Revision f3ca4c55a6581c46e9f4a592dd698a7c67a713dd authored by Linus Torvalds on 14 March 2019, 16:28:12 UTC, committed by Linus Torvalds on 14 March 2019, 16:28:12 UTC
Pull networking fixes from David Miller:
 "More fixes in the queue:

  1) Netfilter nat can erroneously register the device notifier twice,
     fix from Florian Westphal.

  2) Use after free in nf_tables, from Pablo Neira Ayuso.

  3) Parallel update of steering rule fix in mlx5 river, from Eli
     Britstein.

  4) RX processing panic in lan743x, fix from Bryan Whitehead.

  5) Use before initialization of TCP_SKB_CB, fix from Christoph Paasch.

  6) Fix locking in SRIOV mode of mlx4 driver, from Jack Morgenstein.

  7) Fix TX stalls in lan743x due to mishandling of interrupt ACKing
     modes, from Bryan Whitehead.

  8) Fix infoleak in l2tp_ip6_recvmsg(), from Eric Dumazet"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (43 commits)
  pptp: dst_release sk_dst_cache in pptp_sock_destruct
  MAINTAINERS: GENET & SYSTEMPORT: Add internal Broadcom list
  l2tp: fix infoleak in l2tp_ip6_recvmsg()
  net/tls: Inform user space about send buffer availability
  net_sched: return correct value for *notify* functions
  lan743x: Fix TX Stall Issue
  net/mlx4_core: Fix qp mtt size calculation
  net/mlx4_core: Fix locking in SRIOV mode when switching between events and polling
  net/mlx4_core: Fix reset flow when in command polling mode
  mlxsw: minimal: Initialize base_mac
  mlxsw: core: Prevent duplication during QSFP module initialization
  net: dwmac-sun8i: fix a missing check of of_get_phy_mode
  net: sh_eth: fix a missing check of of_get_phy_mode
  net: 8390: fix potential NULL pointer dereferences
  net: fujitsu: fix a potential NULL pointer dereference
  net: qlogic: fix a potential NULL pointer dereference
  isdn: hfcpci: fix potential NULL pointer dereference
  Documentation: devicetree: add a new optional property for port mac address
  net: rocker: fix a potential NULL pointer dereference
  net: qlge: fix a potential NULL pointer dereference
  ...
2 parent s 31ef489 + 9417d81
Raw File
rodata_test.c
/*
 * rodata_test.c: functional test for mark_rodata_ro function
 *
 * (C) Copyright 2008 Intel Corporation
 * Author: Arjan van de Ven <arjan@linux.intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2
 * of the License.
 */
#define pr_fmt(fmt) "rodata_test: " fmt

#include <linux/uaccess.h>
#include <asm/sections.h>

static const int rodata_test_data = 0xC3;

void rodata_test(void)
{
	unsigned long start, end;
	int zero = 0;

	/* test 1: read the value */
	/* If this test fails, some previous testrun has clobbered the state */
	if (!rodata_test_data) {
		pr_err("test 1 fails (start data)\n");
		return;
	}

	/* test 2: write to the variable; this should fault */
	if (!probe_kernel_write((void *)&rodata_test_data,
				(void *)&zero, sizeof(zero))) {
		pr_err("test data was not read only\n");
		return;
	}

	/* test 3: check the value hasn't changed */
	if (rodata_test_data == zero) {
		pr_err("test data was changed\n");
		return;
	}

	/* test 4: check if the rodata section is PAGE_SIZE aligned */
	start = (unsigned long)__start_rodata;
	end = (unsigned long)__end_rodata;
	if (start & (PAGE_SIZE - 1)) {
		pr_err("start of .rodata is not page size aligned\n");
		return;
	}
	if (end & (PAGE_SIZE - 1)) {
		pr_err("end of .rodata is not page size aligned\n");
		return;
	}

	pr_info("all tests were successful\n");
}
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