shost_for_each_device() would skip devices which is in progress of
removing, so scsi_try_bus_device_reset() for these devices would be
skipped in scsi_eh_bus_device_reset() with following order:
T1: T2:scsi_error_handle
__scsi_remove_device
scsi_device_set_state(sdev, SDEV_DEL)
// would skip device with SDEV_DEL state
shost_for_each_device()
scsi_try_bus_device_reset
flush all commands
...
releasing and free scsi_device
Some drivers like smartpqi only implement eh_device_reset_handler,
if device reset is skipped, the commands which had been sent to
firmware or devices hardware are not cleared. The error handle
would flush all these commands in scsi_unjam_host().
When the commands are finished by hardware, use after free issue is
triggered.
Fix this issue by using shost_for_each_device_include_deleted()
to iterate devices in scsi_eh_bus_device_reset().
Signed-off-by: Wenchao Hao <[email protected]>
---
drivers/scsi/scsi_error.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 2550f8cd182a..57e3cc556549 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1568,7 +1568,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
struct scsi_device *sdev;
enum scsi_disposition rtn;
- shost_for_each_device(sdev, shost) {
+ shost_for_each_device_include_deleted(sdev, shost) {
if (scsi_host_eh_past_deadline(shost)) {
SCSI_LOG_ERROR_RECOVERY(3,
sdev_printk(KERN_INFO, sdev,
--
2.32.0