Commit 9dc182c5 authored by Anton Protopopov's avatar Anton Protopopov Committed by Daniel Borkmann
Browse files

bpf: Add a verbose message if map limit is reached 



When more than 64 maps are used by a program and its subprograms the
verifier returns -E2BIG. Add a verbose message which highlights the
source of the error and also print the actual limit.

Signed-off-by: default avatarAnton Protopopov <aspsk@isovalent.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarYonghong Song <yonghong.song@linux.dev>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20240402073347.195920-1-aspsk@isovalent.com
parent ca4ddc26

kernel/bpf/verifier.c

+2 −0
Original line number Diff line number Diff line
@@ -18348,6 +18348,8 @@ static int resolve_pseudo_ldimm64(struct bpf_verifier_env *env) 
			}









			if (env->used_map_cnt >= MAX_USED_MAPS) {









				verbose(env, "The total number of maps per program has reached the limit of %u\n",









					MAX_USED_MAPS);









				fdput(f);









				return -E2BIG;









			}