tree d137236bcde8b921d7126987aef5601bdcec03d9
parent f42f498bee4760d4db6f55cfab98f42ae7660e1c
author Mikulas Patocka <mpatocka@redhat.com> 1245661682 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1246578058 -0700

dm mpath: validate table argument count

commit 0e0497c0c017664994819f4602dc07fd95896c52 upstream.

The parser reads the argument count as a number but doesn't check that
sufficient arguments are supplied. This command triggers the bug:

dmsetup create mpath --table "0 `blockdev --getsize /dev/mapper/cr0`
    multipath 0 0 2 1 round-robin 1000 0 1 1 /dev/mapper/cr0
    round-robin 0 1 1 /dev/mapper/cr1 1000"
kernel BUG at drivers/md/dm-mpath.c:530!

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>