diff mbox series

[055/147] mm: don't allow executable ioremap mappings

Message ID 20210908025604.WeTOgRzRO%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/147] mm, slub: don't call flush_all() from slab_debug_trace_open() | expand

Commit Message

Andrew Morton Sept. 8, 2021, 2:56 a.m. UTC 
From: Christoph Hellwig <hch@lst.de>
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@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- 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;