Dmitry Antipov <dmantipov@xxxxxxxxx> wrote: > When compiling with clang 16.0.6 and CONFIG_FORTIFY_SOURCE=y, I've > noticed the following (somewhat confusing due to absence of an actual > source code location): > > In file included from drivers/net/wireless/ath/ath10k/debug.c:8: > In file included from ./include/linux/module.h:13: > In file included from ./include/linux/stat.h:19: > In file included from ./include/linux/time.h:60: > In file included from ./include/linux/time32.h:13: > In file included from ./include/linux/timex.h:67: > In file included from ./arch/x86/include/asm/timex.h:5: > In file included from ./arch/x86/include/asm/processor.h:23: > In file included from ./arch/x86/include/asm/msr.h:11: > In file included from ./arch/x86/include/asm/cpumask.h:5: > In file included from ./include/linux/cpumask.h:12: > In file included from ./include/linux/bitmap.h:11: > In file included from ./include/linux/string.h:254: > ./include/linux/fortify-string.h:592:4: warning: call to '__read_overflow2_field' > declared with 'warning' attribute: detected read beyond size of field (2nd > parameter); maybe use struct_group()? [-Wattribute-warning] > __read_overflow2_field(q_size_field, size); > > The compiler actually complains on 'ath10k_debug_get_et_strings()' where > fortification logic inteprets call to 'memcpy()' as an attempt to copy > the whole 'ath10k_gstrings_stats' array from it's first member and so > issues an overread warning. This warning may be silenced by passing > an address of the whole array and not the first member to 'memcpy()'. > > Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx> > Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. cb4c132ebfea wifi: ath10k: fix clang-specific fortify warning -- https://patchwork.kernel.org/project/linux-wireless/patch/20230829093652.234537-1-dmantipov@xxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
