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2004-05-13  Jakub Jelinek  <jakub@redhat.com>

	* libio/genops.c (_IO_default_xsputn): Avoid one overflow per char if
	count is negative, yet write_ptr < write_end.
	(_IO_default_xsgetn): Avoid one underflow per char if count is
	negative, yet read_ptr < read_end.
This commit is contained in:
Ulrich Drepper 2004-05-13 17:39:36 +00:00
parent 7f4311e8bf
commit f7803f5170
2 changed files with 15 additions and 12 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2004-05-13 Jakub Jelinek <jakub@redhat.com>
* libio/genops.c (_IO_default_xsputn): Avoid one overflow per char if
count is negative, yet write_ptr < write_end.
(_IO_default_xsgetn): Avoid one underflow per char if count is
negative, yet read_ptr < read_end.
2004-05-12 Steven Munroe <sjmunroe@us.ibm.com>
* sysdeps/unix/sysv/linux/powerpc/bits/termios.h (XTABS): Define XTABS

20
libio/genops.c
View File

@ -447,10 +447,10 @@ _IO_default_xsputn (f, data, n)
for (;;)
{
/* Space available. */
_IO_ssize_t count = f->_IO_write_end - f->_IO_write_ptr;
if (count > 0)
if (f->_IO_write_ptr < f->_IO_write_end)
{
if ((_IO_size_t) count > more)
_IO_size_t count = f->_IO_write_end - f->_IO_write_ptr;
if (count > more)
count = more;
if (count > 20)
{
@ -462,9 +462,7 @@ _IO_default_xsputn (f, data, n)
#endif
s += count;
}
else if (count <= 0)
count = 0;
else
else if (count)
{
char *p = f->_IO_write_ptr;
_IO_ssize_t i;
@ -504,10 +502,10 @@ _IO_default_xsgetn (fp, data, n)
for (;;)
{
/* Data available. */
_IO_ssize_t count = fp->_IO_read_end - fp->_IO_read_ptr;
if (count > 0)
if (fp->_IO_read_ptr < fp->_IO_read_end)
{
if ((_IO_size_t) count > more)
_IO_size_t count = fp->_IO_read_end - fp->_IO_read_ptr;
if (count > more)
count = more;
if (count > 20)
{
@ -519,9 +517,7 @@ _IO_default_xsgetn (fp, data, n)
#endif
fp->_IO_read_ptr += count;
}
else if (count <= 0)
count = 0;
else
else if (count)
{
char *p = fp->_IO_read_ptr;
int i = (int) count;