The patch titled
Subject: mm: don't allow executable ioremap mappings
has been added to the -mm tree. Its filename is
mm-dont-allow-executable-ioremap-mappings.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-dont-allow-executable-ioremap-mappings.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-dont-allow-executable-ioremap-mappings.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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;
_
Patches currently in -mm which might be from hch@xxxxxx are
mmc-jz4740-remove-the-flush_kernel_dcache_page-call-in-jz4740_mmc_read_data.patch
mmc-mmc_spi-replace-flush_kernel_dcache_page-with-flush_dcache_page.patch
scatterlist-replace-flush_kernel_dcache_page-with-flush_dcache_page.patch
mm-remove-flush_kernel_dcache_page.patch
mm-move-ioremap_page_range-to-vmallocc.patch
mm-dont-allow-executable-ioremap-mappings.patch
proc-stop-using-seq_get_buf-in-proc_task_name.patch
kernel-unexport-get_mmtask_exe_file.patch
mm-unexport-folio_memcg_unlock.patch
mm-unexport-unlock_page_memcg.patch
