[dm-devel] [PATCH v4 13/14] rxrpc: Prepare to remove VLA usage for SKCIPHER_REQUEST_ON_STACK

[Kees Cook]

Two uses of SKCIPHER_REQUEST_ON_STACK() will trigger FRAME_WARN warnings
(when less than 2048) once the VLA is no longer hidden from the check:

net/rxrpc/rxkad.c:398:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
net/rxrpc/rxkad.c:242:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]

This bumps the affected objects by 20% to silence the warnings while
still providing coverage is anything grows even more.

Signed-off-by: Kees Cook <keescook at chromium.org>
---
 net/rxrpc/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/rxrpc/Makefile b/net/rxrpc/Makefile
index 6ffb7e9887ce..53e1177129e6 100644
--- a/net/rxrpc/Makefile
+++ b/net/rxrpc/Makefile
@@ -32,4 +32,5 @@ rxrpc-y := \
 
 rxrpc-$(CONFIG_PROC_FS) += proc.o
 rxrpc-$(CONFIG_RXKAD) += rxkad.o
+CFLAGS_rxkad.o += $(FRAME_WARN_BUMP_FLAG)
 rxrpc-$(CONFIG_SYSCTL) += sysctl.o
-- 
2.17.1