From: Kees Cook Date: Fri, 29 Sep 2023 18:11:47 +0000 (-0700) Subject: cxgb4: Annotate struct cxgb4_tc_u32_table with __counted_by X-Git-Tag: v6.7-rc1~160^2~241^2~2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=157c56a4fedecb0f91a96a138a5cd8954d00541f;p=thirdparty%2Flinux.git cxgb4: Annotate struct cxgb4_tc_u32_table with __counted_by Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cxgb4_tc_u32_table. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Raju Rangoju Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230929181149.3006432-3-keescook@chromium.org Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h index f59dd4b2ae6f9..9050568a034cd 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h @@ -331,6 +331,6 @@ struct cxgb4_link { struct cxgb4_tc_u32_table { unsigned int size; /* number of entries in table */ - struct cxgb4_link table[]; /* Jump table */ + struct cxgb4_link table[] __counted_by(size); /* Jump table */ }; #endif /* __CXGB4_TC_U32_PARSE_H */