The patch titled
Subject: mm/memory_hotplug.c: add NULL check to avoid potential NULL pointer dereference
has been added to the -mm tree. Its filename is
mm-add-null-check-to-avoid-potential-null-pointer-dereference.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-add-null-check-to-avoid-potential-null-pointer-dereference.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-add-null-check-to-avoid-potential-null-pointer-dereference.patch
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------------------------------------------------------
From: "Gustavo A. R. Silva" <garsilva@xxxxxxxxxxxxxx>
Subject: mm/memory_hotplug.c: add NULL check to avoid potential NULL pointer dereference
NULL check at line 1226: if (!pgdat), implies that pointer pgdat
might be NULL.
rollback_node_hotadd() dereferences this pointer. Add NULL check to avoid
a potential NULL pointer dereference.
Addresses-Coverity-ID: 1369133
Link: http://lkml.kernel.org/r/20170530212436.GA6195@embeddedgus
Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/memory_hotplug.c~mm-add-null-check-to-avoid-potential-null-pointer-dereference mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-add-null-check-to-avoid-potential-null-pointer-dereference
+++ a/mm/memory_hotplug.c
@@ -1273,7 +1273,7 @@ register_fail:
error:
/* rollback pgdat allocation and others */
- if (new_pgdat)
+ if (new_pgdat && pgdat)
rollback_node_hotadd(nid, pgdat);
memblock_remove(start, size);
_
Patches currently in -mm which might be from garsilva@xxxxxxxxxxxxxx are
mm-add-null-check-to-avoid-potential-null-pointer-dereference.patch
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