28 lines
1.1 KiB
Diff
28 lines
1.1 KiB
Diff
commit ecc7c3deb9f347649c2078fcc0f94d4cedf92d60
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
|
Date: Tue Jan 2 14:36:17 2024 +0100
|
|
|
|
libio: Check remaining buffer size in _IO_wdo_write (bug 31183)
|
|
|
|
The multibyte character needs to fit into the remaining buffer space,
|
|
not the already-written buffer space. Without the fix, we were never
|
|
moving the write pointer from the start of the buffer, always using
|
|
the single-character fallback buffer.
|
|
|
|
Fixes commit 04b76b5aa8b2d1d19066e42dd1 ("Don't error out writing
|
|
a multibyte character to an unbuffered stream (bug 17522)").
|
|
|
|
diff --git a/libio/wfileops.c b/libio/wfileops.c
|
|
index d3deb34ba058ca39..6a6421f8880f9356 100644
|
|
--- a/libio/wfileops.c
|
|
+++ b/libio/wfileops.c
|
|
@@ -57,7 +57,7 @@ _IO_wdo_write (FILE *fp, const wchar_t *data, size_t to_do)
|
|
char mb_buf[MB_LEN_MAX];
|
|
char *write_base, *write_ptr, *buf_end;
|
|
|
|
- if (fp->_IO_write_ptr - fp->_IO_write_base < sizeof (mb_buf))
|
|
+ if (fp->_IO_buf_end - fp->_IO_write_ptr < sizeof (mb_buf))
|
|
{
|
|
/* Make sure we have room for at least one multibyte
|
|
character. */
|