[PATCH bpf-next v2 5/9] selftests: bpf: Update failure message for rbtree_fail

[Puranjay Mohan <puranjay@kernel.org>]

The rbtree_api_use_unchecked_remove_retval() selftest passes a pointer
received from bpf_rbtree_remove() to bpf_rbtree_add() without checking
for NULL, this was earlier caught by __check_ptr_off_reg() in the
verifier. Now the verifier assumes every kfunc only takes trusted pointer
arguments, so it catches this NULL pointer earlier in the path and
provides a more accurate failure message.

Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
---
 tools/testing/selftests/bpf/progs/rbtree_fail.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/rbtree_fail.c b/tools/testing/selftests/bpf/progs/rbtree_fail.c
index 4acb6af2dfe3..70b7baf9304b 100644
--- a/tools/testing/selftests/bpf/progs/rbtree_fail.c
+++ b/tools/testing/selftests/bpf/progs/rbtree_fail.c
@@ -153,7 +153,7 @@ long rbtree_api_add_to_multiple_trees(void *ctx)
 }
 
 SEC("?tc")
-__failure __msg("dereference of modified ptr_or_null_ ptr R2 off=16 disallowed")
+__failure __msg("Possibly NULL pointer passed to trusted arg1")
 long rbtree_api_use_unchecked_remove_retval(void *ctx)
 {
 	struct bpf_rb_node *res;
-- 
2.47.3