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authorQuinn Tran <quinn.tran@qlogic.com>2014-09-25 06:22:28 -0400
committerNicholas Bellinger <nab@linux-iscsi.org>2014-10-01 14:39:30 -0700
commit082f58ac4a48d3f5cb4597232cb2ac6823a96f43 (patch)
tree8a71ac3e9bc7102202e0a1cd5a1c8ff2410a4598 /drivers/target
parentdb3a99b9921f27fe71ca8c0f218ee810e0e7fb69 (diff)
target: Fix queue full status NULL pointer for SCF_TRANSPORT_TASK_SENSE
During temporary resource starvation at lower transport layer, command is placed on queue full retry path, which expose this problem. The TCM queue full handling of SCF_TRANSPORT_TASK_SENSE currently sends the same cmd twice to lower layer. The 1st time led to cmd normal free path. The 2nd time cause Null pointer access. This regression bug was originally introduced v3.1-rc code in the following commit: commit e057f53308a5f071556ee80586b99ee755bf07f5 Author: Christoph Hellwig <hch@infradead.org> Date: Mon Oct 17 13:56:41 2011 -0400 target: remove the transport_qf_callback se_cmd callback Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: <stable@vger.kernel.org> # v3.1+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_transport.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 115632ee3ec8..9700ea125268 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1871,8 +1871,7 @@ static void transport_complete_qf(struct se_cmd *cmd)
if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
trace_target_cmd_complete(cmd);
ret = cmd->se_tfo->queue_status(cmd);
- if (ret)
- goto out;
+ goto out;
}
switch (cmd->data_direction) {