From: Willem de Bruijn willemb@google.com
stable inclusion from stable-v6.6.5 commit aea066ac9e9a4cf246cf8d63a160fc637ab38244 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8N21P
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 7b29828c5af6841bdeb9fafa32fdfeff7ab9c407 ]
Signedness of char is signed on x86_64, but unsigned on arm64.
Fix the warning building cmsg_sender.c on signed platforms or forced with -fsigned-char:
msg_sender.c:455:12: error: implicit conversion from 'int' to 'char' changes value from 128 to -128 [-Werror,-Wconstant-conversion] buf[0] = ICMPV6_ECHO_REQUEST;
constant ICMPV6_ECHO_REQUEST is 128.
Link: https://lwn.net/Articles/911914 Fixes: de17e305a810 ("selftests: net: cmsg_sender: support icmp and raw sockets") Signed-off-by: Willem de Bruijn willemb@google.com Link: https://lore.kernel.org/r/20231124171645.1011043-3-willemdebruijn.kernel@gma... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- tools/testing/selftests/net/cmsg_sender.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c index 24b21b15ed3f..6ff3e732f449 100644 --- a/tools/testing/selftests/net/cmsg_sender.c +++ b/tools/testing/selftests/net/cmsg_sender.c @@ -416,9 +416,9 @@ int main(int argc, char *argv[]) { struct addrinfo hints, *ai; struct iovec iov[1]; + unsigned char *buf; struct msghdr msg; char cbuf[1024]; - char *buf; int err; int fd;