| Message ID | 20240902015803.20420-1-pkshih@realtek.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: rtw89: avoid reading out of bounds when loading TX power FW elements | expand |
Ping-Ke Shih <pkshih@realtek.com> wrote: > From: Zong-Zhe Yang <kevin_yang@realtek.com> > > Because the loop-expression will do one more time before getting false from > cond-expression, the original code copied one more entry size beyond valid > region. > > Fix it by moving the entry copy to loop-body. > > Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com> > Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> 1 patch(es) applied to rtw-next branch of rtw.git, thanks. ed2e4bb17a48 wifi: rtw89: avoid reading out of bounds when loading TX power FW elements --- https://github.com/pkshih/rtw.git
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h index 7c3aeedfd93a..4e8914218044 100644 --- a/drivers/net/wireless/realtek/rtw89/core.h +++ b/drivers/net/wireless/realtek/rtw89/core.h @@ -3970,16 +3970,22 @@ struct rtw89_txpwr_conf { const void *data; }; +static inline bool rtw89_txpwr_entcpy(void *entry, const void *cursor, u8 size, + const struct rtw89_txpwr_conf *conf) +{ + u8 valid_size = min(size, conf->ent_sz); + + memcpy(entry, cursor, valid_size); + return true; +} + #define rtw89_txpwr_conf_valid(conf) (!!(conf)->data) #define rtw89_for_each_in_txpwr_conf(entry, cursor, conf) \ - for (typecheck(const void *, cursor), (cursor) = (conf)->data, \ - memcpy(&(entry), cursor, \ - min_t(u8, sizeof(entry), (conf)->ent_sz)); \ + for (typecheck(const void *, cursor), (cursor) = (conf)->data; \ (cursor) < (conf)->data + (conf)->num_ents * (conf)->ent_sz; \ - (cursor) += (conf)->ent_sz, \ - memcpy(&(entry), cursor, \ - min_t(u8, sizeof(entry), (conf)->ent_sz))) + (cursor) += (conf)->ent_sz) \ + if (rtw89_txpwr_entcpy(&(entry), cursor, sizeof(entry), conf)) struct rtw89_txpwr_byrate_data { struct rtw89_txpwr_conf conf;