From 3fc9fb13a4b2576aeab86c62fd64eb29ab68659c Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Fri, 27 Oct 2017 20:52:56 -0700 Subject: iscsi-target: Fix non-immediate TMR reference leak 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 Cc: Hannes Reinecke Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger --- drivers/target/iscsi/iscsi_target.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/target') diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 048d4227327c..3b7bb589d301 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -2094,12 +2094,14 @@ 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(&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)); -- cgit v1.2.3-59-g8ed1b