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[Qemu-devel] [PATCH] vfio: add check for memory region overflow conditio
From: |
Bandan Das |
Subject: |
[Qemu-devel] [PATCH] vfio: add check for memory region overflow condition |
Date: |
Mon, 21 Mar 2016 18:00:50 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
vfio_listener_region_add for a iommu mr results in
an overflow assert since emulated iommu memory region is initialized
with UINT64_MAX. Add a check just like memory_region_size()
does.
Signed-off-by: Bandan Das <address@hidden>
---
hw/vfio/common.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index fb588d8..269244b 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -349,7 +349,12 @@ static void vfio_listener_region_add(MemoryListener
*listener,
if (int128_ge(int128_make64(iova), llend)) {
return;
}
- end = int128_get64(llend);
+
+ if (int128_eq(llend, int128_2_64())) {
+ end = UINT64_MAX;
+ } else {
+ end = int128_get64(llend);
+ }
if ((iova < container->min_iova) || ((end - 1) > container->max_iova)) {
error_report("vfio: IOMMU container %p can't map guest IOVA region"
--
2.7.0
- [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition,
Bandan Das <=
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Alex Williamson, 2016/03/21
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Bandan Das, 2016/03/21
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Alex Williamson, 2016/03/21
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Bandan Das, 2016/03/21
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Alex Williamson, 2016/03/21
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Bandan Das, 2016/03/22
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Alex Williamson, 2016/03/22
- Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Bandan Das, 2016/03/22
Re: [Qemu-devel] [PATCH] vfio: add check for memory region overflow condition, Peter Xu, 2016/03/21