diff options
| author | Jouni Malinen <j@w1.fi> | 2019-02-11 16:29:04 +0200 |
|---|---|---|
| committer | Todd Kjos <tkjos@google.com> | 2020-08-05 15:02:38 -0700 |
| commit | 5bddbcf1d39d8569cb0527cbd818a2d66d92852f (patch) | |
| tree | e74f10d87f34fc145eb7ba788e7a436cf84e7a73 | |
| parent | 7b534d9815935ed83fa59cac9591c1c57328b458 (diff) | |
cfg80211: Use const more consistently in for_each_element macrosASB-2020-08-05_4.4-o-release
commit 7388afe09143210f555bdd6c75035e9acc1fab96 upstream.
Enforce the first argument to be a correct type of a pointer to struct
element and avoid unnecessary typecasts from const to non-const pointers
(the change in validate_ie_attr() is needed to make this part work). In
addition, avoid signed/unsigned comparison within for_each_element() and
mark struct element packed just in case.
Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/ieee80211.h | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 40978def5aca..149a7a6687e9 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -2554,16 +2554,16 @@ struct element { u8 id; u8 datalen; u8 data[]; -}; +} __packed; /* element iteration helpers */ -#define for_each_element(element, _data, _datalen) \ - for (element = (void *)(_data); \ - (u8 *)(_data) + (_datalen) - (u8 *)element >= \ - sizeof(*element) && \ - (u8 *)(_data) + (_datalen) - (u8 *)element >= \ - sizeof(*element) + element->datalen; \ - element = (void *)(element->data + element->datalen)) +#define for_each_element(_elem, _data, _datalen) \ + for (_elem = (const struct element *)(_data); \ + (const u8 *)(_data) + (_datalen) - (const u8 *)_elem >= \ + (int)sizeof(*_elem) && \ + (const u8 *)(_data) + (_datalen) - (const u8 *)_elem >= \ + (int)sizeof(*_elem) + _elem->datalen; \ + _elem = (const struct element *)(_elem->data + _elem->datalen)) #define for_each_element_id(element, _id, data, datalen) \ for_each_element(element, data, datalen) \ @@ -2600,7 +2600,7 @@ struct element { static inline bool for_each_element_completed(const struct element *element, const void *data, size_t datalen) { - return (u8 *)element == (u8 *)data + datalen; + return (const u8 *)element == (const u8 *)data + datalen; } #endif /* LINUX_IEEE80211_H */ |