Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5513c5f6f9bd8c8ad3727130910fa288c62526a7
Commit:     5513c5f6f9bd8c8ad3727130910fa288c62526a7
Parent:     2e2705bdcb959372d54bf7f79dd9a555ec2adfb4
Author:     Stefan Richter <[EMAIL PROTECTED]>
AuthorDate: Sun Feb 17 14:56:19 2008 +0100
Committer:  Stefan Richter <[EMAIL PROTECTED]>
CommitDate: Tue Feb 19 19:57:23 2008 +0100

    firewire: fw-sbp2: fix NULL pointer deref. in slave_alloc
    
    Fix a kernel bug when running rescan-scsi-bus while a FireWire disk is
    connected:  http://bugzilla.kernel.org/show_bug.cgi?id=10008
    
    Signed-off-by: Stefan Richter <[EMAIL PROTECTED]>
---
 drivers/firewire/fw-sbp2.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index ea4811c..60ebcb5 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1473,6 +1473,10 @@ static int sbp2_scsi_slave_alloc(struct scsi_device 
*sdev)
 {
        struct sbp2_logical_unit *lu = sdev->hostdata;
 
+       /* (Re-)Adding logical units via the SCSI stack is not supported. */
+       if (!lu)
+               return -ENOSYS;
+
        sdev->allow_restart = 1;
 
        /*
-
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