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| author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-07-11 00:47:23 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-11 01:32:30 +0200 |
| commit | dbac61a3f2afac562efa51b0a196ed71b6b8d109 (patch) | |
| tree | c9bbf5dd8f0a086143df9908146ea8ece1d9bb28 /mm/memory_hotplug.c | |
| parent | mm, vmscan: avoid thrashing anon lru when free + file is low (diff) | |
| download | linux-dbac61a3f2afac562efa51b0a196ed71b6b8d109.tar.xz linux-dbac61a3f2afac562efa51b0a196ed71b6b8d109.zip | |
mm/memory_hotplug.c: add NULL check to avoid potential NULL pointer dereference
The 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@embeddedor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index f79aac7a12b5..7b1311ac5f7b 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1268,7 +1268,7 @@ register_fail: error: /* rollback pgdat allocation and others */ - if (new_pgdat) + if (new_pgdat && pgdat) rollback_node_hotadd(nid, pgdat); memblock_remove(start, size); |