Commit 0fef0907 authored by Kees Cook's avatar Kees Cook Committed by Jakub Kicinski
Browse files

netem: Annotate struct disttable with __counted_by 

Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for
array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct disttable.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

 [1]
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Link: https://lore.kernel.org/r/20231003231823.work.684-kees@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3e584e32

net/sched/sch_netem.c

+1 −1
Original line number Diff line number Diff line
@@ -67,7 +67,7 @@ 


struct disttable {

	u32  size;

	s16 table[];

	s16 table[] __counted_by(size);

};



struct netem_sched_data {