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-rw-r--r--misc/Makefile3
-rw-r--r--misc/mntent_r.c4
-rw-r--r--misc/tst-mntent-blank-corrupt.c45
-rw-r--r--misc/tst-mntent-blank-passno.c53
-rw-r--r--misc/tst-mntent.c20
5 files changed, 103 insertions, 22 deletions
diff --git a/misc/Makefile b/misc/Makefile
index aecb0da..2f5edf6 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -76,7 +76,8 @@ install-lib := libg.a
gpl2lgpl := error.c error.h
tests := tst-dirname tst-tsearch tst-fdset tst-efgcvt tst-mntent tst-hsearch \
- tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1
+ tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1 \
+ tst-mntent-blank-corrupt tst-mntent-blank-passno
ifeq ($(run-built-tests),yes)
tests-special += $(objpfx)tst-error1-mem.out
endif
diff --git a/misc/mntent_r.c b/misc/mntent_r.c
index 6159873..4f26998 100644
--- a/misc/mntent_r.c
+++ b/misc/mntent_r.c
@@ -136,7 +136,9 @@ __getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz)
end_ptr = strchr (buffer, '\n');
if (end_ptr != NULL) /* chop newline */
{
- while (end_ptr[-1] == ' ' || end_ptr[-1] == '\t')
+ /* Do not walk past the start of buffer if it's all whitespace. */
+ while (end_ptr != buffer
+ && (end_ptr[-1] == ' ' || end_ptr[-1] == '\t'))
end_ptr--;
*end_ptr = '\0';
}
diff --git a/misc/tst-mntent-blank-corrupt.c b/misc/tst-mntent-blank-corrupt.c
new file mode 100644
index 0000000..92266a3
--- /dev/null
+++ b/misc/tst-mntent-blank-corrupt.c
@@ -0,0 +1,45 @@
+/* Make sure blank lines does not cause memory corruption BZ #18887.
+
+ Copyright (C) 2009-2015 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 <mntent.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Make sure blank lines don't trigger memory corruption. This doesn't happen
+ for all targets though, so it's a best effort test BZ #18887. */
+static int
+do_test (void)
+{
+ FILE *fp;
+
+ fp = tmpfile ();
+ fputs ("\n \n/foo\\040dir /bar\\040dir auto bind \t \n", fp);
+ rewind (fp);
+
+ /* The corruption happens here ... */
+ getmntent (fp);
+ /* ... but trigers here. */
+ endmntent (fp);
+
+ /* If the test failed, we would crash, and not hit this point. */
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/misc/tst-mntent-blank-passno.c b/misc/tst-mntent-blank-passno.c
new file mode 100644
index 0000000..fc04291
--- /dev/null
+++ b/misc/tst-mntent-blank-passno.c
@@ -0,0 +1,53 @@
+/* Make sure trailing whitespace is handled properly BZ #17273.
+
+ Copyright (C) 2009-2015 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 <mntent.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Check entries to make sure trailing whitespace is ignored and we return the
+ correct passno value BZ #17273. */
+static int
+do_test (void)
+{
+ int result = 0;
+ FILE *fp;
+ struct mntent *mnt;
+
+ fp = tmpfile ();
+ fputs ("/foo\\040dir /bar\\040dir auto bind \t \n", fp);
+ rewind (fp);
+
+ mnt = getmntent (fp);
+ if (strcmp (mnt->mnt_fsname, "/foo dir") != 0
+ || strcmp (mnt->mnt_dir, "/bar dir") != 0
+ || strcmp (mnt->mnt_type, "auto") != 0
+ || strcmp (mnt->mnt_opts, "bind") != 0
+ || mnt->mnt_freq != 0
+ || mnt->mnt_passno != 0)
+ {
+ puts ("Error while reading entry with trailing whitespaces");
+ result = 1;
+ }
+
+ return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/misc/tst-mntent.c b/misc/tst-mntent.c
index 932fd3f..b6ad8af 100644
--- a/misc/tst-mntent.c
+++ b/misc/tst-mntent.c
@@ -73,26 +73,6 @@ do_test (void)
puts ("Error while reading written entry back in");
result = 1;
}
-
- /* Part III: Entry with whitespaces at the end of a line. */
- rewind (fp);
-
- fputs ("/foo\\040dir /bar\\040dir auto bind \t \n", fp);
-
- rewind (fp);
-
- mnt = getmntent (fp);
-
- if (strcmp (mnt->mnt_fsname, "/foo dir") != 0
- || strcmp (mnt->mnt_dir, "/bar dir") != 0
- || strcmp (mnt->mnt_type, "auto") != 0
- || strcmp (mnt->mnt_opts, "bind") != 0
- || mnt->mnt_freq != 0
- || mnt->mnt_passno != 0)
- {
- puts ("Error while reading entry with trailing whitespaces");
- result = 1;
- }
}
return result;