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xen-devel
Re: [Xen-devel] [Xen HV PATCH] VT-d: Fix resource leaks on error paths
Thanks Keir,
I'll repost patch and cc Allen
On 05/12/2011 10:11 AM, Keir Fraser wrote:
Will need an Ack from a VT-d maintainer (Allen Kay is listed in our
MAINTAINERS file, and is CC'ed). Also needs a Signed-off-by line.
-- Keir
On 11/05/2011 12:45, "Igor Mammedov"<imammedo@xxxxxxxxxx> wrote:
On error exit from function, maped pages should be unmapped
and acquired locks released.
diff -r 4b0692880dfa -r da93d9e43b3c xen/drivers/passthrough/vtd/intremap.c
--- a/xen/drivers/passthrough/vtd/intremap.c Thu May 05 17:40:34 2011 +0100
+++ b/xen/drivers/passthrough/vtd/intremap.c Wed May 11 12:29:54 2011 +0200
@@ -210,7 +210,8 @@
if ( iremap_entries )
unmap_vtd_domain_page(iremap_entries);
- ir_ctrl->iremap_num++;
+ if ( i< IREMAP_ENTRY_NR )
+ ir_ctrl->iremap_num++;
return i;
}
@@ -246,6 +247,8 @@
dprintk(XENLOG_ERR VTDPREFIX,
"%s: index (%d) get an empty entry!\n",
__func__, index);
+ unmap_vtd_domain_page(iremap_entries);
+ spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
return -EFAULT;
}
@@ -281,7 +284,8 @@
if ( index< 0 )
{
index = alloc_remap_entry(iommu);
- apic_pin_2_ir_idx[apic][ioapic_pin] = index;
+ if ( index< IREMAP_ENTRY_NR )
+ apic_pin_2_ir_idx[apic][ioapic_pin] = index;
}
if ( index> IREMAP_ENTRY_NR - 1 )
@@ -546,6 +550,8 @@
dprintk(XENLOG_ERR VTDPREFIX,
"%s: index (%d) get an empty entry!\n",
__func__, index);
+ unmap_vtd_domain_page(iremap_entries);
+ spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
return -EFAULT;
}
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