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| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-07-05 11:26:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-08 15:42:55 +0200 |
| commit | 82f76a4a720791d889de775b5f7541d601efc8bd (patch) | |
| tree | 6d137dfd82e8f36f39bbd80a9a1197103bc49d8f | |
| parent | 086c28ab7c5699256aced0049aae9c42f1410313 (diff) | |
| download | linux-82f76a4a720791d889de775b5f7541d601efc8bd.tar.bz2 | |
intel_th: msu-sink: Potential dereference of null pointer
The return value of dma_alloc_coherent() needs to be checked.
To avoid use of null pointer in sg_set_buf() in case of the failure of
alloc.
Fixes: f220df66f676 ("intel_th: msu-sink: An example msu buffer "sink"")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20220705082637.59979-3-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hwtracing/intel_th/msu-sink.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hwtracing/intel_th/msu-sink.c b/drivers/hwtracing/intel_th/msu-sink.c index 2c7f5116be12..891b28ea25fe 100644 --- a/drivers/hwtracing/intel_th/msu-sink.c +++ b/drivers/hwtracing/intel_th/msu-sink.c @@ -71,6 +71,9 @@ static int msu_sink_alloc_window(void *data, struct sg_table **sgt, size_t size) block = dma_alloc_coherent(priv->dev->parent->parent, PAGE_SIZE, &sg_dma_address(sg_ptr), GFP_KERNEL); + if (!block) + return -ENOMEM; + sg_set_buf(sg_ptr, block, PAGE_SIZE); } |