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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2017-10-31 11:03:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-20 10:01:32 +0100 |
| commit | 8867d3f1bb32ae974c92b76529769d424d32c451 (patch) | |
| tree | 23ae42eadbe701d940c3a6e972b22dc5eb6e368a | |
| parent | 55bae20a7382543719207c84bf9e17487777ced8 (diff) | |
| download | linux-stable-8867d3f1bb32ae974c92b76529769d424d32c451.tar.gz linux-stable-8867d3f1bb32ae974c92b76529769d424d32c451.tar.bz2 linux-stable-8867d3f1bb32ae974c92b76529769d424d32c451.zip | |
target/iscsi: Fix a race condition in iscsit_add_reject_from_cmd()
[ 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@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index f0ace220753e..9582f082152c 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -674,6 +674,7 @@ 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", @@ -704,7 +705,7 @@ 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); } |