Revision 21f1b8a6636c4dbde4aa1ec0343f42eaf653ffcc authored by Paolo Abeni on 26 April 2019, 10:50:44 UTC, committed by David S. Miller on 28 April 2019, 02:07:24 UTC
Currently, the UDP GRO code path does bad things on some edge conditions - Aggregation can happen even on packet with different lengths. Fix the above by rewriting the 'complete' condition for GRO packets. While at it, note explicitly that we allow merging the first packet per burst below gso_size. Reported-by: Sean Tong <seantong114@gmail.com> Fixes: e20cf8d3f1f7 ("udp: implement GRO for plain UDP sockets.") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent fbef947
cpufeature.h
/*
* Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __LINUX_CPUFEATURE_H
#define __LINUX_CPUFEATURE_H
#ifdef CONFIG_GENERIC_CPU_AUTOPROBE
#include <linux/init.h>
#include <linux/mod_devicetable.h>
#include <asm/cpufeature.h>
/*
* Macros imported from <asm/cpufeature.h>:
* - cpu_feature(x) ordinal value of feature called 'x'
* - cpu_have_feature(u32 n) whether feature #n is available
* - MAX_CPU_FEATURES upper bound for feature ordinal values
* Optional:
* - CPU_FEATURE_TYPEFMT format string fragment for printing the cpu type
* - CPU_FEATURE_TYPEVAL set of values matching the format string above
*/
#ifndef CPU_FEATURE_TYPEFMT
#define CPU_FEATURE_TYPEFMT "%s"
#endif
#ifndef CPU_FEATURE_TYPEVAL
#define CPU_FEATURE_TYPEVAL ELF_PLATFORM
#endif
/*
* Use module_cpu_feature_match(feature, module_init_function) to
* declare that
* a) the module shall be probed upon discovery of CPU feature 'feature'
* (typically at boot time using udev)
* b) the module must not be loaded if CPU feature 'feature' is not present
* (not even by manual insmod).
*
* For a list of legal values for 'feature', please consult the file
* 'asm/cpufeature.h' of your favorite architecture.
*/
#define module_cpu_feature_match(x, __initfunc) \
static struct cpu_feature const __maybe_unused cpu_feature_match_ ## x[] = \
{ { .feature = cpu_feature(x) }, { } }; \
MODULE_DEVICE_TABLE(cpu, cpu_feature_match_ ## x); \
\
static int __init cpu_feature_match_ ## x ## _init(void) \
{ \
if (!cpu_have_feature(cpu_feature(x))) \
return -ENODEV; \
return __initfunc(); \
} \
module_init(cpu_feature_match_ ## x ## _init)
#endif
#endif
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