Re: [PATCH] thermal/lib: Fix memory leak on error in thermal_genl_auto()

From: Lukasz Luba
Date: Thu Oct 24 2024 - 07:06:29 EST


Hi Daniel,

On 10/24/24 11:59, Daniel Lezcano wrote:
The function thermal_genl_auto() does not free the allocated message
in the error path. Fix that by putting a out label and jump to it
which will free the message instead of directly returning an error.

Reported-by: Lukasz Luba <lukasz.luba@xxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
tools/lib/thermal/commands.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tools/lib/thermal/commands.c b/tools/lib/thermal/commands.c
index bcf0f14d035a..b0d4c8aca21c 100644
--- a/tools/lib/thermal/commands.c
+++ b/tools/lib/thermal/commands.c
@@ -375,27 +375,30 @@ static thermal_error_t thermal_genl_auto(struct thermal_handler *th, cmd_cb_t cm
struct cmd_param *param,
int cmd, int flags, void *arg)
{
+ thermal_error_t ret = THERMAL_ERROR;
struct nl_msg *msg;
void *hdr;
msg = nlmsg_alloc();
if (!msg)
- return THERMAL_ERROR;
+ goto out;
hdr = genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, thermal_cmd_ops.o_id,
0, flags, cmd, THERMAL_GENL_VERSION);
if (!hdr)
- return THERMAL_ERROR;
+ goto out;
if (cmd_cb && cmd_cb(msg, param))
- return THERMAL_ERROR;
+ goto out;
if (nl_send_msg(th->sk_cmd, th->cb_cmd, msg, genl_handle_msg, arg))
- return THERMAL_ERROR;
+ goto out;
+ ret = THERMAL_SUCCESS;
+out:
nlmsg_free(msg);
- return THERMAL_SUCCESS;
+ return ret;
}
thermal_error_t thermal_cmd_get_tz(struct thermal_handler *th, struct thermal_zone **tz)

LGTM,

Reviewed-by: Lukasz Luba <lukasz.luba@xxxxxxx>

Regards,
Lukasz