|
 |
077c9d |
commit 32ff397533715988c19cbf3675dcbd727ec13e18
|
|
|
077c9d |
Author: Andreas Schwab <schwab@suse.de>
|
|
|
077c9d |
Date: Tue May 14 17:14:59 2019 +0200
|
|
|
077c9d |
|
|
|
077c9d |
Fix crash in _IO_wfile_sync (bug 20568)
|
|
|
077c9d |
|
|
|
077c9d |
When computing the length of the converted part of the stdio buffer, use
|
|
|
077c9d |
the number of consumed wide characters, not the (negative) distance to the
|
|
|
077c9d |
end of the wide buffer.
|
|
|
077c9d |
|
|
|
077c9d |
Conflicts:
|
|
|
077c9d |
libio/Makefile
|
|
|
077c9d |
(Usual conflict when adding tests due to missing backports.)
|
|
|
077c9d |
|
|
|
077c9d |
diff --git a/libio/Makefile b/libio/Makefile
|
|
|
077c9d |
index cab0eae946b1f307..cbfaf3832a45fc22 100644
|
|
|
077c9d |
--- a/libio/Makefile
|
|
|
077c9d |
+++ b/libio/Makefile
|
|
|
077c9d |
@@ -64,7 +64,8 @@ tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
|
|
|
077c9d |
bug-memstream1 bug-wmemstream1 \
|
|
|
077c9d |
tst-setvbuf1 tst-popen1 tst-fgetwc bug-wsetpos tst-fseek \
|
|
|
077c9d |
tst-fwrite-error tst-ftell-partial-wide tst-ftell-active-handler \
|
|
|
077c9d |
- tst-ftell-append tst-fputws tst-bz22415 tst-fgetc-after-eof
|
|
|
077c9d |
+ tst-ftell-append tst-fputws tst-bz22415 tst-fgetc-after-eof \
|
|
|
077c9d |
+ tst-wfile-sync
|
|
|
077c9d |
|
|
|
077c9d |
tests-internal = tst-vtables tst-vtables-interposed tst-readline
|
|
|
077c9d |
|
|
|
077c9d |
@@ -207,6 +208,7 @@ $(objpfx)tst-ungetwc1.out: $(gen-locales)
|
|
|
077c9d |
$(objpfx)tst-ungetwc2.out: $(gen-locales)
|
|
|
077c9d |
$(objpfx)tst-widetext.out: $(gen-locales)
|
|
|
077c9d |
$(objpfx)tst_wprintf2.out: $(gen-locales)
|
|
|
077c9d |
+$(objpfx)tst-wfile-sync.out: $(gen-locales)
|
|
|
077c9d |
endif
|
|
|
077c9d |
|
|
|
077c9d |
$(objpfx)test-freopen.out: test-freopen.sh $(objpfx)test-freopen
|
|
|
077c9d |
diff --git a/libio/tst-wfile-sync.c b/libio/tst-wfile-sync.c
|
|
|
077c9d |
new file mode 100644
|
|
|
077c9d |
index 0000000000000000..618682064da4035c
|
|
|
077c9d |
--- /dev/null
|
|
|
077c9d |
+++ b/libio/tst-wfile-sync.c
|
|
|
077c9d |
@@ -0,0 +1,39 @@
|
|
|
077c9d |
+/* Test that _IO_wfile_sync does not crash (bug 20568).
|
|
|
077c9d |
+ Copyright (C) 2019 Free Software Foundation, Inc.
|
|
|
077c9d |
+ This file is part of the GNU C Library.
|
|
|
077c9d |
+
|
|
|
077c9d |
+ The GNU C Library is free software; you can redistribute it and/or
|
|
|
077c9d |
+ modify it under the terms of the GNU Lesser General Public
|
|
|
077c9d |
+ License as published by the Free Software Foundation; either
|
|
|
077c9d |
+ version 2.1 of the License, or (at your option) any later version.
