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libbpf: Fix potential NULL dereference when parsing ELF

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

Fixes: 47ea7417b0 ("libbpf: Skip empty sections in bpf_object__init_global_data_maps")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Hao Luo <haoluo@google.com>
Link: https://lore.kernel.org/bpf/20220816001929.369487-2-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2022-08-15 17:19:26 -07:00 committed by Daniel Borkmann
parent 738a2f2f91
commit d4e6d684f3
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/libbpf.c
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@ -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) {