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| author | Alexander Potapenko <glider@google.com> | 2017-03-08 18:08:16 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-20 10:04:53 +0100 |
| commit | accbd99507b1b22a0402cfd7b385a87a541f404d (patch) | |
| tree | daca33c653c77181eeb51057da8d83057ea85380 | |
| parent | b5213e1e9f25ccde958aa6364815ee87fef91100 (diff) | |
| download | linux-stable-accbd99507b1b22a0402cfd7b385a87a541f404d.tar.gz linux-stable-accbd99507b1b22a0402cfd7b385a87a541f404d.tar.bz2 linux-stable-accbd99507b1b22a0402cfd7b385a87a541f404d.zip | |
net: initialize msg.msg_flags in recvfrom
[ Upstream commit 9f138fa609c47403374a862a08a41394be53d461 ]
KMSAN reports a use of uninitialized memory in put_cmsg() because
msg.msg_flags in recvfrom haven't been initialized properly.
The flag values don't affect the result on this path, but it's still a
good idea to initialize them explicitly.
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/socket.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c index fbfa9d2492cf..2cf4f25f5c2b 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1697,6 +1697,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, /* We assume all kernel code knows the size of sockaddr_storage */ msg.msg_namelen = 0; msg.msg_iocb = NULL; + msg.msg_flags = 0; if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags); |