libbpf: Fix memory leak/double free issue
authorAndrii Nakryiko <andriin@fb.com>
Thu, 7 Nov 2019 02:08:51 +0000 (18:08 -0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 7 Nov 2019 15:20:37 +0000 (16:20 +0100)
commit3dc5e059821376974177cc801d377e3fcdac6712
treec002484aed94bdf2589426e66b140cdbee7d838a
parent9656b346b280c3e49c8a116c3a715f966633b161
libbpf: Fix memory leak/double free issue

Coverity scan against Github libbpf code found the issue of not freeing memory and
leaving already freed memory still referenced from bpf_program. Fix it by
re-assigning successfully reallocated memory sooner.

Fixes: 2993e0515bb4 ("tools/bpf: add support to read .BTF.ext sections")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20191107020855.3834758-2-andriin@fb.com
tools/lib/bpf/libbpf.c