mbox series

[v2,bpf-next,0/2] Fix bpf_tcp_sock and bpf_sk_fullsock issue related to bpf_sk_release

Message ID 20190301194918.2856285-1-kafai@fb.com
Headers show
Series Fix bpf_tcp_sock and bpf_sk_fullsock issue related to bpf_sk_release | expand

Message

Martin KaFai Lau March 1, 2019, 7:49 p.m. UTC 
This set addresses issue about accessing invalid
ptr returned from bpf_tcp_sock() and bpf_sk_fullsock()
after bpf_sk_release().

v2:
- Remove refcount_id arg from release_reference() because
  id == refcount_id
- Add a WARN_ON_ONCE to mark_ptr_or_null_regs() to catch
  an internal verifier bug.

Martin KaFai Lau (2):
  bpf: Fix bpf_tcp_sock and bpf_sk_fullsock issue related to
    bpf_sk_release
  bpf: Test ref release issue in bpf_tcp_sock and bpf_sk_fullsock.

 include/linux/bpf_verifier.h                  |  9 ++
 kernel/bpf/verifier.c                         | 86 +++++++++++--------
 .../selftests/bpf/verifier/ref_tracking.c     | 73 ++++++++++++++++
 3 files changed, 134 insertions(+), 34 deletions(-)