diff options
| author | Liam Mark <lmark@codeaurora.org> | 2017-05-15 10:50:23 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-05-30 09:29:54 -0700 |
| commit | aecadd7140eff321005c8da286bf66c1fa235024 (patch) | |
| tree | 9eaa862f1fc60ce7a88ae5120673e0165865416e /drivers/iommu/iommu-debug.c | |
| parent | a283c457eeb345671f48acb34aa76a893c3837ca (diff) | |
iommu: iommu-debug: limit memory address exposure
Update pte and dma atos debugfs nodes to be inline
with other iommu debugfs nodes and only expose memory
addresses when kptr_restrict is disabled.
Change-Id: I46d5de498b811b4874be570aea7b41461b9a1a98
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Diffstat (limited to 'drivers/iommu/iommu-debug.c')
| -rw-r--r-- | drivers/iommu/iommu-debug.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-debug.c b/drivers/iommu/iommu-debug.c index b8155c9227d3..c21846c1f8d5 100644 --- a/drivers/iommu/iommu-debug.c +++ b/drivers/iommu/iommu-debug.c @@ -1491,6 +1491,10 @@ static ssize_t iommu_debug_pte_read(struct file *file, char __user *ubuf, ssize_t retval; size_t buflen; + if (kptr_restrict != 0) { + pr_err("kptr_restrict needs to be disabled.\n"); + return -EPERM; + } if (!dev->archdata.mapping) { pr_err("No mapping. Did you already attach?\n"); return -EINVAL; @@ -1610,6 +1614,10 @@ static ssize_t iommu_debug_dma_atos_read(struct file *file, char __user *ubuf, ssize_t retval; size_t buflen; + if (kptr_restrict != 0) { + pr_err("kptr_restrict needs to be disabled.\n"); + return -EPERM; + } if (!dev->archdata.mapping) { pr_err("No mapping. Did you already attach?\n"); return -EINVAL; |