The patch titled
Subject: mm/mempolicy.c: check parameters first in kernel_get_mempolicy
has been added to the -mm tree. Its filename is
mm-mempolicy-check-parameters-first-in-kernel_get_mempolicy.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mempolicy-check-parameters-first-in-kernel_get_mempolicy.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mempolicy-check-parameters-first-in-kernel_get_mempolicy.patch
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From: Wenchao Hao <haowenchao22@xxxxxxxxx>
Subject: mm/mempolicy.c: check parameters first in kernel_get_mempolicy
Previous implementatoin calls untagged_addr() before error check, while if
the error check failed and return EINVAL, the untagged_addr() call is just
useless work.
Link: http://lkml.kernel.org/r/20200801090825.5597-1-haowenchao22@xxxxxxxxx
Signed-off-by: Wenchao Hao <haowenchao22@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/mempolicy.c~mm-mempolicy-check-parameters-first-in-kernel_get_mempolicy
+++ a/mm/mempolicy.c
@@ -1632,11 +1632,11 @@ static int kernel_get_mempolicy(int __us
int uninitialized_var(pval);
nodemask_t nodes;
- addr = untagged_addr(addr);
-
if (nmask != NULL && maxnode < nr_node_ids)
return -EINVAL;
+ addr = untagged_addr(addr);
+
err = do_get_mempolicy(&pval, &nodes, addr, flags);
if (err)
_
Patches currently in -mm which might be from haowenchao22@xxxxxxxxx are
mm-mempolicy-check-parameters-first-in-kernel_get_mempolicy.patch
