[ Upstream commit ad0834dedaa15c3a176f783c0373f836e44b4700 ]
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: 6c65fb318e8b ("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 --- drivers/iommu/iommu.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 109de67d5d72..2d06c507fbed 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -241,18 +241,21 @@ 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; } @@ -265,7 +268,6 @@ static int iommu_insert_resv_region(struct iommu_resv_region *new, return -ENOMEM;
list_add_tail(®ion->list, pos); -done: return 0; }