From: Jeff Xu <jeffxu@google.com>
check sealing for mprotect(2).
Signed-off-by: Jeff Xu <jeffxu@google.com>
---
mm/mprotect.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 130db91d3a8c..5b67c66d55f7 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -753,6 +753,12 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
}
}
+ if (!can_modify_mm(current->mm, start, end, MM_ACTION_MPROTECT,
+ ON_BEHALF_OF_USERSPACE)) {
+ error = -EACCES;
+ goto out;
+ }
+
prev = vma_prev(&vmi);
if (start > vma->vm_start)
prev = vma;
--
2.42.0.609.gbb76f46606-goog