diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2020-11-17 12:59:02 -0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2020-12-11 12:50:27 +0100 |
| commit | 32fc4a9ad56f8260025ac766548d625509cc879f (patch) | |
| tree | 8312cd3fe677ba3eb1cc8223eb71dafb2bffe5a5 /net/wireless | |
| parent | c7ed0e683ddbfb9349b6c25dbca3e1c8d76f5b87 (diff) | |
cfg80211: fix callback type mismatches in wext-compat
Instead of casting callback functions to type iw_handler, which trips
indirect call checking with Clang's Control-Flow Integrity (CFI), add
stub functions with the correct function type for the callbacks.
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201117205902.405316-1-samitolvanen@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/wext-compat.c | 103 |
1 files changed, 71 insertions, 32 deletions
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index b84a345b2653..fd9ad74972fb 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -1421,39 +1421,78 @@ static int cfg80211_wext_siwpmksa(struct net_device *dev, } } +#define DEFINE_WEXT_COMPAT_STUB(func, type) \ + static int __ ## func(struct net_device *dev, \ + struct iw_request_info *info, \ + union iwreq_data *wrqu, \ + char *extra) \ + { \ + return func(dev, info, (type *)wrqu, extra); \ + } + +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwname, char) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwfreq, struct iw_freq) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwfreq, struct iw_freq) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwmode, u32) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwmode, u32) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwrange, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwap, struct sockaddr) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwap, struct sockaddr) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwmlme, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwscan, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwessid, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwessid, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwrate, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwrate, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwrts, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwrts, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwfrag, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwfrag, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwretry, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwretry, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwencode, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwencode, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwpower, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwpower, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwgenie, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_giwauth, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwauth, struct iw_param) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwencodeext, struct iw_point) +DEFINE_WEXT_COMPAT_STUB(cfg80211_wext_siwpmksa, struct iw_point) + static const iw_handler