| Date | Fri, 30 Mar 2012 12:49:41 -0700 | From | Greg KH <> | Subject | [ 068/149] tcm_fc: Fix fc_exch memory leak in ft_send_resp_status |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Nicholas Bellinger <nab@linux-iscsi.org>
commit 031ed4d565b31880a4136bb7366bc89f5b1dba7d upstream.
This patch fixes a bug in tcm_fc where fc_exch memory from fc_exch_mgr->ep_pool is currently being leaked by ft_send_resp_status() usage. Following current code in ft_queue_status() response path, using lport->tt.seq_send() needs to be followed by a lport->tt.exch_done() in order to release fc_exch memory back into libfc_em kmem_cache.
ft_send_resp_status() code is currently used in pre submit se_cmd ft_send_work() error exceptions, TM request setup exceptions, and main TM response callback path in ft_queue_tm_resp(). This bugfix addresses the leak in these cases.
Cc: Mark D Rustad <mark.d.rustad@intel.com> Cc: Kiran Patil <kiran.patil@intel.com> Cc: Robert Love <robert.w.love@intel.com> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/target/tcm_fc/tfc_cmd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/target/tcm_fc/tfc_cmd.c +++ b/drivers/target/tcm_fc/tfc_cmd.c @@ -329,10 +329,12 @@ static void ft_send_resp_status(struct f fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0); sp = fr_seq(fp); - if (sp) + if (sp) { lport->tt.seq_send(lport, sp, fp); - else + lport->tt.exch_done(sp); + } else { lport->tt.frame_send(lport, fp); + } } /*
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