From: Hans de Goede Date: Thu, 14 Nov 2013 10:06:13 +0000 (+0100) Subject: uas: Clear cmdinfo on command queue-ing X-Git-Tag: v3.15-rc1~137^2~26^2~12 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=3a4462e0e2fe8f715f54147d36b5433a7ff5a85a;p=linux.git uas: Clear cmdinfo on command queue-ing 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 Signed-off-by: Sarah Sharp --- 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 {