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[1/3] selftests/bpf: Disable strict aliasing for verifier_nocsr.c

Message ID 20240819151129.1366484-2-cupertino.miranda@oracle.com (mailing list archive)
State Accepted
Commit 2aa93695081d4bd62350b41d58684d802be4563f
Delegated to: BPF
Headers show
Series Correct recent GCC incompatible changes. | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch
bpf/vmtest-bpf-next-PR success PR summary
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Commit Message

Cupertino Miranda Aug. 19, 2024, 3:11 p.m. UTC 
verfifier_nocsr.c fails to compile in GCC. The reason behind it was
initially explained in commit 27a90b14b93d3b2e1efd10764e456af7e2a42991.

"A few BPF selftests perform type punning and they may break strict
aliasing rules, which are exploited by both GCC and clang by default
while optimizing.  This can lead to broken compiled programs."

Signed-off-by: Cupertino Miranda <cupertino.miranda@oracle.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jose Marchesi <jose.marchesi@oracle.com>
Cc: David Faust <david.faust@oracle.com>
---
 tools/testing/selftests/bpf/Makefile | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 00bde031a469..ded6e22b3076 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -58,6 +58,7 @@  progs/test_pkt_md_access.c-CFLAGS := -fno-strict-aliasing
 progs/test_sk_lookup.c-CFLAGS := -fno-strict-aliasing
 progs/timer_crash.c-CFLAGS := -fno-strict-aliasing
 progs/test_global_func9.c-CFLAGS := -fno-strict-aliasing
+progs/verifier_nocsr.c-CFLAGS := -fno-strict-aliasing
 
 ifneq ($(LLVM),)
 # Silence some warnings when compiled with clang