This is a note to let you know that I've just added the patch titled
iscsi-target: Fix ImmediateData=Yes failure regression in >= v3.10
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iscsi-target-fix-immediatedata-yes-failure-regression-in-v3.10.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9d86a2befceb06ee83c1a588915e6d6e0abef797 Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Thu, 22 Aug 2013 00:05:45 -0700
Subject: iscsi-target: Fix ImmediateData=Yes failure regression in >= v3.10
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
commit 9d86a2befceb06ee83c1a588915e6d6e0abef797 upstream.
This patch addresses a regression bug within ImmediateData=Yes failure
handling that ends up triggering an OOPs within >= v3.10 iscsi-target
code.
The problem occurs when iscsit_process_scsi_cmd() does the call to
target_put_sess_cmd(), and once again in iscsit_get_immediate_data()
that is triggered during two different cases:
- When iscsit_sequence_cmd() returns CMDSN_LOWER_THAN_EXP, for which
the descriptor state will already have been set to ISTATE_REMOVE
by iscsit_sequence_cmd(), and
- When iscsi_cmd->sense_reason is set, for which iscsit_execute_cmd()
will have already called transport_send_check_condition_and_sense()
to queue the exception response.
It changes iscsit_process_scsi_cmd() to drop the early call, and makes
iscsit_get_immediate_data() call target_put_sess_cmd() from a single
location after dumping the immediate data for the failed command.
The regression was initially introduced in commit:
commit 561bf15892375597ee59d473a704a3e634c4f311
Author: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Wed Jul 3 03:58:58 2013 -0700
iscsi-target: Fix iscsit_sequence_cmd reject handling for iser
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1086,7 +1086,6 @@ int iscsit_process_scsi_cmd(struct iscsi
if (cmd->reject_reason)
return 0;
- target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd);
return 1;
}
/*
@@ -1124,14 +1123,10 @@ after_immediate_data:
*/
cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd,
(unsigned char *)hdr, hdr->cmdsn);
- if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) {
+ if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
return -1;
- } else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
- target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd);
- return 0;
- }
- if (cmd->sense_reason) {
+ if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
int rc;
rc = iscsit_dump_data_payload(cmd->conn,
Patches currently in stable-queue which might be from nab@xxxxxxxxxxxxxxx are
queue-3.10/target-fix-trailing-ascii-space-usage-in-inquiry-vendor-model.patch
queue-3.10/iscsi-target-fix-iscsit_transport-reference-leak-during-np-thread-reset.patch
queue-3.10/iscsi-target-fix-immediatedata-yes-failure-regression-in-v3.10.patch
queue-3.10/iscsi-target-fix-potential-null-pointer-in-solicited-nopout-reject.patch
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