WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#46: FILE: net/xfrm/xfrm_iptfs.c:104:
+	BUG_ON(!skb->head_frag);

WARNING: line length of 83 exceeds 80 columns
#132: FILE: net/xfrm/xfrm_iptfs.c:458:
+			     (shi->nr_frags + shi2->nr_frags + 1 > MAX_SKB_FRAGS)))

WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#153: FILE: net/xfrm/xfrm_iptfs.c:472:
+				BUG_ON(*nextp);

total: 0 errors, 3 warnings, 0 checks, 136 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 8458020b49c9 ("xfrm: iptfs: share page fragments of inner packets") 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, 3 warnings, 0 checks, 136 lines checked