6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexandra Winter <wintera@xxxxxxxxxxxxx>
[ Upstream commit 0124fb0ebf3b0ef89892d42147c9387be3105318 ]
iucv_alloc_device() gets a format string and a varying number of
arguments. This is incorrectly forwarded by calling dev_set_name() with
the format string and a va_list, while dev_set_name() expects also a
varying number of arguments.
Symptoms:
Corrupted iucv device names, which can result in log messages like:
sysfs: cannot create duplicate filename '/devices/iucv/hvc_iucv1827699952'
Fixes: 4452e8ef8c36 ("s390/iucv: Provide iucv_alloc_device() / iucv_release_device()")
Link: https://bugzilla.suse.com/show_bug.cgi?id=1228425
Signed-off-by: Alexandra Winter <wintera@xxxxxxxxxxxxx>
Reviewed-by: Thorsten Winkler <twinkler@xxxxxxxxxxxxx>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Link: https://patch.msgid.link/20240821091337.3627068-1-wintera@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/iucv/iucv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index b7bf34a5eb37a..1235307020075 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -86,13 +86,15 @@ struct device *iucv_alloc_device(const struct attribute_group **attrs,
{
struct device *dev;
va_list vargs;
+ char buf[20];
int rc;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
goto out_error;
va_start(vargs, fmt);
- rc = dev_set_name(dev, fmt, vargs);
+ vsnprintf(buf, sizeof(buf), fmt, vargs);
+ rc = dev_set_name(dev, "%s", buf);
va_end(vargs);
if (rc)
goto out_error;
--
2.43.0
