Bug#412092: [Patch] bug in gdth.c crashing machine

[Joerg Dorchain <joerg@dorchain.net>]

Package: linux-image-2.6.18-3-686
Version: 2.6.18-7
Tags: upstream,patch
Severity: important

Hello,

there is a bug in the gdth driver causing crashes and potential data
losses when using tape. The bug is also described and confirmed on the lklm
on 13 Oct 2006
Message-ID: <EF6AF37986D67948AD48624A3E5D93AFE72291@mtce2k01.adaptec.com>

The included patch is derived directly from that mail.

Please consider including it until it has made it upstream, as it
endangers machines doing tape backups.

Bye,

Joerg


--- gdth.c.orig	2007-02-23 12:48:56.000000000 +0100
+++ gdth.c	2007-02-23 12:51:44.000000000 +0100
@@ -3092,6 +3092,7 @@
             cmdp->u.raw64.direction  = 
                 gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN;
             memcpy(cmdp->u.raw64.cmd,scp->cmnd,16);
+            cmdp->u.raw64.sg_ranz    = 0;
         } else {
             cmdp->u.raw.reserved   = 0;
             cmdp->u.raw.mdisc_time = 0;
@@ -3108,6 +3109,7 @@
             cmdp->u.raw.direction  = 
                 gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN;
             memcpy(cmdp->u.raw.cmd,scp->cmnd,12);
+            cmdp->u.raw.sg_ranz    = 0;
         }
 
         if (scp->use_sg) {