diff mbox series

tap: check that file is BPF arch before extracting

Message ID 20240107174010.8278-1-stephen@networkplumber.org (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers
Series tap: check that file is BPF arch before extracting |

Checks

Context Check Description
ci/loongarch-compilation success Compilation OK
ci/checkpatch success coding style OK
ci/loongarch-unit-testing success Unit Testing PASS
ci/github-robot: build success github build: passed
ci/Intel-compilation success Compilation OK
ci/intel-Testing success Testing PASS
ci/intel-Functional success Functional PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-compile-amd64-testing success Testing PASS
ci/iol-unit-amd64-testing success Testing PASS
ci/iol-unit-arm64-testing success Testing PASS
ci/iol-sample-apps-testing success Testing PASS
ci/iol-compile-arm64-testing success Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS

Commit Message

Stephen Hemminger Jan. 7, 2024, 5:40 p.m. UTC 
  The script to extract BPF instructions from compiled ELF file
would break if the ELF file was incorrectly built.
Add simple check to give better message.

Fixes: 4e679a5f1212 ("net/tap: add infrastructure to build BPF filter")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/tap/bpf/bpf_extract.py | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/tap/bpf/bpf_extract.py b/drivers/net/tap/bpf/bpf_extract.py
index b630c42b809f..72c15cf7ad12 100644
--- a/drivers/net/tap/bpf/bpf_extract.py
+++ b/drivers/net/tap/bpf/bpf_extract.py
@@ -77,6 +77,8 @@  def main():
         write_header(out, args.source)
         for path in args.file:
             elffile = ELFFile(open_input(path))
+            if elffile['e_machine'] != 'EM_BPF':
+                sys.exit(f'{path} is not BPF')
             sections = load_sections(elffile)
             for name, insns in sections:
                 dump_section(name, insns, out)