Commit 7f54ab5f authored by Nicholas Bellinger's avatar Nicholas Bellinger

target: Drop incorrect ABORT_TASK put for completed commands

This patch fixes a recent ABORT_TASK regression associated
with commit febe562c, where a left-over target_put_sess_cmd()
would still be called when __target_check_io_state() detected
a command has already been completed, and explicit ABORT must
be avoided.

Note commit febe562c dropped the local kref_get_unless_zero()
check in core_tmr_abort_task(), but did not drop this extra
corresponding target_put_sess_cmd() in the failure path.

So go ahead and drop this now bogus target_put_sess_cmd(),
and avoid this potential use-after-free.
Reported-by: default avatarDan Lane <dracodan@gmail.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 81f70ba2
...@@ -177,7 +177,6 @@ void core_tmr_abort_task( ...@@ -177,7 +177,6 @@ void core_tmr_abort_task(
if (!__target_check_io_state(se_cmd, se_sess, 0)) { if (!__target_check_io_state(se_cmd, se_sess, 0)) {
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
target_put_sess_cmd(se_cmd);
goto out; goto out;
} }
list_del_init(&se_cmd->se_cmd_list); list_del_init(&se_cmd->se_cmd_list);
......
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