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Al Viro a8866ff6a5 netlink: make the check for "send from tx_ring" deterministic

As it is, zero msg_iovlen means that the first iovec in the kernel
array of iovecs is left uninitialized, so checking if its ->iov_base
is NULL is random.  Since the real users of that thing are doing
sendto(fd, NULL, 0, ...), they are getting msg_iovlen = 1 and
msg_iov[0] = {NULL, 0}, which is what this test is trying to catch.
As suggested by davem, let's just check that msg_iovlen was 1 and
msg_iov[0].iov_base was NULL - _that_ is well-defined and it catches
what we want to catch.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2015-02-04 01:34:13 -05:00

af_netlink.c

netlink: make the check for "send from tx_ring" deterministic

2015-02-04 01:34:13 -05:00

af_netlink.h

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2015-01-27 16:59:56 -08:00

diag.c

netlink: make nlmsg_end() and genlmsg_end() void

2015-01-18 01:03:45 -05:00

genetlink.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net