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| author |   Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2015-04-03 20:20:15 +0900 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2015-04-17 23:28:48 +0530 |
| commit | d7d8e892aa6fe280a2e2974d9fd1ec9253ee1a05 (patch) | |
| tree | 332e18f29948518da896e908c98d781b7b5b734d /drivers/dma/sh | |
| parent | dmaengine: sa11x0: report slave capabilities to upper layers (diff) | |
| download | linux-dev-d7d8e892aa6fe280a2e2974d9fd1ec9253ee1a05.tar.xz linux-dev-d7d8e892aa6fe280a2e2974d9fd1ec9253ee1a05.zip | |
dmaengine: usb-dmac: Fix dereferencing freed memory 'desc'
This patch fixes an issue that the usb_dmac_desc_free() is
dereferencing freed memory 'desc' because it uses list_for_each_entry().
This function should use list_for_each_entry_safe().
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/sh')
| -rw-r--r-- | drivers/dma/sh/usb-dmac.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/sh/usb-dmac.c b/drivers/dma/sh/usb-dmac.c index d5dad98bef0b..f705798ce3eb 100644 --- a/drivers/dma/sh/usb-dmac.c +++ b/drivers/dma/sh/usb-dmac.c @@ -285,13 +285,13 @@ static int usb_dmac_desc_alloc(struct usb_dmac_chan *chan, unsigned int sg_len, static void usb_dmac_desc_free(struct usb_dmac_chan *chan) { - struct usb_dmac_desc *desc; + struct usb_dmac_desc *desc, *_desc; LIST_HEAD(list); list_splice_init(&chan->desc_freed, &list); list_splice_init(&chan->desc_got, &list); - list_for_each_entry(desc, &list, node) { + list_for_each_entry_safe(desc, _desc, &list, node) { list_del(&desc->node); kfree(desc); } |