From: Yizhuo <yzhai003@ucr.edu> To: unlisted-recipients:; (no To-header on input) Cc: csong@cs.ucr.edu, zhiyunq@cs.ucr.edu, Yizhuo <yzhai003@ucr.edu>, Bard Liao <bardliao@realtek.com>, Oder Chiou <oder_chiou@realtek.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH] Variable "val" in function rt274_i2c_probe() could be uninitialized Date: Thu, 3 Jan 2019 13:59:12 -0800 [thread overview] Message-ID: <20190103215912.6071-1-yzhai003@ucr.edu> (raw) Inside function rt274_i2c_probe(), if regmap_read() function returns -EINVAL, then local variable "val" leaves uninitialized but used in if statement. This is potentially unsafe. Signed-off-by: Yizhuo <yzhai003@ucr.edu> --- sound/soc/codecs/rt274.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/rt274.c b/sound/soc/codecs/rt274.c index 8f92e5c4dd9d..cd048df76232 100644 --- a/sound/soc/codecs/rt274.c +++ b/sound/soc/codecs/rt274.c @@ -1128,8 +1128,11 @@ static int rt274_i2c_probe(struct i2c_client *i2c, return ret; } - regmap_read(rt274->regmap, + ret = regmap_read(rt274->regmap, RT274_GET_PARAM(AC_NODE_ROOT, AC_PAR_VENDOR_ID), &val); + if (ret) + return ret; + if (val != RT274_VENDOR_ID) { dev_err(&i2c->dev, "Device with ID register %#x is not rt274\n", val); -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Yizhuo <yzhai003@ucr.edu> Cc: csong@cs.ucr.edu, zhiyunq@cs.ucr.edu, Yizhuo <yzhai003@ucr.edu>, Bard Liao <bardliao@realtek.com>, Oder Chiou <oder_chiou@realtek.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH] Variable "val" in function rt274_i2c_probe() could be uninitialized Date: Thu, 3 Jan 2019 13:59:12 -0800 [thread overview] Message-ID: <20190103215912.6071-1-yzhai003@ucr.edu> (raw) Inside function rt274_i2c_probe(), if regmap_read() function returns -EINVAL, then local variable "val" leaves uninitialized but used in if statement. This is potentially unsafe. Signed-off-by: Yizhuo <yzhai003@ucr.edu> --- sound/soc/codecs/rt274.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/rt274.c b/sound/soc/codecs/rt274.c index 8f92e5c4dd9d..cd048df76232 100644 --- a/sound/soc/codecs/rt274.c +++ b/sound/soc/codecs/rt274.c @@ -1128,8 +1128,11 @@ static int rt274_i2c_probe(struct i2c_client *i2c, return ret; } - regmap_read(rt274->regmap, + ret = regmap_read(rt274->regmap, RT274_GET_PARAM(AC_NODE_ROOT, AC_PAR_VENDOR_ID), &val); + if (ret) + return ret; + if (val != RT274_VENDOR_ID) { dev_err(&i2c->dev, "Device with ID register %#x is not rt274\n", val); -- 2.17.1
next reply other threads:[~2019-01-03 21:59 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-03 21:59 Yizhuo [this message] 2019-01-03 21:59 ` [PATCH] Variable "val" in function rt274_i2c_probe() could be uninitialized Yizhuo 2019-01-04 13:49 ` Mark Brown 2019-01-04 13:49 ` Mark Brown
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190103215912.6071-1-yzhai003@ucr.edu \ --to=yzhai003@ucr.edu \ --cc=alsa-devel@alsa-project.org \ --cc=bardliao@realtek.com \ --cc=broonie@kernel.org \ --cc=csong@cs.ucr.edu \ --cc=lgirdwood@gmail.com \ --cc=linux-kernel@vger.kernel.org \ --cc=oder_chiou@realtek.com \ --cc=perex@perex.cz \ --cc=tiwai@suse.com \ --cc=zhiyunq@cs.ucr.edu \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.