From: Hans de Goede <hdegoede@xxxxxxxxxx>
The scsi error handling path re-uses previously queued up (and errored-out)
cmds. If such a re-used cmd had a data-phase then cmdinfo will have
data_in_urb / data_out_urb still set to the free-ed urbs from the errored-out
cmd, and they will get free-ed a second time when the error handling cmd
completes, corrupting the kernel heap.
Clearing cmdinfo on command queue-ing fixes this, and seems like a good idea
in general.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/storage/uas.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index d81d041842f4..fceffccc1be1 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -684,6 +684,8 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
return SCSI_MLQUEUE_DEVICE_BUSY;
}
+ memset(cmdinfo, 0, sizeof(*cmdinfo));
+
if (blk_rq_tagged(cmnd->request)) {
cmdinfo->stream = cmnd->request->tag + 2;
} else {
--
1.8.5.5
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