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authorAlexandra Winter <wintera@linux.ibm.com>2024-08-21 11:13:37 +0200
committerJakub Kicinski <kuba@kernel.org>2024-08-22 13:09:20 -0700
commit0124fb0ebf3b0ef89892d42147c9387be3105318 (patch)
tree1ce62d4f439fd4a1a358e8549f847a7cc4f74d31 /net/iucv/iucv.c
parent57fb67783c4011581882f32e656d738da1f82042 (diff)
s390/iucv: Fix vargs handling in iucv_alloc_device()
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@linux.ibm.com> Reviewed-by: Thorsten Winkler <twinkler@linux.ibm.com> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Link: https://patch.msgid.link/20240821091337.3627068-1-wintera@linux.ibm.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/iucv/iucv.c')
-rw-r--r--net/iucv/iucv.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 1e42e13ad24e..d3e9efab7f4b 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;