quoted

quoted

diff --git a/kernel/unwind/sframe_debug.h b/kernel/unwind/sframe_debug.h

quoted

+static inline void dbg_init(struct sframe_section *sec)
+{
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+
+	guard(mmap_read_lock)(mm);
+	vma = vma_lookup(mm, sec->sframe_start);
+	if (!vma)
+		sec->filename = kstrdup("(vma gone???)", GFP_KERNEL);
+	else if (vma->vm_file)
+		sec->filename = kstrdup_quotable_file(vma->vm_file, GFP_KERNEL);
+	else if (!vma->vm_mm)

This condition does not appear to work for vdso on s390.

I had a fix for this which somehow got dropped:

diff --git a/kernel/unwind/sframe_debug.h b/kernel/unwind/sframe_debug.h
index 3bb3c5574aee..045e9c0b16c9 100644
--- a/kernel/unwind/sframe_debug.h
+++ b/kernel/unwind/sframe_debug.h

@@ -67,6 +67,10 @@ static inline void dbg_init(struct sframe_section *sec)
  		sec->filename = kstrdup("(vma gone???)", GFP_KERNEL);
  	else if (vma->vm_file)
  		sec->filename = kstrdup_quotable_file(vma->vm_file, GFP_KERNEL);
+	else if (vma->vm_ops && vma->vm_ops->name)
+		sec->filename = kstrdup(vma->vm_ops->name(vma), GFP_KERNEL);
+	else if (arch_vma_name(vma))
+		sec->filename = kstrdup(arch_vma_name(vma), GFP_KERNEL);
  	else if (!vma->vm_mm)
  		sec->filename = kstrdup("(vdso)", GFP_KERNEL);
  	else