Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
bpf-next 2022-07-22

We've added 73 non-merge commits during the last 12 day(s) which contain
a total of 88 files changed, 3458 insertions(+), 860 deletions(-).

The main changes are:

1) Implement BPF trampoline for arm64 JIT, from Xu Kuohai.

2) Add ksyscall/kretsyscall section support to libbpf to simplify tracing kernel
   syscalls through kprobe mechanism, from Andrii Nakryiko.

3) Allow for livepatch (KLP) and BPF trampolines to attach to the same kernel
   function, from Song Liu & Jiri Olsa.

4) Add new kfunc infrastructure for netfilter's CT e.g. to insert and change
   entries, from Kumar Kartikeya Dwivedi & Lorenzo Bianconi.

5) Add a ksym BPF iterator to allow for more flexible and efficient interactions
   with kernel symbols, from Alan Maguire.

6) Bug fixes in libbpf e.g. for uprobe binary path resolution, from Dan Carpenter.

7) Fix BPF subprog function names in stack traces, from Alexei Starovoitov.

8) libbpf support for writing custom perf event readers, from Jon Doron.

9) Switch to use SPDX tag for BPF helper man page, from Alejandro Colomar.

10) Fix xsk send-only sockets when in busy poll mode, from Maciej Fijalkowski.

11) Reparent BPF maps and their charging on memcg offlining, from Roman Gushchin.

12) Multiple follow-up fixes around BPF lsm cgroup infra, from Stanislav Fomichev.

13) Use bootstrap version of bpftool where possible to speed up builds, from Pu Lehui.

14) Cleanup BPF verifier's check_func_arg() handling, from Joanne Koong.

15) Make non-prealloced BPF map allocations low priority to play better with
    memcg limits, from Yafang Shao.

16) Fix BPF test runner to reject zero-length data for skbs, from Zhengchao Shao.

17) Various smaller cleanups and improvements all over the place.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (73 commits)
  bpf: Simplify bpf_prog_pack_[size|mask]
  bpf: Support bpf_trampoline on functions with IPMODIFY (e.g. livepatch)
  bpf, x64: Allow to use caller address from stack
  ftrace: Allow IPMODIFY and DIRECT ops on the same function
  ftrace: Add modify_ftrace_direct_multi_nolock
  bpf/selftests: Fix couldn't retrieve pinned program in xdp veth test
  bpf: Fix build error in case of !CONFIG_DEBUG_INFO_BTF
  selftests/bpf: Fix test_verifier failed test in unprivileged mode
  selftests/bpf: Add negative tests for new nf_conntrack kfuncs
  selftests/bpf: Add tests for new nf_conntrack kfuncs
  selftests/bpf: Add verifier tests for trusted kfunc args
  net: netfilter: Add kfuncs to set and change CT status
  net: netfilter: Add kfuncs to set and change CT timeout
  net: netfilter: Add kfuncs to allocate and insert CT
  net: netfilter: Deduplicate code in bpf_{xdp,skb}_ct_lookup
  bpf: Add documentation for kfuncs
  bpf: Add support for forcing kfunc args to be trusted
  bpf: Switch to new kfunc flags infrastructure
  tools/resolve_btfids: Add support for 8-byte BTF sets
  bpf: Introduce 8-byte BTF set
  ...
====================

Link: https://lore.kernel.org/r/20220722221218.29943-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

10 files changed, 326 insertions, 59 deletions

diff --git a/tools/testing/selftests/bpf/progs/bpf_iter.h b/tools/testing/selftests/bpf/progs/bpf_iter.h
index 97ec8bc76ae6..e9846606690d 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter.h
+++ b/tools/testing/selftests/bpf/progs/bpf_iter.h
@@ -22,6 +22,7 @@
 #define BTF_F_NONAME BTF_F_NONAME___not_used
 #define BTF_F_PTR_RAW BTF_F_PTR_RAW___not_used
 #define BTF_F_ZERO BTF_F_ZERO___not_used
+#define bpf_iter__ksym bpf_iter__ksym___not_used
 #include "vmlinux.h"
 #undef bpf_iter_meta
 #undef bpf_iter__bpf_map
@@ -44,6 +45,7 @@
 #undef BTF_F_NONAME
 #undef BTF_F_PTR_RAW
 #undef BTF_F_ZERO
+#undef bpf_iter__ksym
 
