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Subject[PATCH] scsi:sg: add sg_remove_request in sg_write
Date
From: Wu Bo <wubo40@huawei.com>

If the __copy_from_user function return failed,
it should call sg_remove_request in sg_write.

Signed-off-by: Wu Bo <wubo40@huawei.com>
---
drivers/scsi/sg.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 4e6af59..ff3f532 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -685,8 +685,10 @@ static int get_sg_io_pack_id(int *pack_id, void
__user *buf, size_t count)
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
--
1.8.3.1
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