shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-05 02:21:52 +09:00
Code Issues Packages Projects Releases Wiki Activity

iommu: Fix a leak in iommu_insert_resv_region

Browse Source 
[ Upstream commit ad0834deda ]

In case we expand an existing region, we unlink
this latter and insert the larger one. In
that case we should free the original region after
the insertion. Also we can immediately return.

Fixes: 6c65fb318e ("iommu: iommu_get_group_resv_regions")

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Auger
2019-06-03 08:53:30 +02:00
committed by Greg Kroah-Hartman
parent 8231f0a084
commit 6eb4ac7a14
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/iommu/iommu.c
View File

@@ -205,18 +205,21 @@ static int iommu_insert_resv_region(struct iommu_resv_region *new,
pos = pos->next;
} else if ((start >= a) && (end <= b)) {
if (new->type == type)
goto done;
return 0;
else
pos = pos->next;
} else {
if (new->type == type) {
phys_addr_t new_start = min(a, start);
phys_addr_t new_end = max(b, end);
int ret;
list_del(&entry->list);
entry->start = new_start;
entry->length = new_end - new_start + 1;
iommu_insert_resv_region(entry, regions);
ret = iommu_insert_resv_region(entry, regions);
kfree(entry);
return ret;
} else {
pos = pos->next;
}
@@ -229,7 +232,6 @@ insert:
return -ENOMEM;
list_add_tail(&region->list, pos);
done:
return 0;
}