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authorDan Carpenter <dan.carpenter@oracle.com>2020-05-20 15:00:19 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-05-21 10:58:46 +0200
commite420637b81f78d0fbacf539bdb1b341eba602aea (patch)
tree01a130af1e189fa293284faa5e481478f2e0ade1
parentc9d7e3da1f3c4cf5dddfc5d7ce4d76d013aba1cc (diff)
w1_therm: Free the correct variable
The problem is that we change "p_args" to point to the middle of the string so when we free it at the end of the function it's not freeing the same pointer that we originally allocated. Fixes: e2c94d6f5720 ("w1_therm: adding alarm sysfs entry") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/20200520120019.GA172354@mwanda Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/w1/slaves/w1_therm.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index cc4b88056b33..a6c85e486671 100644
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -1526,8 +1526,9 @@ static ssize_t alarms_store(struct device *device,
int temp, ret = -EINVAL;
char *token = NULL;
s8 tl, th, tt; /* 1 byte per value + temp ring order */
- char *p_args = kmalloc(size, GFP_KERNEL);
+ char *p_args, *orig;
+ p_args = orig = kmalloc(size, GFP_KERNEL);
/* Safe string copys as buf is const */
if (!p_args) {
dev_warn(device,
@@ -1611,7 +1612,7 @@ static ssize_t alarms_store(struct device *device,
free_m:
/* free allocated memory */
- kfree(p_args);
+ kfree(orig);
return size;
}