cfg80211_handlers[] = { - [IW_IOCTL_IDX(SIOCGIWNAME)] = (iw_handler) cfg80211_wext_giwname, - [IW_IOCTL_IDX(SIOCSIWFREQ)] = (iw_handler) cfg80211_wext_siwfreq, - [IW_IOCTL_IDX(SIOCGIWFREQ)] = (iw_handler) cfg80211_wext_giwfreq, - [IW_IOCTL_IDX(SIOCSIWMODE)] = (iw_handler) cfg80211_wext_siwmode, - [IW_IOCTL_IDX(SIOCGIWMODE)] = (iw_handler) cfg80211_wext_giwmode, - [IW_IOCTL_IDX(SIOCGIWRANGE)] = (iw_handler) cfg80211_wext_giwrange, - [IW_IOCTL_IDX(SIOCSIWAP)] = (iw_handler) cfg80211_wext_siwap, - [IW_IOCTL_IDX(SIOCGIWAP)] = (iw_handler) cfg80211_wext_giwap, - [IW_IOCTL_IDX(SIOCSIWMLME)] = (iw_handler) cfg80211_wext_siwmlme, - [IW_IOCTL_IDX(SIOCSIWSCAN)] = (iw_handler) cfg80211_wext_siwscan, - [IW_IOCTL_IDX(SIOCGIWSCAN)] = (iw_handler) cfg80211_wext_giwscan, - [IW_IOCTL_IDX(SIOCSIWESSID)] = (iw_handler) cfg80211_wext_siwessid, - [IW_IOCTL_IDX(SIOCGIWESSID)] = (iw_handler) cfg80211_wext_giwessid, - [IW_IOCTL_IDX(SIOCSIWRATE)] = (iw_handler) cfg80211_wext_siwrate, - [IW_IOCTL_IDX(SIOCGIWRATE)] = (iw_handler) cfg80211_wext_giwrate, - [IW_IOCTL_IDX(SIOCSIWRTS)] = (iw_handler) cfg80211_wext_siwrts, - [IW_IOCTL_IDX(SIOCGIWRTS)] = (iw_handler) cfg80211_wext_giwrts, - [IW_IOCTL_IDX(SIOCSIWFRAG)] = (iw_handler) cfg80211_wext_siwfrag, - [IW_IOCTL_IDX(SIOCGIWFRAG)] = (iw_handler) cfg80211_wext_giwfrag, - [IW_IOCTL_IDX(SIOCSIWTXPOW)] = (iw_handler) cfg80211_wext_siwtxpower, - [IW_IOCTL_IDX(SIOCGIWTXPOW)] = (iw_handler) cfg80211_wext_giwtxpower, - [IW_IOCTL_IDX(SIOCSIWRETRY)] = (iw_handler) cfg80211_wext_siwretry, - [IW_IOCTL_IDX(SIOCGIWRETRY)] = (iw_handler) cfg80211_wext_giwretry, - [IW_IOCTL_IDX(SIOCSIWENCODE)] = (iw_handler) cfg80211_wext_siwencode, - [IW_IOCTL_IDX(SIOCGIWENCODE)] = (iw_handler) cfg80211_wext_giwencode, - [IW_IOCTL_IDX(SIOCSIWPOWER)] = (iw_handler) cfg80211_wext_siwpower, - [IW_IOCTL_IDX(SIOCGIWPOWER)] = (iw_handler) cfg80211_wext_giwpower, - [IW_IOCTL_IDX(SIOCSIWGENIE)] = (iw_handler) cfg80211_wext_siwgenie, - [IW_IOCTL_IDX(SIOCSIWAUTH)] = (iw_handler) cfg80211_wext_siwauth, - [IW_IOCTL_IDX(SIOCGIWAUTH)] = (iw_handler) cfg80211_wext_giwauth, - [IW_IOCTL_IDX(SIOCSIWENCODEEXT)]= (iw_handler) cfg80211_wext_siwencodeext, - [IW_IOCTL_IDX(SIOCSIWPMKSA)] = (iw_handler) cfg80211_wext_siwpmksa, + [IW_IOCTL_IDX(SIOCGIWNAME)] = __cfg80211_wext_giwname, + [IW_IOCTL_IDX(SIOCSIWFREQ)] = __cfg80211_wext_siwfreq, + [IW_IOCTL_IDX(SIOCGIWFREQ)] = __cfg80211_wext_giwfreq, + [IW_IOCTL_IDX(SIOCSIWMODE)] = __cfg80211_wext_siwmode, + [IW_IOCTL_IDX(SIOCGIWMODE)] = __cfg80211_wext_giwmode, + [IW_IOCTL_IDX(SIOCGIWRANGE)] = __cfg80211_wext_giwrange, + [IW_IOCTL_IDX(SIOCSIWAP)] = __cfg80211_wext_siwap, + [IW_IOCTL_IDX(SIOCGIWAP)] = __cfg80211_wext_giwap, + [IW_IOCTL_IDX(SIOCSIWMLME)] = __cfg80211_wext_siwmlme, + [IW_IOCTL_IDX(SIOCSIWSCAN)] = cfg80211_wext_siwscan, + [IW_IOCTL_IDX(SIOCGIWSCAN)] = __cfg80211_wext_giwscan, + [IW_IOCTL_IDX(SIOCSIWESSID)] = __cfg80211_wext_siwessid, + [IW_IOCTL_IDX(SIOCGIWESSID)] = __cfg80211_wext_giwessid, + [IW_IOCTL_IDX(SIOCSIWRATE)] = __cfg80211_wext_siwrate, + [IW_IOCTL_IDX(SIOCGIWRATE)] = __cfg80211_wext_giwrate, + [IW_IOCTL_IDX(SIOCSIWRTS)] = __cfg80211_wext_siwrts, + [IW_IOCTL_IDX(SIOCGIWRTS)] = __cfg80211_wext_giwrts, + [IW_IOCTL_IDX(SIOCSIWFRAG)] = __cfg80211_wext_siwfrag, + [IW_IOCTL_IDX(SIOCGIWFRAG)] = __cfg80211_wext_giwfrag, + [IW_IOCTL_IDX(SIOCSIWTXPOW)] = cfg80211_wext_siwtxpower, + [IW_IOCTL_IDX(SIOCGIWTXPOW)] = cfg80211_wext_giwtxpower, + [IW_IOCTL_IDX(SIOCSIWRETRY)] = __cfg80211_wext_siwretry, + [IW_IOCTL_IDX(SIOCGIWRETRY)] = __cfg80211_wext_giwretry, + [IW_IOCTL_IDX(SIOCSIWENCODE)] = __cfg80211_wext_siwencode, + [IW_IOCTL_IDX(SIOCGIWENCODE)] = __cfg80211_wext_giwencode, + [IW_IOCTL_IDX(SIOCSIWPOWER)] = __cfg80211_wext_siwpower, + [IW_IOCTL_IDX(SIOCGIWPOWER)] = __cfg80211_wext_giwpower, + [IW_IOCTL_IDX(SIOCSIWGENIE)] = __cfg80211_wext_siwgenie, + [IW_IOCTL_IDX(SIOCSIWAUTH)] = __cfg80211_wext_siwauth, + [IW_IOCTL_IDX(SIOCGIWAUTH)] = __cfg80211_wext_giwauth, + [IW_IOCTL_IDX(SIOCSIWENCODEEXT)]= __cfg80211_wext_siwencodeext, + [IW_IOCTL_IDX(SIOCSIWPMKSA)] = __cfg80211_wext_siwpmksa, }; const struct iw_handler_def cfg80211_wext_handler = { |