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* fhandler_raw.cc (fhandler_dev_raw::ioctl): Fix INVALID_PARAMETER

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condition.  Only copy devbuf to buf if buf is non-NULL.
This commit is contained in:
Corinna Vinschen
2005-12-07 19:01:29 +00:00
parent bb4e8382c5
commit db58e35d94
2 changed files with 11 additions and 3 deletions
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5
winsup/cygwin/ChangeLog
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@@ -1,3 +1,8 @@
2005-12-07 Corinna Vinschen <corinna@vinschen.de>
* fhandler_raw.cc (fhandler_dev_raw::ioctl): Fix INVALID_PARAMETER
condition. Only copy devbuf to buf if buf is non-NULL.
2005-12-07 Corinna Vinschen <corinna@vinschen.de>
* fhandler_raw.cc (fhandler_dev_raw::ioctl): Fix setting devbuf

9
winsup/cygwin/fhandler_raw.cc
View File

@@ -157,22 +157,25 @@ fhandler_dev_raw::ioctl (unsigned int cmd, void *buf)
mop.mt_count = op->rd_parm;
ret = ioctl (MTIOCTOP, &mop);
}
else if (devbuf && op->rd_parm < devbufend - devbufstart)
else if (devbuf && ((op->rd_parm <= 1 && (devbufend - devbufstart))
|| op->rd_parm < devbufend - devbufstart))
ret = ERROR_INVALID_PARAMETER;
else if (!devbuf || op->rd_parm != devbufsiz)
{
char *buf = NULL;
if (op->rd_parm > 1L)
buf = new char [op->rd_parm];
if (devbufsiz > 1L)
if (buf && devbufsiz > 1L)
{
memcpy (buf, devbuf + devbufstart, devbufend - devbufstart);
devbufend -= devbufstart;
delete [] devbuf;
}
else
devbufend = 0;
if (devbufsiz > 1L)
delete [] devbuf;
devbufstart = 0;
devbuf = buf;
devbufsiz = op->rd_parm ?: 1L;