[PATCH bpf-next v2 0/3] libbpf: fix fuzzer-reported issues

[Shung-Hsi Yu <shung-hsi.yu@suse.com>]

Hi, this patch set fixes several fuzzer-reported issues of libbpf when
dealing with (malformed) BPF object file:

- patch #1 fix out-of-bound heap write reported by oss-fuzz (currently
  incorrectly marked as fixed)

- patch #2 and #3 fix null-pointer dereference found by locally-run
  fuzzer.

v2:
- Rebase to bpf-next
- Move elf_getshdrnum() closer to where it's result is used in patch #1, as
  suggested by Andrii
  - Touch up the comment in bpf_object__elf_collect(), replacing mention of
    e_shnum with elf_getshdrnum()
- Minor wording change in commit message of patch #1 to for better readability
- Remove extra note that comes after commit message in patch #1

v1: https://lore.kernel.org/bpf/20221007174816.17536-1-shung-hsi.yu@suse.com/

Shung-Hsi Yu (3):
  libbpf: use elf_getshdrnum() instead of e_shnum
  libbpf: deal with section with no data gracefully
  libbpf: fix null-pointer dereference in find_prog_by_sec_insn()

 tools/lib/bpf/libbpf.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)


base-commit: 0326074ff4652329f2a1a9c8685104576bd8d131
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2.37.3