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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2026-04-09 16:34:43 -0600 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2026-04-10 12:16:27 +0200 |
| commit | f30e5a7291a879deeeb6b9ba92b12c9be1ee5f29 (patch) | |
| tree | 5dc3234a04561b0c36bc1483b4a4b241d985065d | |
| parent | 84dee05d9d61884ee0986f5b4f3d69886f7dfeb0 (diff) | |
netfilter: x_tables: Avoid a couple -Wflex-array-member-not-at-end warnings
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.
Use the TRAILING_OVERLAP() helper to fix the following warnings:
1 net/netfilter/x_tables.c:816:39: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
1 net/netfilter/x_tables.c:811:39: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
This helper creates a union between a flexible-array member (FAM)
and a set of members that would otherwise follow it. This overlays
the trailing members onto the FAM while preserving the original
memory layout.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
| -rw-r--r-- | net/netfilter/x_tables.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index b39017c80548..9f837fb5ceb4 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -819,13 +819,17 @@ EXPORT_SYMBOL_GPL(xt_compat_match_to_user); /* non-compat version may have padding after verdict */ struct compat_xt_standard_target { - struct compat_xt_entry_target t; - compat_uint_t verdict; + /* Must be last as it ends in a flexible-array member. */ + TRAILING_OVERLAP(struct compat_xt_entry_target, t, data, + compat_uint_t verdict; + ); }; struct compat_xt_error_target { - struct compat_xt_entry_target t; - char errorname[XT_FUNCTION_MAXNAMELEN]; + /* Must be last as it ends in a flexible-array member. */ + TRAILING_OVERLAP(struct compat_xt_entry_target, t, data, + char errorname[XT_FUNCTION_MAXNAMELEN]; + ); }; int xt_compat_check_entry_offsets(const void *base, const char *elems, |