 struct bpf_iter_meta {
 	struct seq_file *seq;
@@ -151,3 +153,8 @@ enum {
 	BTF_F_PTR_RAW	=	(1ULL << 2),
 	BTF_F_ZERO	=	(1ULL << 3),
 };
+
+struct bpf_iter__ksym {
+	struct bpf_iter_meta *meta;
+	struct kallsym_iter *ksym;
+};
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_ksym.c b/tools/testing/selftests/bpf/progs/bpf_iter_ksym.c
new file mode 100644
index 000000000000..285c008cbf9c
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_ksym.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2022, Oracle and/or its affiliates. */
+#include "bpf_iter.h"
+#include <bpf/bpf_helpers.h>
+
+char _license[] SEC("license") = "GPL";
+
+unsigned long last_sym_value = 0;
+
+static inline char tolower(char c)
+{
+	if (c >= 'A' && c <= 'Z')
+		c += ('a' - 'A');
+	return c;
+}
+
+static inline char toupper(char c)
+{
+	if (c >= 'a' && c <= 'z')
+		c -= ('a' - 'A');
+	return c;
+}
+
+/* Dump symbols with max size; the latter is calculated by caching symbol N value
+ * and when iterating on symbol N+1, we can print max size of symbol N via
+ * address of N+1 - address of N.
+ */
+SEC("iter/ksym")
+int dump_ksym(struct bpf_iter__ksym *ctx)
+{
+	struct seq_file *seq = ctx->meta->seq;
+	struct kallsym_iter *iter = ctx->ksym;
+	__u32 seq_num = ctx->meta->seq_num;
+	unsigned long value;
+	char type;
+	int ret;
+
+	if (!iter)
+		return 0;
+
+	if (seq_num == 0) {
+		BPF_SEQ_PRINTF(seq, "ADDR TYPE NAME MODULE_NAME KIND MAX_SIZE\n");
+		return 0;
+	}
+	if (last_sym_value)
+		BPF_SEQ_PRINTF(seq, "0x%x\n", iter->value - last_sym_value);
+	else
+		BPF_SEQ_PRINTF(seq, "\n");
+
+	value = iter->show_value ? iter->value : 0;
+
+	last_sym_value = value;
+
+	type = iter->type;
+
+	if (iter->module_name[0]) {
+		type = iter->exported ? toupper(type) : tolower(type);
+		BPF_SEQ_PRINTF(seq, "0x%llx %c %s [ %s ] ",
+			       value, type, iter->name, iter->module_name);
+	} else {
+		BPF_SEQ_PRINTF(seq, "0x%llx %c %s ", value, type, iter->name);
+	}
+	if (!iter->pos_arch_end || iter->pos_arch_end > iter->pos)
+		BPF_SEQ_PRINTF(seq, "CORE ");
+	else if (!iter->pos_mod_end || iter->pos_mod_end > iter->pos)
+		BPF_SEQ_PRINTF(seq, "MOD ");
+	else if (!iter->pos_ftrace_mod_end || iter->pos_ftrace_mod_end > iter->pos)
+		BPF_SEQ_PRINTF(seq, "FTRACE_MOD ");
+	else if (!iter->pos_bpf_end || iter->pos_bpf_end > iter->pos)
+		BPF_SEQ_PRINTF(seq, "BPF ");
+	else
+		BPF_SEQ_PRINTF(seq, "KPROBE ");
+	return 0;
+}
diff --git a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
index 05838ed9b89c..e1e11897e99b 100644
--- a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
+++ b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
@@ -64,9 +64,9 @@ int BPF_KPROBE(handle_sys_prctl)
 	return 0;
 }
 
-SEC("kprobe/" SYS_PREFIX "sys_prctl")
-int BPF_KPROBE_SYSCALL(prctl_enter, int option, unsigned long arg2,
-		       unsigned long arg3, unsigned long arg4, unsigned long arg5)
+SEC("ksyscall/prctl")
+int BPF_KSYSCALL(prctl_enter, int option, unsigned long arg2,
+		 unsigned long arg3, unsigned long arg4, unsigned long arg5)
 {
 	pid_t pid = bpf_get_current_pid_tgid() >> 32;
 
diff --git a/tools/testing/selftests/bpf/progs/test_attach_probe.c b/tools/testing/selftests/bpf/progs/test_attach_probe.c
index f1c88ad368ef..a1e45fec8938 100644
--- a/tools/testing/selftests/bpf/progs/test_attach_probe.c
+++ b/tools/testing/selftests/bpf/progs/test_attach_probe.c
@@ -1,11 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 // Copyright (c) 2017 Facebook
 
