| Message ID | 1587731404-29750-1-git-send-email-shengjiu.wang@nxp.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | f3fc1ea011f09156886e8f4beb240ea814f2197a |
| Headers | show |
| Series | ASoC: fsl_easrc: Check NULL pinter before dereference | expand |
On Fri, Apr 24, 2020 at 08:30:04PM +0800, Shengjiu Wang wrote: > The patch 955ac624058f: "ASoC: fsl_easrc: Add EASRC ASoC CPU DAI > drivers" from Apr 16, 2020, leads to the following Smatch complaint: This doesn't apply against current code, please check and resend.
On Fri, 24 Apr 2020 20:30:04 +0800, Shengjiu Wang wrote: > The patch 955ac624058f: "ASoC: fsl_easrc: Add EASRC ASoC CPU DAI > drivers" from Apr 16, 2020, leads to the following Smatch complaint: > > sound/soc/fsl/fsl_easrc.c:1529 fsl_easrc_hw_free() > warn: variable dereferenced before check 'ctx' (see line 1527) > > sound/soc/fsl/fsl_easrc.c > 1526 struct fsl_asrc_pair *ctx = runtime->private_data; > 1527 struct fsl_easrc_ctx_priv *ctx_priv = ctx->private; > ^^^^^ > Dereference > > [...] Applied to https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.8 Thanks! [1/1] ASoC: fsl_easrc: Check for null pointer before dereferencing "ctx" in fsl_easrc_hw_free() commit: f3fc1ea011f09156886e8f4beb240ea814f2197a All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark
diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c index 97658e1f4989..20326bffab64 100644 --- a/sound/soc/fsl/fsl_easrc.c +++ b/sound/soc/fsl/fsl_easrc.c @@ -1524,9 +1524,14 @@ static int fsl_easrc_hw_free(struct snd_pcm_substream *substream, { struct snd_pcm_runtime *runtime = substream->runtime; struct fsl_asrc_pair *ctx = runtime->private_data; - struct fsl_easrc_ctx_priv *ctx_priv = ctx->private; + struct fsl_easrc_ctx_priv *ctx_priv; + + if (!ctx) + return -EINVAL; + + ctx_priv = ctx->private; - if (ctx && (ctx_priv->ctx_streams & BIT(substream->stream))) { + if (ctx_priv->ctx_streams & BIT(substream->stream)) { ctx_priv->ctx_streams &= ~BIT(substream->stream); fsl_easrc_release_context(ctx); }
The patch 955ac624058f: "ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers" from Apr 16, 2020, leads to the following Smatch complaint: sound/soc/fsl/fsl_easrc.c:1529 fsl_easrc_hw_free() warn: variable dereferenced before check 'ctx' (see line 1527) sound/soc/fsl/fsl_easrc.c 1526 struct fsl_asrc_pair *ctx = runtime->private_data; 1527 struct fsl_easrc_ctx_priv *ctx_priv = ctx->private; ^^^^^ Dereference 1528 1529 if (ctx && (ctx_priv->ctx_streams & BIT(substream->stream))) { ^^^ This check is too late, to prevent a NULL dereference. 1530 ctx_priv->ctx_streams &= ~BIT(substream->stream); 1531 fsl_easrc_release_context(ctx); Fixes: 955ac624058f ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> --- sound/soc/fsl/fsl_easrc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)