From: Christoph Hellwig <hch@xxxxxx> Subject: mm: don't allow executable ioremap mappings There is no need to execute from iomem (and most platforms it is impossible anyway), so add the pgprot_nx() call similar to vmap. Link: https://lkml.kernel.org/r/20210824091259.1324527-3-hch@xxxxxx Signed-off-by: Christoph Hellwig <hch@xxxxxx> Cc: Nicholas Piggin <npiggin@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/vmalloc.c~mm-dont-allow-executable-ioremap-mappings +++ a/mm/vmalloc.c @@ -316,7 +316,7 @@ int ioremap_page_range(unsigned long add { int err; - err = vmap_range_noflush(addr, end, phys_addr, prot, + err = vmap_range_noflush(addr, end, phys_addr, pgprot_nx(prot), ioremap_max_page_shift); flush_cache_vmap(addr, end); return err; _
