From: Li Li <dualli@xxxxxxxxxx>
This fixes the CFI failure at genl-sk_priv_get().
Suggested-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Li Li <dualli@xxxxxxxxxx>
---
tools/net/ynl/pyynl/ynl_gen_c.py | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/tools/net/ynl/pyynl/ynl_gen_c.py b/tools/net/ynl/pyynl/ynl_gen_c.py
index d3a7dfbcf929..9852ba6fd9c3 100755
--- a/tools/net/ynl/pyynl/ynl_gen_c.py
+++ b/tools/net/ynl/pyynl/ynl_gen_c.py
@@ -2411,6 +2411,15 @@ def print_kernel_family_struct_src(family, cw):
if not kernel_can_gen_family_struct(family):
return
+ if 'sock-priv' in family.kernel_family:
+ # Generate "trampolines" to make CFI happy
+ cw.write_func("static void", f"__{family.c_name}_nl_sock_priv_init",
+ [f"{family.c_name}_nl_sock_priv_init(priv);"], ["void *priv"])
+ cw.nl()
+ cw.write_func("static void", f"__{family.c_name}_nl_sock_priv_destroy",
+ [f"{family.c_name}_nl_sock_priv_destroy(priv);"], ["void *priv"])
+ cw.nl()
+
cw.block_start(f"struct genl_family {family.ident_name}_nl_family __ro_after_init =")
cw.p('.name\t\t= ' + family.fam_key + ',')
cw.p('.version\t= ' + family.ver_key + ',')
@@ -2428,9 +2437,8 @@ def print_kernel_family_struct_src(family, cw):
cw.p(f'.n_mcgrps\t= ARRAY_SIZE({family.c_name}_nl_mcgrps),')
if 'sock-priv' in family.kernel_family:
cw.p(f'.sock_priv_size\t= sizeof({family.kernel_family["sock-priv"]}),')
- # Force cast here, actual helpers take pointer to the real type.
- cw.p(f'.sock_priv_init\t= (void *){family.c_name}_nl_sock_priv_init,')
- cw.p(f'.sock_priv_destroy = (void *){family.c_name}_nl_sock_priv_destroy,')
+ cw.p(f'.sock_priv_init\t= __{family.c_name}_nl_sock_priv_init,')
+ cw.p(f'.sock_priv_destroy = __{family.c_name}_nl_sock_priv_destroy,')
cw.block_end(';')
--
2.48.0.rc2.279.g1de40edade-goog
