc7f7b9edc6b78331a77e653543983c9e4
Author: Justus Winter <justus at g10code.com>
Date:   Thu Apr 14 13:53:55 2016 +0200

    src: Improve S-expression parsing.
    
    * src/sexp.c (do_vsexp_sscan): Return an error if a closing
    parenthesis is encountered with no matching opening parenthesis.
    
    Signed-off-by: Justus Winter <justus at g10code.com>

diff --git a/src/sexp.c b/src/sexp.c
index 636f922..6077bab 100644
--- a/src/sexp.c
+++ b/src/sexp.c
@@ -1592,6 +1592,13 @@ do_vsexp_sscan (gcry_sexp_t *retsexp, size_t *erroff,
 	      err = GPG_ERR_SEXP_UNMATCHED_DH;
               goto leave;
 	    }
+
+	  if (level == 0)
+	    {
+	      *erroff = p - buffer;
+	      err = GPG_ERR_SEXP_UNMATCHED_PAREN;
+	      goto leave;
+	    }
 	  MAKE_SPACE (0);
 	  *c.pos++ = ST_CLOSE;
 	  level--;

-----------------------------------------------------------------------

Summary of changes:
 src/sexp.c | 7 +++++++
 1 file changed, 7 insertions(+)


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