mbox series

[bpf-next,v5,0/2] bpf: expand bpf_d_path helper allowlist

Message ID 20210727132532.2473636-1-hengqi.chen@gmail.com (mailing list archive)
Headers show
Series bpf: expand bpf_d_path helper allowlist | expand


Hengqi Chen July 27, 2021, 1:25 p.m. UTC
This patch set adds more functions to bpf_d_path allowlist.

Patch 1 is prep work which updates resolve_btfids to emit warnings
on missing symbols instead of aborting kernel build process.

Patch 2 expands bpf_d_path allowlist.

Changes since v4: [4] 
 - Addressed Andrii's comments. Update warning message.

Changes since v3: [3] 
 - Addressed Yonghong's comments. Sort allowlist and add security_bprm_*

Changes since v2: [2] 
 - Andrii suggested that we should first address an issue of .BTF_ids
   before adding more symbols to .BTF_ids. Fixed that.
 - Yaniv proposed adding security_sb_mount and security_bprm_check.
   Added them.

Changes since v1: [1] 
 - Alexei and Yonghong suggested that bpf_d_path helper could also
   apply to vfs_* and security_file_* kernel functions. Added them.

[1] https://lore.kernel.org/bpf/20210712162424.2034006-1-hengqi.chen@gmail.com/
[2] https://lore.kernel.org/bpf/20210719151753.399227-1-hengqi.chen@gmail.com/
[3] https://lore.kernel.org/bpf/20210725141814.2000828-3-hengqi.chen@gmail.com/
[4] https://lore.kernel.org/bpf/20210725141814.2000828-2-hengqi.chen@gmail.com/

Hengqi Chen (2):
  tools/resolve_btfids: emit warnings and patch zero id for missing
  bpf: expose bpf_d_path helper to vfs_* and security_* functions

 kernel/trace/bpf_trace.c        | 60 ++++++++++++++++++++++++++++++---
 tools/bpf/resolve_btfids/main.c | 13 +++----
 2 files changed, 63 insertions(+), 10 deletions(-)