-#include <linux/ptrace.h>
-#include <linux/bpf.h>
+#include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
-#include <stdbool.h>
+#include <bpf/bpf_core_read.h>
 #include "bpf_misc.h"
 
 int kprobe_res = 0;
@@ -31,8 +30,8 @@ int handle_kprobe(struct pt_regs *ctx)
 	return 0;
 }
 
-SEC("kprobe/" SYS_PREFIX "sys_nanosleep")
-int BPF_KPROBE(handle_kprobe_auto)
+SEC("ksyscall/nanosleep")
+int BPF_KSYSCALL(handle_kprobe_auto, struct __kernel_timespec *req, struct __kernel_timespec *rem)
 {
 	kprobe2_res = 11;
 	return 0;
@@ -56,11 +55,11 @@ int handle_kretprobe(struct pt_regs *ctx)
 	return 0;
 }
 
-SEC("kretprobe/" SYS_PREFIX "sys_nanosleep")
-int BPF_KRETPROBE(handle_kretprobe_auto)
+SEC("kretsyscall/nanosleep")
+int BPF_KRETPROBE(handle_kretprobe_auto, int ret)
 {
 	kretprobe2_res = 22;
-	return 0;
+	return ret;
 }
 
 SEC("uprobe")
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf.c b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
index f00a9731930e..196cd8dfe42a 100644
--- a/tools/testing/selftests/bpf/progs/test_bpf_nf.c
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
@@ -8,6 +8,8 @@
 #define EINVAL 22
 #define ENOENT 2
 
+extern unsigned long CONFIG_HZ __kconfig;
+
 int test_einval_bpf_tuple = 0;
 int test_einval_reserved = 0;
 int test_einval_netns_id = 0;
@@ -16,6 +18,11 @@ int test_eproto_l4proto = 0;
 int test_enonet_netns_id = 0;
 int test_enoent_lookup = 0;
 int test_eafnosupport = 0;
+int test_alloc_entry = -EINVAL;
+int test_insert_entry = -EAFNOSUPPORT;
+int test_succ_lookup = -ENOENT;
+u32 test_delta_timeout = 0;
+u32 test_status = 0;
 
 struct nf_conn;
 
@@ -26,31 +33,44 @@ struct bpf_ct_opts___local {
 	u8 reserved[3];
 } __attribute__((preserve_access_index));
 
+struct nf_conn *bpf_xdp_ct_alloc(struct xdp_md *, struct bpf_sock_tuple *, u32,
+				 struct bpf_ct_opts___local *, u32) __ksym;
 struct nf_conn *bpf_xdp_ct_lookup(struct xdp_md *, struct bpf_sock_tuple *, u32,
 				  struct bpf_ct_opts___local *, u32) __ksym;
+struct nf_conn *bpf_skb_ct_alloc(struct __sk_buff *, struct bpf_sock_tuple *, u32,
+				 struct bpf_ct_opts___local *, u32) __ksym;
 struct nf_conn *bpf_skb_ct_lookup(struct __sk_buff *, struct bpf_sock_tuple *, u32,
 				  struct bpf_ct_opts___local *, u32) __ksym;
+struct nf_conn *bpf_ct_insert_entry(struct nf_conn *) __ksym;
 void bpf_ct_release(struct nf_conn *) __ksym;
+void bpf_ct_set_timeout(struct nf_conn *, u32) __ksym;
+int bpf_ct_change_timeout(struct nf_conn *, u32) __ksym;
+int bpf_ct_set_status(struct nf_conn *, u32) __ksym;
+int bpf_ct_change_status(struct nf_conn *, u32) __ksym;
 
 static __always_inline void
-nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
-				   struct bpf_ct_opts___local *, u32),
+nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
+					struct bpf_ct_opts___local *, u32),
+	   struct nf_conn *(*alloc_fn)(void *, struct bpf_sock_tuple *, u32,
+				       struct bpf_ct_opts___local *, u32),
 	   void *ctx)
 {
 	struct bpf_ct_opts___local opts_def = { .l4proto = IPPROTO_TCP, .netns_id = -1 };
 	struct bpf_sock_tuple bpf_tuple;
 	struct nf_conn *ct;
+	int err;
 
