Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-14 17:53:39 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

cfg80211: check dev_set_name() return value

Browse Source 
syzbot reported a warning from rfkill_alloc(), and after a while
I think that the reason is that it was doing fault injection and
the dev_set_name() failed, leaving the name NULL, and we didn't
check the return value and got to rfkill_alloc() with a NULL name.
Since we really don't want a NULL name, we ought to check the
return value.

Fixes: fb28ad35906a ("net: struct device - replace bus_id with dev_name(), dev_set_name()")
Reported-by: syzbot+1ddfb3357e1d7bb5b5d3@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-01-15 09:58:27 +01:00
parent 51a1aaa631
commit 59b179b48c
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/wireless/core.c
View File

@ -439,6 +439,8 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
if (rv)
goto use_default_name;
} else {
int rv;
use_default_name:
/* NOTE: This is *probably* safe w/out holding rtnl because of
* the restrictions on phy names. Probably this call could
@ -446,7 +448,11 @@ use_default_name:
* phyX. But, might should add some locking and check return
* value, and use a different name if this one exists?
*/
dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
if (rv < 0) {
kfree(rdev);
return NULL;
}
}
INIT_LIST_HEAD(&rdev->wiphy.wdev_list);