diff options
| author | Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> | 2014-10-03 19:06:03 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-15 12:05:31 +0200 |
| commit | ceb0e516b853d814901731cc83fdfaeb7dd6941a (patch) | |
| tree | a75eb77425b039866ae2870439fbfc979bf1eca9 | |
| parent | 776c2868cbe4494e76adad43e123e8cd1fd1657f (diff) | |
driver/base/node: remove unnecessary kfree of node struct from unregister_one_node
commit 33ead538f642a33b1d658782a5d14a40b5014d1f upstream.
Commit 92d585ef067d ("numa: fix NULL pointer access and memory
leak in unregister_one_node()") added kfree() of node struct in
unregister_one_node(). But node struct is freed by node_device_release()
which is called in unregister_node(). So by adding the kfree(),
node struct is freed two times.
While hot removing memory, the commit leads the following BUG_ON():
kernel BUG at mm/slub.c:3346!
invalid opcode: 0000 [#1] SMP
[...]
Call Trace:
[...] unregister_one_node
[...] try_offline_node
[...] remove_memory
[...] acpi_memory_device_remove
[...] acpi_bus_trim
[...] acpi_bus_trim
[...] acpi_device_hotplug
[...] acpi_hotplug_work_fn
[...] process_one_work
[...] worker_thread
[...] ? rescuer_thread
[...] kthread
[...] ? kthread_create_on_node
[...] ret_from_fork
[...] ? kthread_create_on_node
This patch removes unnecessary kfree() from unregister_one_node().
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Fixes: 92d585ef067d "numa: fix NULL pointer access and memory leak in unregister_one_node()"
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/base/node.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c index 8f7ed9933a7c..40e4585f110a 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -603,7 +603,6 @@ void unregister_one_node(int nid) return; unregister_node(node_devices[nid]); - kfree(node_devices[nid]); node_devices[nid] = NULL; } |