15 lines
369 B
Groff
15 lines
369 B
Groff
diff --git a/mm/madvise.c b/mm/madvise.c
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index af3d573..4e19615 100644
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--- a/mm/madvise.c
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+++ b/mm/madvise.c
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@@ -168,6 +168,9 @@ static long madvise_remove(struct vm_are
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return -EINVAL;
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}
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+ if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE))
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+ return -EACCES;
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+
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mapping = vma->vm_file->f_mapping;
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offset = (loff_t)(start - vma->vm_start)
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