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| author | Julia Lawall <julia@diku.dk> | 2010-05-27 14:33:17 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-07-01 02:27:35 -0700 |
| commit | 485680050166dc8c6ac976346430ab1f453c228b (patch) | |
| tree | ee1400398cb1f88dcb975715e16dfa525db9cecf | |
| parent | efcc28981745bc6aca88acb2d4d37d87f090a80a (diff) | |
| download | kernel_samsung_smdk4412-485680050166dc8c6ac976346430ab1f453c228b.zip kernel_samsung_smdk4412-485680050166dc8c6ac976346430ab1f453c228b.tar.gz kernel_samsung_smdk4412-485680050166dc8c6ac976346430ab1f453c228b.tar.bz2 | |
drivers/dma: Eliminate a NULL pointer dereference
If td_desc is NULL, just skip both kfrees.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@
if ((E == NULL && ...) || ...)
{
... when != if (...) S1 else S2
when != E = E1
* E->f
... when any
return ...;
}
else S3
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | drivers/dma/timb_dma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c index 464fad5..2ec1ed5 100644 --- a/drivers/dma/timb_dma.c +++ b/drivers/dma/timb_dma.c @@ -382,7 +382,7 @@ static struct timb_dma_desc *td_alloc_init_desc(struct timb_dma_chan *td_chan) td_desc = kzalloc(sizeof(struct timb_dma_desc), GFP_KERNEL); if (!td_desc) { dev_err(chan2dev(chan), "Failed to alloc descriptor\n"); - goto err; + goto out; } td_desc->desc_list_len = td_chan->desc_elems * TIMB_DMA_DESC_SIZE; @@ -410,7 +410,7 @@ static struct timb_dma_desc *td_alloc_init_desc(struct timb_dma_chan *td_chan) err: kfree(td_desc->desc_list); kfree(td_desc); - +out: return NULL; } |