From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-scsi@vger.kernel.org
Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com,
hare@suse.de, bvanassche@acm.org, hch@infradead.org
Subject: [PATCH v4 21/22] sg: warn v3 write system call users
Date: Wed, 28 Aug 2019 22:26:58 -0400 [thread overview]
Message-ID: <20190829022659.23130-22-dgilbert@interlog.com> (raw)
In-Reply-To: <20190829022659.23130-1-dgilbert@interlog.com>
Should generate one log message per kernel run when the write()
system call is used with the sg interface version 3. Due to
security concerns suggest that they use ioctl(SG_SUBMIT_v3)
instead.
Sg interface version 1 or 2 based code may also be calling
write() in this context. There is no easy solution for them
(short of upgrading their interface to version 3 or 4), so
don't produce a warning suggesting the conversion will be
simple.
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
---
drivers/scsi/sg.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 2620f4079474..9b320a46f024 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -619,6 +619,9 @@ sg_write(struct file *filp, const char __user *p, size_t count, loff_t *ppos)
__func__);
return -EPERM;
}
+ WARN_ONCE(true, "Please use %s instead of write(),\n%s\n",
+ "ioctl(SG_SUBMIT_V3)",
+ " See: http://sg.danny.cz/sg/sg_v40.html");
memcpy(h3p, ohp, SZ_SG_HEADER);
if (__copy_from_user(h3u8p + SZ_SG_HEADER, p + SZ_SG_HEADER,
SZ_SG_IO_HDR - SZ_SG_HEADER))
--
2.23.0
next prev parent reply other threads:[~2019-08-29 2:27 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-29 2:26 [PATCH v4 00/22] sg: add v4 interface Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 01/22] sg: move functions around Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 02/22] sg: remove typedefs, type+formatting cleanup Douglas Gilbert
2019-08-29 7:36 ` Johannes Thumshirn
2019-08-29 2:26 ` [PATCH v4 03/22] sg: sg_log and is_enabled Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 04/22] sg: rework sg_poll(), minor changes Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 05/22] sg: bitops in sg_device Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 06/22] sg: make open count an atomic Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 07/22] sg: move header to uapi section Douglas Gilbert
2019-08-29 11:15 ` kbuild test robot
2019-08-29 15:47 ` Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 08/22] sg: speed sg_poll and sg_get_num_waiting Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 09/22] sg: sg_allow_if_err_recovery and renames Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 10/22] sg: remove access_ok functions Douglas Gilbert
2019-09-09 14:55 ` Hannes Reinecke
2019-08-29 2:26 ` [PATCH v4 11/22] sg: replace rq array with lists Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 12/22] sg: sense buffer rework Douglas Gilbert
2019-09-09 15:01 ` Hannes Reinecke
2019-09-09 18:37 ` Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 13/22] sg: add sg v4 interface support Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 14/22] sg: rework debug info Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 15/22] sg: add 8 byte SCSI LUN to sg_scsi_id Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 16/22] sg: expand sg_comm_wr_t Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 17/22] sg: add sg_iosubmit_v3 and sg_ioreceive_v3 ioctls Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 18/22] sg: add some __must_hold macros Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 19/22] sg: move procfs objects to avoid forward decls Douglas Gilbert
2019-08-29 2:26 ` [PATCH v4 20/22] sg: first debugfs support Douglas Gilbert
2019-08-29 2:26 ` Douglas Gilbert [this message]
2019-08-29 2:26 ` [PATCH v4 22/22] sg: bump version to 4.0.03 Douglas Gilbert
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