lkml.org 
[lkml]   [2000]   [Dec]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject2.2.19 hard hang from userspace while accessing /dev/mdXX devices

Hard hand in 2.2.19

If you open a non-existant md device (i.e. /dev/md11) from userspace
with an open() call, then send an ioctl() command, it results in the
following message then hard hangs the entire system if you attempt
to open any /dev/mdXX device with a minor number greater than 10.
Used to work on 2.2.17.

message is:

md map 11
bap map 11 ll_rw_block


offending code that causes the hard hang is:


register int fd, ccode;
struct hd_geometry geometry;

fd = open("/dev/md11", O_RDWR);
if (fd < 0)
return 1;

#ifdef HDIO_REQ
ccode = ioctl(fd, HDIO_REQ, &geometry);
#else
ccode = ioctl(fd, HDIO_GETGEO, &geometry);
#endif
if ((ccode == -EINVAL) || (ccode == -ENODEV))
{
close(fd);
return 1;
}
close(fd)
return 0;


Jeff

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.048 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site