https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715
--- Comment #4 from Arnd Bergmann <arnd at linaro dot org> --- Created attachment 42195 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42195&action=edit preprocessed net/wireless/nl80211.c, compressed This is another file that shows the problem, in fact we hit this with every allmodconfig build using gcc-5 through gcc-8.0.0: /home/arnd/cross-gcc/bin/x86_64-linux-gcc-5.4.1 -c nl80211.i -O2 --std=gnu89 -Wall -Wno-unused -Wno-pointer-sign -Wframe-larger-than=1024 -fno-strict-aliasing -fno-strict-overflow -fsanitize=kernel-address --param asan-stack=1 -fconserve-stack/git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_add_commands_unsplit': /git/arm-soc/net/wireless/nl80211.c:1411:1: warning: the frame size of 2208 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ /git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_get_mesh_config': /git/arm-soc/net/wireless/nl80211.c:5779:1: warning: the frame size of 2048 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ /git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_send_wiphy': /git/arm-soc/net/wireless/nl80211.c:1905:1: warning: the frame size of 3856 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ... /git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_send_station.isra.47': /git/arm-soc/net/wireless/nl80211.c:4476:1: warning: the frame size of 2240 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ /git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_dump_station': /git/arm-soc/net/wireless/nl80211.c:4529:1: warning: the frame size of 1168 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ /git/arm-soc/net/wireless/nl80211.c: In function 'nl80211_dump_scan': /git/arm-soc/net/wireless/nl80211.c:7837:1: warning: the frame size of 1280 bytes is larger than 1024 bytes [-Wframe-larger-than=] } In comparison: /home/arnd/cross-gcc/bin/clang -c nl80211.i -O2 --std=gnu89 -Wno-gnu -Wall -Wno-unused -Wno-pointer-sign -Wno-tautological-compare -Wno-constant-logical-operand -no-integrated-as -Wframe-larger-than=1024 -fsanitize=kernel-address -mllvm -asan-stack=1 /git/arm-soc/net/wireless/nl80211.c:1420:12: warning: stack frame size of 1816 bytes in function 'nl80211_send_wiphy' [-Wframe-larger-than=] static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev, ^ /git/arm-soc/net/wireless/nl80211.c:14117:6: warning: stack frame size of 1112 bytes in function 'cfg80211_del_sta_sinfo' [-Wframe-larger-than=] void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr, ^ /git/arm-soc/net/wireless/nl80211.c:9717:12: warning: stack frame size of 1144 bytes in function 'cfg80211_cqm_rssi_update' [-Wframe-larger-than=] static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev, ^ /git/arm-soc/net/wireless/nl80211.c:4531:12: warning: stack frame size of 1112 bytes in function 'nl80211_get_station' [-Wframe-larger-than=] static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) ^ /git/arm-soc/net/wireless/nl80211.c:4478:12: warning: stack frame size of 1240 bytes in function 'nl80211_dump_station' [-Wframe-larger-than=] static int nl80211_dump_station(struct sk_buff *skb, The proposed workaround in the kernel is https://patchwork.kernel.org/patch/9787449/, but it would be good to not need this for future compilers.
