Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 370 insertions, 0 deletions

diff --git a/tools/testing/selftests/arm64/pauth/pac.c b/tools/testing/selftests/arm64/pauth/pac.c
new file mode 100644
index 000000000..b743daa77
--- /dev/null
+++ b/tools/testing/selftests/arm64/pauth/pac.c
@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2020 ARM Limited
+
+#define _GNU_SOURCE
+
+#include <sys/auxv.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <sched.h>
+
+#include "../../kselftest_harness.h"
+#include "helper.h"
+
+#define PAC_COLLISION_ATTEMPTS 10
+/*
+ * The kernel sets TBID by default. So bits 55 and above should remain
+ * untouched no matter what.
+ * The VA space size is 48 bits. Bigger is opt-in.
+ */
+#define PAC_MASK (~0xff80ffffffffffff)
+#define ARBITRARY_VALUE (0x1234)
+#define ASSERT_PAUTH_ENABLED() \
+do { \
+	unsigned long hwcaps = getauxval(AT_HWCAP); \
+	/* data key instructions are not in NOP space. This prevents a SIGILL */ \
+	if (!(hwcaps & HWCAP_PACA))					\
+		SKIP(return, "PAUTH not enabled"); \
+} while (0)
+#define ASSERT_GENERIC_PAUTH_ENABLED() \
+do { \
+	unsigned long hwcaps = getauxval(AT_HWCAP); \
+	/* generic key instructions are not in NOP space. This prevents a SIGILL */ \
+	if (!(hwcaps & HWCAP_PACG)) \
+		SKIP(return, "Generic PAUTH not enabled");	\
+} while (0)
+
+void sign_specific(struct signatures *sign, size_t val)
+{
+	sign->keyia = keyia_sign(val);
+	sign->keyib = keyib_sign(val);
+	sign->keyda = keyda_sign(val);
+	sign->keydb = keydb_sign(val);
+}
+
+void sign_all(struct signatures *sign, size_t val)
+{
+	sign->keyia = keyia_sign(val);
+	sign->keyib = keyib_sign(val);
+	sign->keyda = keyda_sign(val);
+	sign->keydb = keydb_sign(val);
+	sign->keyg  = keyg_sign(val);
+}
+
+int n_same(struct signatures *old, struct signatures *new, int nkeys)
+{
+	int res = 0;
+
+	res += old->keyia == new->keyia;
+	res += old->keyib == new->keyib;
+	res += old->keyda == new->keyda;
+	res += old->keydb == new->keydb;
+	if (nkeys == NKEYS)
+		res += old->keyg == new->keyg;
+
+	return res;
+}
+
+int n_same_single_set(struct signatures *sign, int nkeys)
+{
+	size_t vals[nkeys];
+	int same = 0;
+
+	vals[0] = sign->keyia & PAC_MASK;
+	vals[1] = sign->keyib & PAC_MASK;
+	vals[2] = sign->keyda & PAC_MASK;
+	vals[3] = sign->keydb & PAC_MASK;
+
+	if (nkeys >= 4)
+		vals[4] = sign->keyg & PAC_MASK;
+
+	for (int i = 0; i < nkeys - 1; i++) {
+		for (int j = i + 1; j < nkeys; j++) {
+			if (vals[i] == vals[j])
+				same += 1;
+		}
+	}
+	return same;
+}
+
+int exec_sign_all(struct signatures *signed_vals, size_t val)
+{
+	int new_stdin[2];
+	int new_stdout[2];
+	int status;
+	int i;
+	ssize_t ret;
+	pid_t pid;
+	cpu_set_t mask;
+
+	ret = pipe(new_stdin);
+	if (ret == -1) {
+		perror("pipe returned error");
+		return -1;
+	}
+
+	ret = pipe(new_stdout);
+	if (ret == -1) {
+		perror("pipe returned error");
+		return -1;
+	}
+
+	/*
+	 * pin this process and all its children to a single CPU, so it can also
+	 * guarantee a context switch with its child
+	 */
+	sched_getaffinity(0, sizeof(mask), &mask);
+
+	for (i = 0; i < sizeof(cpu_set_t); i++)
+		if (CPU_ISSET(i, &mask))
+			break;
+
+	CPU_ZERO(&mask);
+	CPU_SET(i, &mask);
+	sched_setaffinity(0, sizeof(mask), &mask);
+
+	pid = fork();
+	// child
+	if (pid == 0) {
+		dup2(new_stdin[0], STDIN_FILENO);
+		if (ret == -1) {
+			perror("dup2 returned error");
+			exit(1);
+		}
+
+		dup2(new_stdout[1], STDOUT_FILENO);