 	__builtin_memset(&bpf_tuple, 0, sizeof(bpf_tuple.ipv4));
 
-	ct = func(ctx, NULL, 0, &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, NULL, 0, &opts_def, sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_bpf_tuple = opts_def.error;
 
 	opts_def.reserved[0] = 1;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def));
 	opts_def.reserved[0] = 0;
 	opts_def.l4proto = IPPROTO_TCP;
 	if (ct)
@@ -59,21 +79,24 @@ nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
 		test_einval_reserved = opts_def.error;
 
 	opts_def.netns_id = -2;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def));
 	opts_def.netns_id = -1;
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_netns_id = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def) - 1);
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def) - 1);
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_len_opts = opts_def.error;
 
 	opts_def.l4proto = IPPROTO_ICMP;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def));
 	opts_def.l4proto = IPPROTO_TCP;
 	if (ct)
 		bpf_ct_release(ct);
@@ -81,37 +104,75 @@ nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
 		test_eproto_l4proto = opts_def.error;
 
 	opts_def.netns_id = 0xf00f;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def));
 	opts_def.netns_id = -1;
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_enonet_netns_id = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_enoent_lookup = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4) - 1, &opts_def, sizeof(opts_def));
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4) - 1, &opts_def,
+		       sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_eafnosupport = opts_def.error;
+
+	bpf_tuple.ipv4.saddr = bpf_get_prandom_u32(); /* src IP */
+	bpf_tuple.ipv4.daddr = bpf_get_prandom_u32(); /* dst IP */
+	bpf_tuple.ipv4.sport = bpf_get_prandom_u32(); /* src port */
+	bpf_tuple.ipv4.dport = bpf_get_prandom_u32(); /* dst port */
+
+	ct = alloc_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		      sizeof(opts_def));
+	if (ct) {
+		struct nf_conn *ct_ins;
+
+		bpf_ct_set_timeout(ct, 10000);
+		bpf_ct_set_status(ct, IPS_CONFIRMED);
+
+		ct_ins = bpf_ct_insert_entry(ct);
+		if (ct_ins) {
+			struct nf_conn *ct_lk;
+
+			ct_lk = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4),
+					  &opts_def, sizeof(opts_def));
+			if (ct_lk) {
+				/* update ct entry timeout */
+				bpf_ct_change_timeout(ct_lk, 10000);
+				test_delta_timeout = ct_lk->timeout - bpf_jiffies64();
+				test_delta_timeout /= CONFIG_HZ;
+				test_status = IPS_SEEN_REPLY;
+				bpf_ct_change_status(ct_lk, IPS_SEEN_REPLY);
+				bpf_ct_release(ct_lk);
+				test_succ_lookup = 0;
+			}
+			bpf_ct_release(ct_ins);
+			test_insert_entry = 0;
+		}
+		test_alloc_entry = 0;
+	}
 }
 
 SEC("xdp")
 int nf_xdp_ct_test(struct xdp_md *ctx)
 {
-	nf_ct_test((void *)bpf_xdp_ct_lookup, ctx);
+	nf_ct_test((void *)bpf_xdp_ct_lookup, (void *)bpf_xdp_ct_alloc, ctx);
 	return 0;
 }
 
 SEC("tc")
 int nf_skb_ct_test(struct __sk_buff *ctx)
 {
-	nf_ct_test((void *)bpf_skb_ct_lookup, ctx);
+	nf_ct_test((void *)bpf_skb_ct_lookup, (void *)bpf_skb_ct_alloc, ctx);
 	return 0;
 }
 
