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Fix BZ #16734 -- fopen calls mmap to allocate its buffer

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This commit is contained in:
Paul Pluzhnikov
2015-08-12 18:56:08 -07:00
parent 84895dca70
commit 8a29509dd9
8 changed files with 36 additions and 55 deletions
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12
libio/genops.c
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@ -398,7 +398,7 @@ _IO_setb (f, b, eb, a)
int a;
{
if (f->_IO_buf_base && !(f->_flags & _IO_USER_BUF))
FREE_BUF (f->_IO_buf_base, _IO_blen (f));
free (f->_IO_buf_base);
f->_IO_buf_base = b;
f->_IO_buf_end = eb;
if (a)
@ -587,7 +587,10 @@ _IO_default_doallocate (fp)
{
char *buf;
ALLOC_BUF (buf, _IO_BUFSIZ, EOF);
buf = malloc(_IO_BUFSIZ);
if (__glibc_unlikely (buf == NULL))
return EOF;
_IO_setb (fp, buf, buf+_IO_BUFSIZ, 1);
return 1;
}
@ -687,7 +690,7 @@ _IO_default_finish (fp, dummy)
struct _IO_marker *mark;
if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
{
FREE_BUF (fp->_IO_buf_base, _IO_blen (fp));
free (fp->_IO_buf_base);
fp->_IO_buf_base = fp->_IO_buf_end = NULL;
}
@ -972,7 +975,6 @@ _IO_unbuffer_all (void)
fp->_freeres_list = freeres_list;
freeres_list = fp;
fp->_freeres_buf = fp->_IO_buf_base;
fp->_freeres_size = _IO_blen (fp);
}
_IO_SETBUF (fp, NULL, 0);
@ -999,7 +1001,7 @@ libc_freeres_fn (buffer_free)
while (freeres_list != NULL)
{
FREE_BUF (freeres_list->_freeres_buf, freeres_list->_freeres_size);
free (freeres_list->_freeres_buf);
freeres_list = freeres_list->_freeres_list;
}