From: Saravanan Vajravel saravanan.vajravel@broadcom.com
[ Upstream commit 699826f4e30ab76a62c238c86fbef7e826639c8d ]
The ib_isert module is releasing the isert connection both in isert_wait_conn() handler as well as isert_free_conn() handler. In isert_wait_conn() handler, it is expected to wait for iSCSI session logout operation to complete. It should free the isert connection only in isert_free_conn() handler.
When a bunch of iSER target is cleared, this issue can lead to use-after-free memory issue as isert conn is twice released
Fixes: b02efbfc9a05 ("iser-target: Fix implicit termination of connections") Reviewed-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Saravanan Vajravel saravanan.vajravel@broadcom.com Signed-off-by: Selvin Xavier selvin.xavier@broadcom.com Link: https://lore.kernel.org/r/20230606102531.162967-4-saravanan.vajravel@broadco... Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/ulp/isert/ib_isert.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index ed375f517e8ac..7cd90604502ec 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -2560,8 +2560,6 @@ static void isert_wait_conn(struct iscsi_conn *conn) isert_put_unsol_pending_cmds(conn); isert_wait4cmds(conn); isert_wait4logout(isert_conn); - - queue_work(isert_release_wq, &isert_conn->release_work); }
static void isert_free_conn(struct iscsi_conn *conn)