Messages in this thread Patch in this message | | | Date | Sun, 06 Dec 2009 15:30:36 -0800 | From | Greg KH <> | Subject | [04/20] [SCSI] gdth: Prevent negative offsets in ioctl CVE-2009-3080 |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------ From: Dave Jones <davej@redhat.com>
commit 690e744869f3262855b83b4fb59199cf142765b0 upstream.
A negative offset could be used to index before the event buffer and lead to a security breach.
Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/scsi/gdth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -2912,7 +2912,7 @@ static int gdth_read_event(gdth_ha_str * eindex = handle; estr->event_source = 0; - if (eindex >= MAX_EVENTS) { + if (eindex < 0 || eindex >= MAX_EVENTS) { spin_unlock_irqrestore(&ha->smp_lock, flags); return eindex; }
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