diff mbox series

[v9,5/7] mseal sysmap: uprobe mapping

Message ID 20250305021711.3867874-6-jeffxu@google.com (mailing list archive)
State In Next
Commit 20eaeeb1367f2dda134681112c7d3b170a0bc2d4
Headers show
Series mseal system mappings | expand

Commit Message

Jeff Xu March 5, 2025, 2:17 a.m. UTC 
From: Jeff Xu <jeffxu@chromium.org>

Provide support to mseal the uprobe mapping.

Unlike other system mappings, the uprobe mapping is not
established during program startup. However, its lifetime is the same
as the process's lifetime. It could be sealed from creation.

Test was done with perf tool, and observe the uprobe mapping is sealed.

Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Kees Cook <kees@kernel.org>
---
 kernel/events/uprobes.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index bf2a87a0a378..98632bc47216 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1683,7 +1683,8 @@  static int xol_add_vma(struct mm_struct *mm, struct xol_area *area)
 	}
 
 	vma = _install_special_mapping(mm, area->vaddr, PAGE_SIZE,
-				VM_EXEC|VM_MAYEXEC|VM_DONTCOPY|VM_IO,
+				VM_EXEC|VM_MAYEXEC|VM_DONTCOPY|VM_IO|
+				VM_SEALED_SYSMAP,
 				&xol_mapping);
 	if (IS_ERR(vma)) {
 		ret = PTR_ERR(vma);