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Willem de Bruijn a200e439c0 net/packet: tpacket_rcv: do not increment ring index on drop
[ Upstream commit 46e4c421a053c36bf7a33dda2272481bcaf3eed3 ]

In one error case, tpacket_rcv drops packets after incrementing the
ring producer index.

If this happens, it does not update tp_status to TP_STATUS_USER and
thus the reader is stalled for an iteration of the ring, causing out
of order arrival.

The only such error path is when virtio_net_hdr_from_skb fails due
to encountering an unknown GSO type.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-18 07:17:41 +01:00
arch csky: Implement copy_thread_tls 2020-03-12 13:00:32 +01:00
block block, bfq: remove ifdefs from around gets/puts of bfq groups 2020-03-12 13:00:32 +01:00
certs
crypto
Documentation
drivers net: macsec: update SCI upon MAC address change. 2020-03-18 07:17:40 +01:00
fs
include inet_diag: return classid for all socket types 2020-03-18 07:17:38 +01:00
init
ipc
kernel
lib
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mm
net net/packet: tpacket_rcv: do not increment ring index on drop 2020-03-18 07:17:41 +01:00
samples
scripts
security
sound ALSA: hda/realtek - Fixed one of HP ALC671 platform Headset Mic supported 2020-03-18 07:17:38 +01:00
tools perf arm-spe: Fix endless record after being terminated 2020-03-12 13:00:22 +01:00
usr
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Makefile Linux 5.4.25 2020-03-12 13:00:32 +01:00
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.