+		if (ret == -1) {
+			perror("dup2 returned error");
+			exit(1);
+		}
+
+		close(new_stdin[0]);
+		close(new_stdin[1]);
+		close(new_stdout[0]);
+		close(new_stdout[1]);
+
+		ret = execl("exec_target", "exec_target", (char *)NULL);
+		if (ret == -1) {
+			perror("exec returned error");
+			exit(1);
+		}
+	}
+
+	close(new_stdin[0]);
+	close(new_stdout[1]);
+
+	ret = write(new_stdin[1], &val, sizeof(size_t));
+	if (ret == -1) {
+		perror("write returned error");
+		return -1;
+	}
+
+	/*
+	 * wait for the worker to finish, so that read() reads all data
+	 * will also context switch with worker so that this function can be used
+	 * for context switch tests
+	 */
+	waitpid(pid, &status, 0);
+	if (WIFEXITED(status) == 0) {
+		fprintf(stderr, "worker exited unexpectedly\n");
+		return -1;
+	}
+	if (WEXITSTATUS(status) != 0) {
+		fprintf(stderr, "worker exited with error\n");
+		return -1;
+	}
+
+	ret = read(new_stdout[0], signed_vals, sizeof(struct signatures));
+	if (ret == -1) {
+		perror("read returned error");
+		return -1;
+	}
+
+	return 0;
+}
+
+sigjmp_buf jmpbuf;
+void pac_signal_handler(int signum, siginfo_t *si, void *uc)
+{
+	if (signum == SIGSEGV || signum == SIGILL)
+		siglongjmp(jmpbuf, 1);
+}
+
+/* check that a corrupted PAC results in SIGSEGV or SIGILL */
+TEST(corrupt_pac)
+{
+	struct sigaction sa;
+
+	ASSERT_PAUTH_ENABLED();
+	if (sigsetjmp(jmpbuf, 1) == 0) {
+		sa.sa_sigaction = pac_signal_handler;
+		sa.sa_flags = SA_SIGINFO | SA_RESETHAND;
+		sigemptyset(&sa.sa_mask);
+
+		sigaction(SIGSEGV, &sa, NULL);
+		sigaction(SIGILL, &sa, NULL);
+
+		pac_corruptor();
+		ASSERT_TRUE(0) TH_LOG("SIGSEGV/SIGILL signal did not occur");
+	}
+}
+
+/*
+ * There are no separate pac* and aut* controls so checking only the pac*
+ * instructions is sufficient
+ */
+TEST(pac_instructions_not_nop)
+{
+	size_t keyia = 0;
+	size_t keyib = 0;
+	size_t keyda = 0;
+	size_t keydb = 0;
+
+	ASSERT_PAUTH_ENABLED();
+
+	for (int i = 0; i < PAC_COLLISION_ATTEMPTS; i++) {
+		keyia |= keyia_sign(i) & PAC_MASK;
+		keyib |= keyib_sign(i) & PAC_MASK;
+		keyda |= keyda_sign(i) & PAC_MASK;
+		keydb |= keydb_sign(i) & PAC_MASK;
+	}
+
+	ASSERT_NE(0, keyia) TH_LOG("keyia instructions did nothing");
+	ASSERT_NE(0, keyib) TH_LOG("keyib instructions did nothing");
+	ASSERT_NE(0, keyda) TH_LOG("keyda instructions did nothing");
+	ASSERT_NE(0, keydb) TH_LOG("keydb instructions did nothing");
+}
+
+TEST(pac_instructions_not_nop_generic)
+{
+	size_t keyg = 0;
+
+	ASSERT_GENERIC_PAUTH_ENABLED();
+
+	for (int i = 0; i < PAC_COLLISION_ATTEMPTS; i++)
+		keyg |= keyg_sign(i) & PAC_MASK;
+
+	ASSERT_NE(0, keyg)  TH_LOG("keyg instructions did nothing");
+}
+
+TEST(single_thread_different_keys)
+{
+	int same = 10;
+	int nkeys = NKEYS;
+	int tmp;
+	struct signatures signed_vals;
+	unsigned long hwcaps = getauxval(AT_HWCAP);
+
+	/* generic and data key instructions are not in NOP space. This prevents a SIGILL */
+	ASSERT_PAUTH_ENABLED();
+	if (!(hwcaps & HWCAP_PACG)) {
+		TH_LOG("WARNING: Generic PAUTH not enabled. Skipping generic key checks");
+		nkeys = NKEYS - 1;
+	}
+
+	/*
+	 * In Linux the PAC field can be up to 7 bits wide. Even if keys are
+	 * different, there is about 5% chance for PACs to collide with
+	 * different addresses. This chance rapidly increases with fewer bits
+	 * allocated for the PAC (e.g. wider address). A comparison of the keys
+	 * directly will be more reliable.
