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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-10-27 20:52:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:40:51 +0000 |
| commit | 8009209a65167c899729e9a9d40fd3b809474c9d (patch) | |
| tree | d037a4ba5e29db8ad1bdc53a9138658dcbd6d52d /drivers/target | |
| parent | 84ab17cf4f30740eff6247d2bf657f8ee527b034 (diff) | |
| download | linux-stable-8009209a65167c899729e9a9d40fd3b809474c9d.tar.gz linux-stable-8009209a65167c899729e9a9d40fd3b809474c9d.tar.bz2 linux-stable-8009209a65167c899729e9a9d40fd3b809474c9d.zip | |
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 <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 8 |
1 files changed, 5 insertions, 3 deletions
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)); |