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author | Rich Felker <dalias@aerifal.cx> | 2012-07-12 21:37:54 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2012-07-12 21:37:54 -0400 |
commit | 96107564e2eabbc13800fe7a7d930b67216d0805 (patch) | |
tree | c46507f195ab69f3ffacfdeca118e337e097849e /arch/x86_64 | |
parent | 90e123f4a810d17c6bd8c2102939f6416481427e (diff) | |
download | musl-96107564e2eabbc13800fe7a7d930b67216d0805.tar.gz musl-96107564e2eabbc13800fe7a7d930b67216d0805.tar.bz2 musl-96107564e2eabbc13800fe7a7d930b67216d0805.tar.xz musl-96107564e2eabbc13800fe7a7d930b67216d0805.zip |
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')
-rw-r--r-- | arch/x86_64/bits/socket.h | 8 |
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; +}; |