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Willem de Bruijn b2cf86e156 packet: in recvmsg msg_name return at least sizeof sockaddr_ll
Packet send checks that msg_name is at least sizeof sockaddr_ll.
Packet recv must return at least this length, so that its output
can be passed unmodified to packet send.

This ceased to be true since adding support for lladdr longer than
sll_addr. Since, the return value uses true address length.

Always return at least sizeof sockaddr_ll, even if address length
is shorter. Zero the padding bytes.

Change v1->v2: do not overwrite zeroed padding again. use copy_len.

Fixes: 0fb375fb9b ("[AF_PACKET]: Allow for > 8 byte hardware addresses.")
Suggested-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-01 11:27:55 -04:00
arch
block
certs
crypto
Documentation Documentation: fix netdev-FAQ.rst markup warning 2019-05-01 09:12:51 -04:00
drivers stmmac: pci: Fix typo in IOT2000 comment 2019-05-01 09:15:52 -04:00
fs
include sctp: avoid running the sctp state machine recursively 2019-05-01 09:18:57 -04:00
init
ipc
kernel
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LICENSES
mm
net packet: in recvmsg msg_name return at least sizeof sockaddr_ll 2019-05-01 11:27:55 -04:00
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.cocciconfig
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.