File fnmatch-read-eos.patch of Package glibc.2646

Overview Repositories Revisions Requests Users Attributes Meta

File fnmatch-read-eos.patch of Package glibc.2646

2015-03-02  Paul Pluzhnikov  <ppluzhnikov@google.com>

[BZ #18036]
	* posix/fnmatch_loop.c (END): Detect invalid pattern.
	* posix/tst-fnmatch3.c (do_bz18036): Add test case.

2015-02-26  Andreas Schwab  <schwab@suse.de>

[BZ #18032]
	* posix/fnmatch_loop.c (FCT): Remove extra increment when skipping
	over collating symbol inside a bracket expression.  Minor cleanup.
	* posix/tst-fnmatch3.c (do_test): Add test case.

2014-06-18  Andreas Schwab  <schwab@suse.de>

[BZ #17062]
	* posix/fnmatch_loop.c (FCT): Rerrange loop for skipping over rest
	of a bracket expr not to run off the end of the string.
	* posix/Makefile (tests): Add tst-fnmatch3.
	* posix/tst-fnmatch3.c: New file.

Index: glibc-2.19/posix/Makefile
===================================================================
--- glibc-2.19.orig/posix/Makefile
+++ glibc-2.19/posix/Makefile
@@ -86,7 +86,8 @@ tests		:= tstgetopt testfnm runtests run
 		   tst-getaddrinfo3 tst-fnmatch2 tst-cpucount tst-cpuset \
 		   bug-getopt1 bug-getopt2 bug-getopt3 bug-getopt4 \
 		   bug-getopt5 tst-getopt_long1 bug-regex34 bug-regex35 \
-		   tst-pathconf tst-getaddrinfo4
+ 		   tst-pathconf tst-getaddrinfo4 \
+		   tst-fnmatch3
 xtests		:= bug-ga2
 ifeq (yes,$(build-shared))
 test-srcs	:= globtest
Index: glibc-2.19/posix/fnmatch_loop.c
===================================================================
--- glibc-2.19.orig/posix/fnmatch_loop.c
+++ glibc-2.19/posix/fnmatch_loop.c
@@ -899,11 +899,8 @@ FCT (pattern, string, string_end, no_lea
 
 	  matched:
 	    /* Skip the rest of the [...] that already matched.  */
-	    do
+	    while ((c = *p++) != L (']'))
 	      {
-	      ignore_next:
-		c = *p++;
-
 		if (c == L('\0'))
 		  /* [... (unterminated) loses.  */
 		  return FNM_NOMATCH;
@@ -931,12 +928,11 @@ FCT (pattern, string, string_end, no_lea
 
 			if (c < L('a') || c >= L('z'))
 			  {
-			    p = startp;
-			    goto ignore_next;
+			    p = startp - 2;
+			    break;
 			  }
 		      }
 		    p += 2;
-		    c = *p++;
 		  }
 		else if (c == L('[') && *p == L('='))
 		  {
@@ -947,25 +943,21 @@ FCT (pattern, string, string_end, no_lea
 		    if (c != L('=') || p[1] != L(']'))
 		      return FNM_NOMATCH;
 		    p += 2;
-		    c = *p++;
 		  }
 		else if (c == L('[') && *p == L('.'))
 		  {
-		    ++p;
 		    while (1)
 		      {
 			c = *++p;
-			if (c == '\0')
+			if (c == L('\0'))
 			  return FNM_NOMATCH;
 
-			if (*p == L('.') && p[1] == L(']'))
+			if (c == L('.') && p[1] == L(']'))
 			  break;
 		      }
 		    p += 2;
-		    c = *p++;
 		  }
 	      }
-	    while (c != L(']'));
 	    if (not)
 	      return FNM_NOMATCH;
 	  }
@@ -1045,7 +1037,12 @@ END (const CHAR *pattern)
       }
     else if ((*p == L('?') || *p == L('*') || *p == L('+') || *p == L('@')
 	      || *p == L('!')) && p[1] == L('('))
-      p = END (p + 1);
+      {
+	p = END (p + 1);
+	if (*p == L('\0'))
+	  /* This is an invalid pattern.  */
+	  return pattern;
+      }
     else if (*p == L(')'))
       break;
 
Index: glibc-2.19/posix/tst-fnmatch3.c
===================================================================
--- /dev/null
+++ glibc-2.19/posix/tst-fnmatch3.c
@@ -0,0 +1,52 @@
+/* Test for fnmatch not reading past the end of the pattern.
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fnmatch.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <unistd.h>
+
+int
+do_bz18036 (void)
+{
+  const char p[] = "**(!()";
+  const int pagesize = getpagesize ();
+
+  char *pattern = mmap (0, 2 * pagesize, PROT_READ|PROT_WRITE,
+                        MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+  if (pattern == MAP_FAILED) return 1;
+
+  mprotect (pattern + pagesize, pagesize, PROT_NONE);
+  memset (pattern, ' ', pagesize);
+  strcpy (pattern, p);
+
+  return fnmatch (pattern, p, FNM_EXTMATCH);
+}
+
+int
+do_test (void)
+{
+  if (fnmatch ("[[:alpha:]'[:alpha:]\0]", "a", 0) != FNM_NOMATCH)
+    return 1;
+  if (fnmatch ("[a[.\0.]]", "a", 0) != FNM_NOMATCH)
+    return 1;
+  return do_bz18036 ();
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"

Places

File fnmatch-read-eos.patch of Package glibc.2646

Places