summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorBart Van Assche <bart.vanassche@wdc.com>2017-10-31 19:03:17 +0100
committerNicholas Bellinger <nab@linux-iscsi.org>2017-11-04 23:16:06 +0100
commitcfe2b621bb18d86e93271febf8c6e37622da2d14 (patch)
tree1abe89ba7926820e4b7edaf7934933311759ee9a /drivers
parenttarget/iscsi: Modify iscsit_do_crypto_hash_buf() prototype (diff)
downloadlinux-cfe2b621bb18d86e93271febf8c6e37622da2d14.tar.xz
linux-cfe2b621bb18d86e93271febf8c6e37622da2d14.zip
target/iscsi: Fix a race condition in iscsit_add_reject_from_cmd()
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/target/iscsi/iscsi_target.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 91fbada7cdc2..541f66a875fc 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -833,6 +833,7 @@ 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",
@@ -863,7 +864,7 @@ 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);
}