WARNING: line length of 102 exceeds 80 columns
#46: FILE: tools/testing/selftests/net/netfilter/conntrack_resize.sh:190:
+		ip netns exec "$ns" timeout 30 ./udpclash 127.0.0.1 $((RANDOM%65536)) > /dev/null 2>&1

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#76: FILE: tools/testing/selftests/net/netfilter/udpclash.c:32:
+static volatile int wait = 1;

total: 0 errors, 2 warnings, 0 checks, 39 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 8466ffd2b466 ("selftests: netfilter: fix udpclash tool hang") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 2 warnings, 0 checks, 39 lines checked