From: Bart Van Assche bart.vanassche@wdc.com
This patch has been added to the stable tree. If you have any objections, please let us know.
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[ Upstream commit cfe2b621bb18d86e93271febf8c6e37622da2d14 ]
Avoid that cmd->se_cmd.se_tfo is read after a command has already been freed.
Signed-off-by: Bart Van Assche bart.vanassche@wdc.com Cc: Christoph Hellwig hch@lst.de Cc: Mike Christie mchristi@redhat.com Reviewed-by: Hannes Reinecke hare@suse.com Signed-off-by: Nicholas Bellinger nab@linux-iscsi.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/target/iscsi/iscsi_target.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 8df1ff3766c4..2d6b0cf0929e 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -682,6 +682,7 @@ static int iscsit_add_reject_from_cmd( unsigned char *buf) { struct iscsi_conn *conn; + const bool do_put = cmd->se_cmd.se_tfo != NULL;
if (!cmd->conn) { pr_err("cmd->conn is NULL for ITT: 0x%08x\n", @@ -712,7 +713,7 @@ static int iscsit_add_reject_from_cmd( * Perform the kref_put now if se_cmd has already been setup by * scsit_setup_scsi_cmd() */ - if (cmd->se_cmd.se_tfo != NULL) { + if (do_put) { pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); target_put_sess_cmd(&cmd->se_cmd); }