|
|
|
077c9d |
+
|
|
|
077c9d |
+ The GNU C Library is distributed in the hope that it will be useful,
|
|
|
077c9d |
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
077c9d |
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
077c9d |
+ Lesser General Public License for more details.
|
|
|
077c9d |
+
|
|
|
077c9d |
+ You should have received a copy of the GNU Lesser General Public
|
|
|
077c9d |
+ License along with the GNU C Library; if not, see
|
|
|
077c9d |
+ <http://www.gnu.org/licenses/>. */
|
|
|
077c9d |
+
|
|
|
077c9d |
+#include <locale.h>
|
|
|
077c9d |
+#include <stdio.h>
|
|
|
077c9d |
+#include <wchar.h>
|
|
|
077c9d |
+#include <support/check.h>
|
|
|
077c9d |
+#include <support/xunistd.h>
|
|
|
077c9d |
+
|
|
|
077c9d |
+static int
|
|
|
077c9d |
+do_test (void)
|
|
|
077c9d |
+{
|
|
|
077c9d |
+ TEST_VERIFY_EXIT (setlocale (LC_ALL, "de_DE.UTF-8") != NULL);
|
|
|
077c9d |
+ /* Fill the stdio buffer and advance the read pointer. */
|
|
|
077c9d |
+ TEST_VERIFY_EXIT (fgetwc (stdin) != WEOF);
|
|
|
077c9d |
+ /* This calls _IO_wfile_sync, it should not crash. */
|
|
|
077c9d |
+ TEST_VERIFY_EXIT (setvbuf (stdin, NULL, _IONBF, 0) == 0);
|
|
|
077c9d |
+ /* Verify that the external file offset has been synchronized. */
|
|
|
077c9d |
+ TEST_COMPARE (xlseek (0, 0, SEEK_CUR), 1);
|
|
|
077c9d |
+
|
|
|
077c9d |
+ return 0;
|
|
|
077c9d |
+}
|
|
|
077c9d |
+
|
|
|
077c9d |
+#include <support/test-driver.c>
|
|
|
077c9d |
diff --git a/libio/tst-wfile-sync.input b/libio/tst-wfile-sync.input
|
|
|
077c9d |
new file mode 100644
|
|
|
077c9d |
index 0000000000000000..12d0958f7aaa3865
|
|
|
077c9d |
--- /dev/null
|
|
|
077c9d |
+++ b/libio/tst-wfile-sync.input
|
|
|
077c9d |
@@ -0,0 +1 @@
|
|
|
077c9d |
+This is a test of _IO_wfile_sync.
|
|
|
077c9d |
diff --git a/libio/wfileops.c b/libio/wfileops.c
|
|
|
077c9d |
index 63cb687652c72ce1..10e7343f8fdb8781 100644
|
|
|
077c9d |
--- a/libio/wfileops.c
|
|
|
077c9d |
+++ b/libio/wfileops.c
|
|
|
077c9d |
@@ -508,11 +508,12 @@ _IO_wfile_sync (FILE *fp)
|
|
|
077c9d |
generate the wide characters up to the current reading
|
|
|
077c9d |
position. */
|
|
|
077c9d |
int nread;
|
|
|
077c9d |
-
|
|
|
077c9d |
+ size_t wnread = (fp->_wide_data->_IO_read_ptr
|
|
|
077c9d |
+ - fp->_wide_data->_IO_read_base);
|
|
|
077c9d |
fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
|
|
|
077c9d |
nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
|
|
|
077c9d |
fp->_IO_read_base,
|
|
|
077c9d |
- fp->_IO_read_end, delta);
|
|
|
077c9d |
+ fp->_IO_read_end, wnread);
|
|
|
077c9d |
fp->_IO_read_ptr = fp->_IO_read_base + nread;
|
|
|
077c9d |
delta = -(fp->_IO_read_end - fp->_IO_read_base - nread);
|
|
|
077c9d |
}
|