path: root/arch/x86_64
diff options
authorRich Felker <>2012-07-12 21:37:54 -0400
committerRich Felker <>2012-07-12 21:37:54 -0400
commit96107564e2eabbc13800fe7a7d930b67216d0805 (patch)
treec46507f195ab69f3ffacfdeca118e337e097849e /arch/x86_64
parent90e123f4a810d17c6bd8c2102939f6416481427e (diff)
workaround another sendmsg kernel bug on 64-bit machines
the kernel wrongly expects the cmsg length field to be size_t instead of socklen_t. in order to work around the issue, we have to impose a length limit and copy to a local buffer. the length limit should be more than sufficient for any real-world use; these headers are only used for passing file descriptors and permissions between processes over unix sockets.
Diffstat (limited to 'arch/x86_64')
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86_64/bits/socket.h b/arch/x86_64/bits/socket.h
index 878ab117..a90c4cae 100644
--- a/arch/x86_64/bits/socket.h
+++ b/arch/x86_64/bits/socket.h
@@ -8,3 +8,11 @@ struct msghdr
socklen_t msg_controllen, __pad2;
int msg_flags;
+struct cmsghdr
+ socklen_t cmsg_len;
+ int __pad1;
+ int cmsg_level;
+ int cmsg_type;