Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Sun, 11 Feb 2018 04:31:11 +0000 | Subject | [PATCH 3.16 066/136] iscsi-target: Fix non-immediate TMR reference leak |
| |
3.16.54-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Bellinger <nab@linux-iscsi.org>
commit 3fc9fb13a4b2576aeab86c62fd64eb29ab68659c upstream.
This patch fixes a se_cmd->cmd_kref reference leak that can occur when a non immediate TMR is proceeded our of command sequence number order, and CMDSN_LOWER_THAN_EXP is returned by iscsit_sequence_cmd().
To address this bug, call target_put_sess_cmd() during this special case following what iscsit_process_scsi_cmd() does upon CMDSN_LOWER_THAN_EXP.
Cc: Mike Christie <mchristi@redhat.com> Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> [bwh: Backported to 3.16: target_put_sess_cmd() takes an se_session pointer too] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/target/iscsi/iscsi_target.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1917,12 +1917,14 @@ attach: if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); - if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) + if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) { out_of_order_cmdsn = 1; - else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) + } else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); return 0; - else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { return -1; + } } iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
| |