+	 * All signed values need to be different at least once out of n
+	 * attempts to be certain that the keys are different
+	 */
+	for (int i = 0; i < PAC_COLLISION_ATTEMPTS; i++) {
+		if (nkeys == NKEYS)
+			sign_all(&signed_vals, i);
+		else
+			sign_specific(&signed_vals, i);
+
+		tmp = n_same_single_set(&signed_vals, nkeys);
+		if (tmp < same)
+			same = tmp;
+	}
+
+	ASSERT_EQ(0, same) TH_LOG("%d keys clashed every time", same);
+}
+
+/*
+ * fork() does not change keys. Only exec() does so call a worker program.
+ * Its only job is to sign a value and report back the resutls
+ */
+TEST(exec_changed_keys)
+{
+	struct signatures new_keys;
+	struct signatures old_keys;
+	int ret;
+	int same = 10;
+	int nkeys = NKEYS;
+	unsigned long hwcaps = getauxval(AT_HWCAP);
+
+	/* generic and data key instructions are not in NOP space. This prevents a SIGILL */
+	ASSERT_PAUTH_ENABLED();
+	if (!(hwcaps & HWCAP_PACG)) {
+		TH_LOG("WARNING: Generic PAUTH not enabled. Skipping generic key checks");
+		nkeys = NKEYS - 1;
+	}
+
+	for (int i = 0; i < PAC_COLLISION_ATTEMPTS; i++) {
+		ret = exec_sign_all(&new_keys, i);
+		ASSERT_EQ(0, ret) TH_LOG("failed to run worker");
+
+		if (nkeys == NKEYS)
+			sign_all(&old_keys, i);
+		else
+			sign_specific(&old_keys, i);
+
+		ret = n_same(&old_keys, &new_keys, nkeys);
+		if (ret < same)
+			same = ret;
+	}
+
+	ASSERT_EQ(0, same) TH_LOG("exec() did not change %d keys", same);
+}
+
+TEST(context_switch_keep_keys)
+{
+	int ret;
+	struct signatures trash;
+	struct signatures before;
+	struct signatures after;
+
+	ASSERT_PAUTH_ENABLED();
+
+	sign_specific(&before, ARBITRARY_VALUE);
+
+	/* will context switch with a process with different keys at least once */
+	ret = exec_sign_all(&trash, ARBITRARY_VALUE);
+	ASSERT_EQ(0, ret) TH_LOG("failed to run worker");
+
+	sign_specific(&after, ARBITRARY_VALUE);
+
+	ASSERT_EQ(before.keyia, after.keyia) TH_LOG("keyia changed after context switching");
+	ASSERT_EQ(before.keyib, after.keyib) TH_LOG("keyib changed after context switching");
+	ASSERT_EQ(before.keyda, after.keyda) TH_LOG("keyda changed after context switching");
+	ASSERT_EQ(before.keydb, after.keydb) TH_LOG("keydb changed after context switching");
+}
+
+TEST(context_switch_keep_keys_generic)
+{
+	int ret;
+	struct signatures trash;
+	size_t before;
+	size_t after;
+
+	ASSERT_GENERIC_PAUTH_ENABLED();
+
+	before = keyg_sign(ARBITRARY_VALUE);
+
+	/* will context switch with a process with different keys at least once */
+	ret = exec_sign_all(&trash, ARBITRARY_VALUE);
+	ASSERT_EQ(0, ret) TH_LOG("failed to run worker");
+
+	after = keyg_sign(ARBITRARY_VALUE);
+
+	ASSERT_EQ(before, after) TH_LOG("keyg changed after context switching");
+}
+
+TEST_HARNESS_MAIN