This is a note to let you know that I've just added the patch titled scsi: sg: add sg_remove_request in sg_write to the 5.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-sg-add-sg_remove_request-in-sg_write.patch and it can be found in the queue-5.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit ad5d0e6bfbbbfa6ed179cf83fce9415f5530e2e8 Author: Wu Bo <wubo40@xxxxxxxxxx> Date: Tue Apr 14 10:13:28 2020 +0800 scsi: sg: add sg_remove_request in sg_write [ Upstream commit 83c6f2390040f188cc25b270b4befeb5628c1aee ] If the __copy_from_user function failed we need to call sg_remove_request in sg_write. Link: https://lore.kernel.org/r/610618d9-e983-fd56-ed0f-639428343af7@xxxxxxxxxx Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> Signed-off-by: Wu Bo <wubo40@xxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 9c0ee192f0f9c..20472aaaf630a 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -685,8 +685,10 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) hp->flags = input_size; /* structure abuse ... */ hp->pack_id = old_hdr.pack_id; hp->usr_ptr = NULL; - if (copy_from_user(cmnd, buf, cmd_size)) + if (copy_from_user(cmnd, buf, cmd_size)) { + sg_remove_request(sfp, srp); return -EFAULT; + } /* * SG_DXFER_TO_FROM_DEV is functionally equivalent to SG_DXFER_FROM_DEV, * but is is possible that the app intended SG_DXFER_TO_DEV, because there