[RFC v1 02/19] uprobes: Correctly reject anonymous VMAs for breakpoint installation

[Andi Kleen]

Checking for anonymous VMAs is supposed to use this special function,
not just check vm_file.

Assisted-by: omp:gpt-5.6-luna sashiko
Signed-off-by: Andi Kleen <ak@xxxxxxxxxx>
---
 kernel/events/uprobes.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 7709ea882477..4287c4ff4c0f 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -139,7 +139,8 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
 	if (is_register)
 		flags |= VM_WRITE;
 
-	return vma->vm_file && (vma->vm_flags & flags) == VM_MAYEXEC;
+	return !vma_is_anonymous(vma) && vma->vm_file &&
+		(vma->vm_flags & flags) == VM_MAYEXEC;
 }
 
 static unsigned long offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
-- 
2.54.0