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Jonas Jensen c2b341a620 net: moxa: fix TX overrun memory leak
moxart_mac_start_xmit() doesn't care where tx_tail is, tx_head can
catch and pass tx_tail, which is bad because moxart_tx_finished()
isn't guaranteed to catch up on freeing resources from tx_tail.

Add a check in moxart_mac_start_xmit() stopping the queue at the
end of the circular buffer. Also add a check in moxart_tx_finished()
waking the queue if the buffer has TX_WAKE_THRESHOLD or more
free descriptors.

While we're at it, move spin_lock_irq() to happen before our
descriptor pointer is assigned in moxart_mac_start_xmit().

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=99451

Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-28 18:02:05 -07:00
arch
block
certs
crypto
Documentation
drivers net: moxa: fix TX overrun memory leak 2017-03-28 18:02:05 -07:00
firmware
fs
include sctp: change to save MSG_MORE flag into assoc 2017-03-28 17:56:15 -07:00
init
ipc
kernel bpf: improve verifier packet range checks 2017-03-24 20:51:28 -07:00
lib
mm
net sctp: change to save MSG_MORE flag into assoc 2017-03-28 17:56:15 -07:00
samples
scripts
security
sound
tools bpf: improve verifier packet range checks 2017-03-24 20:51:28 -07:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
CREDITS
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MAINTAINERS MAINTAINERS: Add Andrew Lunn as co-maintainer of PHYLIB 2017-03-27 16:49:27 -07:00
Makefile
README

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

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.