Commit d4e6d684 authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Daniel Borkmann
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libbpf: Fix potential NULL dereference when parsing ELF 



Fix if condition filtering empty ELF sections to prevent NULL
dereference.

Fixes: 47ea7417 ("libbpf: Skip empty sections in bpf_object__init_global_data_maps")
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarHao Luo <haoluo@google.com>
Link: https://lore.kernel.org/bpf/20220816001929.369487-2-andrii@kernel.org
parent 738a2f2f

tools/lib/bpf/libbpf.c

+1 −1
Original line number Diff line number Diff line
@@ -1649,7 +1649,7 @@ static int bpf_object__init_global_data_maps(struct bpf_object *obj) 
		sec_desc = &obj->efile.secs[sec_idx];



		/* Skip recognized sections with size 0. */

		if (sec_desc->data && sec_desc->data->d_size == 0)

		if (!sec_desc->data || sec_desc->data->d_size == 0)

			continue;



		switch (sec_desc->sec_type) {