From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
There is an exit path where rx is kfree'd on put_ir_rx and then
a jump to label out_put_xx will again kfree it with another
call to put_ir_rx. Fix this by adding a new label that avoids
this 2nd call to put_ir_rx for this specific case.
Detected with CoverityScan, CID#145119 ("Use after free")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/staging/media/lirc/lirc_zilog.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c
index 34aac3e..5dd1e62 100644
--- a/drivers/staging/media/lirc/lirc_zilog.c
+++ b/drivers/staging/media/lirc/lirc_zilog.c
@@ -1597,7 +1597,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
i2c_set_clientdata(client, NULL);
put_ir_rx(rx, true);
ir->l.features &= ~LIRC_CAN_REC_LIRCCODE;
- goto out_put_xx;
+ goto out_put_tx;
}
/* Proceed only if the Tx client is also ready */
@@ -1637,6 +1637,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
out_put_xx:
if (rx != NULL)
put_ir_rx(rx, true);
+out_put_tx:
if (tx != NULL)
put_ir_tx(tx, true);
out_put_ir:
--
2.10.2
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