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iommu/tegra: gart: Fix NULL pointer dereference

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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);