diff options
| author | Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> | 2020-02-03 10:56:50 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-11 07:53:02 +0100 |
| commit | 415a1e41eddfafe0b99825fa3f9f6fde05fab60d (patch) | |
| tree | a19cd9af87b6755782652f4232e51b103897cbd1 /net/wireless | |
| parent | 1ecf7f0e09477a424026f8bdf279b20a5965f7e4 (diff) | |
cfg80211: check wiphy driver existence for drvinfo report
[ Upstream commit bfb7bac3a8f47100ebe7961bd14e924c96e21ca7 ]
When preparing ethtool drvinfo, check if wiphy driver is defined
before dereferencing it. Driver may not exist, e.g. if wiphy is
attached to a virtual platform device.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200203105644.28875-1-sergey.matyukevich.os@quantenna.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/ethtool.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c index e9e91298c70d..3cedf2c2b60b 100644 --- a/net/wireless/ethtool.c +++ b/net/wireless/ethtool.c @@ -6,9 +6,13 @@ void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { struct wireless_dev *wdev = dev->ieee80211_ptr; + struct device *pdev = wiphy_dev(wdev->wiphy); - strlcpy(info->driver, wiphy_dev(wdev->wiphy)->driver->name, - sizeof(info->driver)); + if (pdev->driver) + strlcpy(info->driver, pdev->driver->name, + sizeof(info->driver)); + else + strlcpy(info->driver, "N/A", sizeof(info->driver)); strlcpy(info->version, init_utsname()->release, sizeof(info->version)); |