This is a note to let you know that I've just added the patch titled
rtc: nct3018y: fix possible NULL dereference
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtc-nct3018y-fix-possible-null-dereference.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 89e3337d70ff7f3fa23bc1cfd08eeba8e135f4cb
Author: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Date: Thu Feb 29 23:21:27 2024 +0100
rtc: nct3018y: fix possible NULL dereference
[ Upstream commit babfeb9cbe7ebc657bd5b3e4f9fde79f560b6acc ]
alarm_enable and alarm_flag are allowed to be NULL but will be dereferenced
later by the dev_dbg call.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Closes: https://lore.kernel.org/r/202305180042.DEzW1pSd-lkp@xxxxxxxxx/
Link: https://lore.kernel.org/r/20240229222127.1878176-1-alexandre.belloni@xxxxxxxxxxx
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/rtc/rtc-nct3018y.c b/drivers/rtc/rtc-nct3018y.c
index ed4e606be8e58..c4533c0f53896 100644
--- a/drivers/rtc/rtc-nct3018y.c
+++ b/drivers/rtc/rtc-nct3018y.c
@@ -99,6 +99,8 @@ static int nct3018y_get_alarm_mode(struct i2c_client *client, unsigned char *ala
if (flags < 0)
return flags;
*alarm_enable = flags & NCT3018Y_BIT_AIE;
+ dev_dbg(&client->dev, "%s:alarm_enable:%x\n", __func__, *alarm_enable);
+
}
if (alarm_flag) {
@@ -107,11 +109,9 @@ static int nct3018y_get_alarm_mode(struct i2c_client *client, unsigned char *ala
if (flags < 0)
return flags;
*alarm_flag = flags & NCT3018Y_BIT_AF;
+ dev_dbg(&client->dev, "%s:alarm_flag:%x\n", __func__, *alarm_flag);
}
- dev_dbg(&client->dev, "%s:alarm_enable:%x alarm_flag:%x\n",
- __func__, *alarm_enable, *alarm_flag);
-
return 0;
}
