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mei: fix krealloc() misuse in in mei_cl_irq_read_msg()

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If krealloc() returns NULL, it doesn't free the original. So any code
of the form 'foo = krealloc(foo, ...);' is almost certainly a bug.

Introduced by commit fcb136e1ac5774909e0d85189f721b8dfa800e0f(mei: fix
reading large reposnes)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yongjun 2013-04-23 10:44:35 +08:00 committed by Greg Kroah-Hartman
parent 7013539381
commit 46e407dd34
1 changed files with 5 additions and 5 deletions
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10
drivers/misc/mei/interrupt.c
View File

@ -148,16 +148,16 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n",
cb->response_buffer.size,
mei_hdr->length, cb->buf_idx);
cb->response_buffer.data =
krealloc(cb->response_buffer.data,
mei_hdr->length + cb->buf_idx,
GFP_KERNEL);
buffer = krealloc(cb->response_buffer.data,
mei_hdr->length + cb->buf_idx,
GFP_KERNEL);
if (!cb->response_buffer.data) {
if (!buffer) {
dev_err(&dev->pdev->dev, "allocation failed.\n");
list_del(&cb->list);
return -ENOMEM;
}
cb->response_buffer.data = buffer;
cb->response_buffer.size =
mei_hdr->length + cb->buf_idx;
}