The patch titled
Subject: mm/memory.c: check return value of ioremap_prot
has been added to the -mm tree. Its filename is
mm-bugfix-check-return-value-of-ioremap_prot.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-bugfix-check-return-value-of-ioremap_prot.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-bugfix-check-return-value-of-ioremap_prot.patch
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------------------------------------------------------
From: chen jie <chen jie@chenjie6@xxxxxxxxx>
Subject: mm/memory.c: check return value of ioremap_prot
ioremap_prot() can return NULL which could lead to an oops.
Link: http://lkml.kernel.org/r/1533195441-58594-1-git-send-email-chenjie6@xxxxxxxxxx
Signed-off-by: chen jie <chenjie6@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Li Zefan <lizefan@xxxxxxxxxx>
Cc: chenjie <chenjie6@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 3 +++
1 file changed, 3 insertions(+)
--- a/mm/memory.c~mm-bugfix-check-return-value-of-ioremap_prot
+++ a/mm/memory.c
@@ -4401,6 +4401,9 @@ int generic_access_phys(struct vm_area_s
return -EINVAL;
maddr = ioremap_prot(phys_addr, PAGE_ALIGN(len + offset), prot);
+ if (!maddr)
+ return -ENOMEM;
+
if (write)
memcpy_toio(maddr + offset, buf, len);
else
_
Patches currently in -mm which might be from chenjie6@xxxxxxxxxx are
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