Commit 8491502f authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds
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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: default avatarChristoph Hellwig <hch@lst.de>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 82a70ce0

mm/vmalloc.c

+1 −1
Original line number Diff line number Diff line
@@ -316,7 +316,7 @@ int ioremap_page_range(unsigned long addr, unsigned long end, 
{

	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;