loopback: Fix memory leak in tcm_loop_make_scsi_hba()

There is a memory leak in tcm_loop_make_scsi_hba().

If all the strstr() calls return NULL and we end up at return ERR_PTR(-EINVAL);
then we'll be leaking the memory previously allocated to tl_hba as
that variable goes out of scope.

This patch should fix the leak.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index e53cec64ddd40c30eb6c9147929f804a7e91ac81..fe11a336b598d6ff4387aa1561f4f78620f9b770 100644 (file)
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -1288,22 +1288,21 @@ struct se_wwn *tcm_loop_make_scsi_hba(
                goto check_len;
        }
        ptr = strstr(name, "iqn.");
-       if (ptr) {
-               tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI;
-               goto check_len;
+       if (!ptr) {
+               printk(KERN_ERR "Unable to locate prefix for emulated Target "
+                               "Port: %s\n", name);
+               ret = -EINVAL;
+               goto out;
        }
-
-       printk(KERN_ERR "Unable to locate prefix for emulated Target Port:"
-                       " %s\n", name);
-       return ERR_PTR(-EINVAL);
+       tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI;
 
 check_len:
        if (strlen(name) >= TL_WWN_ADDR_LEN) {
                printk(KERN_ERR "Emulated NAA %s Address: %s, exceeds"
                        " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba),
                        TL_WWN_ADDR_LEN);
-               kfree(tl_hba);
-               return ERR_PTR(-EINVAL);
+               ret = -EINVAL;
+               goto out;
        }
        snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]);