generic: net: add pending wireguard patch to fix build with GCC15
This patch adds __nonstring annotation to address GCC15 with -Wunterminated-string-initialization. It is accepted in wireguard-linux in [1] and pending for v6.16 in [2]. [1] https://git.zx2c4.com/wireguard-linux/commit/?h=devel&id=71e5da46e78c1cd24e2feed251a2845327447ad8 [2] https://patch.msgid.link/20250521212707.1767879-3-Jason@zx2c4.com Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com> Link: https://github.com/openwrt/openwrt/pull/18950 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Jonas Jelonek
Hauke Mehrtens
parent
d2764bfd7e
commit
a5e6deb867
2 changed files with 126 additions and 0 deletions
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From 71e5da46e78c1cd24e2feed251a2845327447ad8 Mon Sep 17 00:00:00 2001
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From: Kees Cook <kees@kernel.org>
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Date: Wed, 21 May 2025 23:27:04 +0200
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Subject: wireguard: global: add __nonstring annotations for unterminated
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strings
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When a character array without a terminating NUL character has a static
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initializer, GCC 15's -Wunterminated-string-initialization will only
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warn if the array lacks the "nonstring" attribute[1]. Mark the arrays
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with __nonstring to correctly identify the char array as "not a C string"
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and thereby eliminate the warning:
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../drivers/net/wireguard/cookie.c:29:56: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
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29 | static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] = "mac1----";
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| ^~~~~~~~~~
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../drivers/net/wireguard/cookie.c:30:58: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
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30 | static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] = "cookie--";
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| ^~~~~~~~~~
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../drivers/net/wireguard/noise.c:28:38: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (38 chars into 37 available) [-Wunterminated-string-initialization]
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28 | static const u8 handshake_name[37] = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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../drivers/net/wireguard/noise.c:29:39: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (35 chars into 34 available) [-Wunterminated-string-initialization]
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29 | static const u8 identifier_name[34] = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The arrays are always used with their fixed size, so use __nonstring.
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Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178 [1]
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Signed-off-by: Kees Cook <kees@kernel.org>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Link: https://patch.msgid.link/20250521212707.1767879-3-Jason@zx2c4.com
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/wireguard/cookie.c | 4 ++--
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drivers/net/wireguard/noise.c | 4 ++--
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2 files changed, 4 insertions(+), 4 deletions(-)
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--- a/drivers/net/wireguard/cookie.c
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+++ b/drivers/net/wireguard/cookie.c
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@@ -26,8 +26,8 @@ void wg_cookie_checker_init(struct cooki
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}
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enum { COOKIE_KEY_LABEL_LEN = 8 };
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-static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] = "mac1----";
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-static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] = "cookie--";
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+static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] __nonstring = "mac1----";
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+static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] __nonstring = "cookie--";
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static void precompute_key(u8 key[NOISE_SYMMETRIC_KEY_LEN],
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const u8 pubkey[NOISE_PUBLIC_KEY_LEN],
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--- a/drivers/net/wireguard/noise.c
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+++ b/drivers/net/wireguard/noise.c
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@@ -25,8 +25,8 @@
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* <- e, ee, se, psk, {}
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*/
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-static const u8 handshake_name[37] = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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-static const u8 identifier_name[34] = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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+static const u8 handshake_name[37] __nonstring = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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+static const u8 identifier_name[34] __nonstring = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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static u8 handshake_init_hash[NOISE_HASH_LEN] __ro_after_init;
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static u8 handshake_init_chaining_key[NOISE_HASH_LEN] __ro_after_init;
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static atomic64_t keypair_counter = ATOMIC64_INIT(0);
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@ -0,0 +1,63 @@
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From 71e5da46e78c1cd24e2feed251a2845327447ad8 Mon Sep 17 00:00:00 2001
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From: Kees Cook <kees@kernel.org>
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Date: Wed, 21 May 2025 23:27:04 +0200
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Subject: wireguard: global: add __nonstring annotations for unterminated
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strings
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When a character array without a terminating NUL character has a static
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initializer, GCC 15's -Wunterminated-string-initialization will only
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warn if the array lacks the "nonstring" attribute[1]. Mark the arrays
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with __nonstring to correctly identify the char array as "not a C string"
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and thereby eliminate the warning:
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../drivers/net/wireguard/cookie.c:29:56: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
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29 | static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] = "mac1----";
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| ^~~~~~~~~~
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../drivers/net/wireguard/cookie.c:30:58: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
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30 | static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] = "cookie--";
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| ^~~~~~~~~~
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../drivers/net/wireguard/noise.c:28:38: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (38 chars into 37 available) [-Wunterminated-string-initialization]
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28 | static const u8 handshake_name[37] = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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../drivers/net/wireguard/noise.c:29:39: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (35 chars into 34 available) [-Wunterminated-string-initialization]
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29 | static const u8 identifier_name[34] = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The arrays are always used with their fixed size, so use __nonstring.
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Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178 [1]
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Signed-off-by: Kees Cook <kees@kernel.org>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Link: https://patch.msgid.link/20250521212707.1767879-3-Jason@zx2c4.com
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/wireguard/cookie.c | 4 ++--
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drivers/net/wireguard/noise.c | 4 ++--
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2 files changed, 4 insertions(+), 4 deletions(-)
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--- a/drivers/net/wireguard/cookie.c
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+++ b/drivers/net/wireguard/cookie.c
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@@ -26,8 +26,8 @@ void wg_cookie_checker_init(struct cooki
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}
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enum { COOKIE_KEY_LABEL_LEN = 8 };
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-static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] = "mac1----";
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-static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] = "cookie--";
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+static const u8 mac1_key_label[COOKIE_KEY_LABEL_LEN] __nonstring = "mac1----";
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+static const u8 cookie_key_label[COOKIE_KEY_LABEL_LEN] __nonstring = "cookie--";
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static void precompute_key(u8 key[NOISE_SYMMETRIC_KEY_LEN],
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const u8 pubkey[NOISE_PUBLIC_KEY_LEN],
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--- a/drivers/net/wireguard/noise.c
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+++ b/drivers/net/wireguard/noise.c
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@@ -25,8 +25,8 @@
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* <- e, ee, se, psk, {}
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*/
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-static const u8 handshake_name[37] = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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-static const u8 identifier_name[34] = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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+static const u8 handshake_name[37] __nonstring = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
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+static const u8 identifier_name[34] __nonstring = "WireGuard v1 zx2c4 Jason@zx2c4.com";
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static u8 handshake_init_hash[NOISE_HASH_LEN] __ro_after_init;
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static u8 handshake_init_chaining_key[NOISE_HASH_LEN] __ro_after_init;
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static atomic64_t keypair_counter = ATOMIC64_INIT(0);
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