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video: tegra: nvmap: Don't allow executable mapping

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Don't allow executable mapping during mmap on the fd corresponding to
memory buffer to prevent security risks of code injection and execution
in kernel space.

JIRA TMM-5962

Change-Id: I3d756afdd1b51c8d651230f1a634ef0909d17cc7
Signed-off-by: Ketan Patil <ketanp@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3298639
Reviewed-by: Ajay Nandakumar Mannargudi <anandakumarm@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Pritesh Raithatha <praithatha@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
This commit is contained in:
Ketan Patil
2025-02-07 13:31:33 +00:00
committed by Jon Hunter
parent 63a1d3e6e0
commit afd5300c2b
1 changed files with 9 additions and 0 deletions
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9
drivers/video/tegra/nvmap/nvmap_dmabuf.c
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@@ -376,6 +376,15 @@ static int __nvmap_map(struct nvmap_handle *h, struct vm_area_struct *vma)
return -EPERM;
}
/*
* Don't allow executable mappings.
*/
if (vma->vm_flags & VM_EXEC) {
pr_err("executable mappings not allowed\n");
nvmap_handle_put(h);
return -EPERM;
}
/*
* If the handle is RO and RW mapping is requested, then
* return error.