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target: Fix reference leak in target_get_sess_cmd() error path

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This patch fixes a se_cmd->cmd_kref leak buf when se_sess->sess_tearing_down
is true within target_get_sess_cmd() submission path code.

This se_cmd reference leak can occur during active session shutdown when
ack_kref=1 is passed by target_submit_cmd_[map_sgls,tmr]() callers.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: <stable@vger.kernel.org> # 3.6+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Bart Van Assche
2015-02-18 15:33:58 +01:00
committed by Nicholas Bellinger
parent 2f450cc1fb
commit 7544e59734
1 changed files with 4 additions and 0 deletions
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drivers/target/target_core_transport.c
+4
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@@ -2389,6 +2389,10 @@ int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd,
list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
out:
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
if (ret && ack_kref)
target_put_sess_cmd(se_sess, se_cmd);
return ret;
}
EXPORT_SYMBOL(target_get_sess_cmd);