diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2018-01-15 09:58:27 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2018-01-15 11:35:06 +0100 |
| commit | 59b179b48ce2a6076448a44531242ac2b3f6cef2 (patch) | |
| tree | bce14f04026957d72570620de8ff83f25620c9e0 /net | |
| parent | mac80211_hwsim: validate number of different channels (diff) | |
| download | linux-59b179b48ce2a6076448a44531242ac2b3f6cef2.tar.xz linux-59b179b48ce2a6076448a44531242ac2b3f6cef2.zip | |
cfg80211: check dev_set_name() return value
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c index fdde0d98fde1..a6f3cac8c640 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -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); |