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iommu/tegra: gart: Fix NULL pointer dereference 

Fix NULL pointer dereference on IOMMU domain destruction that happens
because clients list is being iterated unsafely and its elements are
getting deleted during the iteration.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Dmitry Osipenko 2018-12-12 23:39:01 +03:00 committed by Joerg Roedel
parent c3086fad27
commit 8e924910dd
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/tegra-gart.c
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@ -260,9 +260,9 @@ static void gart_iommu_domain_free(struct iommu_domain *domain)
if (gart) {
spin_lock(&gart->client_lock);
if (!list_empty(&gart->client)) {
struct gart_client *c;
struct gart_client *c, *tmp;
list_for_each_entry(c, &gart->client, list)
list_for_each_entry_safe(c, tmp, &gart->client, list)
__gart_iommu_detach_dev(domain, c->dev);
}
spin_unlock(&gart->client_lock);