From: Nicholas Bellinger Date: Sat, 28 Oct 2017 03:52:56 +0000 (-0700) Subject: iscsi-target: Fix non-immediate TMR reference leak X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8009209a65167c899729e9a9d40fd3b809474c9d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git iscsi-target: Fix non-immediate TMR reference leak 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 Cc: Hannes Reinecke Signed-off-by: Nicholas Bellinger Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index c32d43d6ccdf..d9ba4ee2c62b 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -2099,12 +2099,14 @@ 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));