diff options
| author | Nilesh Javali <njavali@marvell.com> | 2020-09-08 02:56:52 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-09-08 22:40:21 -0400 |
| commit | 28b35d17f9f8573d4646dd8df08917a4076a6b63 (patch) | |
| tree | b20c5c823cc7da3823814cd456195c94284eebd1 /drivers/scsi/qedi | |
| parent | 5c35e46465665e2864b2f76675306bf06e0b8703 (diff) | |
scsi: qedi: Fix list_del corruption while removing active I/O
While aborting the I/O, the firmware cleanup task timed out and driver
deleted the I/O from active command list. Some time later the firmware
sent the cleanup task response and driver again deleted the I/O from
active command list causing firmware to send completion for non-existent
I/O and list_del corruption of active command list.
Add fix to check if I/O is present before deleting it from the active
command list to ensure firmware sends valid I/O completion and protect
against list_del corruption.
Link: https://lore.kernel.org/r/20200908095657.26821-4-mrangankar@marvell.com
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qedi')
| -rw-r--r-- | drivers/scsi/qedi/qedi_fw.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/scsi/qedi/qedi_fw.c b/drivers/scsi/qedi/qedi_fw.c index 6ed74583b1b9..34c477bda8a4 100644 --- a/drivers/scsi/qedi/qedi_fw.c +++ b/drivers/scsi/qedi/qedi_fw.c @@ -816,8 +816,11 @@ static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi, qedi_clear_task_idx(qedi_conn->qedi, rtid); spin_lock(&qedi_conn->list_lock); - list_del_init(&dbg_cmd->io_cmd); - qedi_conn->active_cmd_count--; + if (likely(dbg_cmd->io_cmd_in_list)) { + dbg_cmd->io_cmd_in_list = false; + list_del_init(&dbg_cmd->io_cmd); + qedi_conn->active_cmd_count--; + } spin_unlock(&qedi_conn->list_lock); qedi_cmd->state = CLEANUP_RECV; wake_up_interruptible(&qedi_conn->wait_queue); @@ -1235,6 +1238,7 @@ int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn, qedi_conn->cmd_cleanup_req++; qedi_iscsi_cleanup_task(ctask, true); + cmd->io_cmd_in_list = false; list_del_init(&cmd->io_cmd); qedi_conn->active_cmd_count--; QEDI_WARN(&qedi->dbg_ctx, @@ -1446,8 +1450,11 @@ ldel_exit: spin_unlock_bh(&qedi_conn->tmf_work_lock); spin_lock(&qedi_conn->list_lock); - list_del_init(&cmd->io_cmd); - qedi_conn->active_cmd_count--; + if (likely(cmd->io_cmd_in_list)) { + cmd->io_cmd_in_list = false; + list_del_init(&cmd->io_cmd); + qedi_conn->active_cmd_count--; + } spin_unlock(&qedi_conn->list_lock); clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); |