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.
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
---
drivers/scsi/sg.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 806bb950cc8a..1255e698f2e0 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -645,6 +645,9 @@ sg_write(struct file *filp, const char __user *p, size_t count, loff_t *ppos)
__func__);
return -EPERM;
}
+ pr_warn_once("Please use %s instead of write(),\n%s\n",
+ "ioctl(SG_SUBMIT_V3)",
+ " See: https://sg.danny.cz/sg/sg_v40.html";);
res = sg_v3_submit(filp, sfp, h3p, false, NULL);
return res < 0 ? res : (int)count;
}
--
2.25.1