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c b/tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c
new file mode 100644
index 000000000000..bf79af15c808
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <vmlinux.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_core_read.h>
+
+struct nf_conn;
+
+struct bpf_ct_opts___local {
+	s32 netns_id;
+	s32 error;
+	u8 l4proto;
+	u8 reserved[3];
+} __attribute__((preserve_access_index));
+
+struct nf_conn *bpf_skb_ct_alloc(struct __sk_buff *, struct bpf_sock_tuple *, u32,
+				 struct bpf_ct_opts___local *, u32) __ksym;
+struct nf_conn *bpf_skb_ct_lookup(struct __sk_buff *, struct bpf_sock_tuple *, u32,
+				  struct bpf_ct_opts___local *, u32) __ksym;
+struct nf_conn *bpf_ct_insert_entry(struct nf_conn *) __ksym;
+void bpf_ct_release(struct nf_conn *) __ksym;
+void bpf_ct_set_timeout(struct nf_conn *, u32) __ksym;
+int bpf_ct_change_timeout(struct nf_conn *, u32) __ksym;
+int bpf_ct_set_status(struct nf_conn *, u32) __ksym;
+int bpf_ct_change_status(struct nf_conn *, u32) __ksym;
+
+SEC("?tc")
+int alloc_release(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	bpf_ct_release(ct);
+	return 0;
+}
+
+SEC("?tc")
+int insert_insert(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	ct = bpf_ct_insert_entry(ct);
+	if (!ct)
+		return 0;
+	ct = bpf_ct_insert_entry(ct);
+	return 0;
+}
+
+SEC("?tc")
+int lookup_insert(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_lookup(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	bpf_ct_insert_entry(ct);
+	return 0;
+}
+
+SEC("?tc")
+int set_timeout_after_insert(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	ct = bpf_ct_insert_entry(ct);
+	if (!ct)
+		return 0;
+	bpf_ct_set_timeout(ct, 0);
+	return 0;
+}
+
+SEC("?tc")
+int set_status_after_insert(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	ct = bpf_ct_insert_entry(ct);
+	if (!ct)
+		return 0;
+	bpf_ct_set_status(ct, 0);
+	return 0;
+}
+
+SEC("?tc")
+int change_timeout_after_alloc(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	bpf_ct_change_timeout(ct, 0);
+	return 0;
+}
+
+SEC("?tc")
+int change_status_after_alloc(struct __sk_buff *ctx)
+{
+	struct bpf_ct_opts___local opts = {};
+	struct bpf_sock_tuple tup = {};
+	struct nf_conn *ct;
+
+	ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
+	if (!ct)
+		return 0;
+	bpf_ct_change_status(ct, 0);
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/test_core_extern.c b/tools/testing/selftests/bpf/progs/test_core_extern.c
index 3ac3603ad53d..a3c7c1042f35 100644
--- a/tools/testing/selftests/bpf/progs/test_core_extern.c
+++ b/tools/testing/selftests/bpf/progs/test_core_extern.c
@@ -11,6 +11,7 @@
 static int (*bpf_missing_helper)(const void *arg1, int arg2) = (void *) 999;
 
 extern int LINUX_KERNEL_VERSION __kconfig;
+extern int LINUX_UNKNOWN_VIRTUAL_EXTERN __kconfig __weak;
 extern bool CONFIG_BPF_SYSCALL __kconfig; /* strong */
 extern enum libbpf_tristate CONFIG_TRISTATE __kconfig __weak;
 extern bool CONFIG_BOOL __kconfig __weak;
@@ -22,6 +23,7 @@ extern const char CONFIG_STR[8] __kconfig __weak;
 extern uint64_t CONFIG_MISSING __kconfig __weak;
 
 uint64_t kern_ver = -1;
+uint64_t unkn_virt_val = -1;
 uint64_t bpf_syscall = -1;
 uint64_t tristate_val = -1;
 uint64_t bool_val = -1;
@@ -38,6 +40,7 @@ int handle_sys_enter(struct pt_regs *ctx)
 	int i;
 
 	kern_ver = LINUX_KERNEL_VERSION;
+	unkn_virt_val = LINUX_UNKNOWN_VIRTUAL_EXTERN;
 	bpf_syscall = CONFIG_BPF_SYSCALL;
 	tristate_val = CONFIG_TRISTATE;
 	bool_val = CONFIG_BOOL;
diff --git a/tools/testing/selftests/bpf/progs/test_probe_user.c b/tools/testing/selftests/bpf/progs/test_probe_user.c
index 702578a5e496..8e1495008e4d 100644
--- a/tools/testing/selftests/bpf/progs/test_probe_user.c
+++ b/tools/testing/selftests/bpf/progs/test_probe_user.c
@@ -1,35 +1,20 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#include <linux/ptrace.h>
-#include <linux/bpf.h>
-
-#include <netinet/in.h>
-
+#include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
 #include "bpf_misc.h"
 
 static struct sockaddr_in old;
 
-SEC("kprobe/" SYS_PREFIX "sys_connect")
-int BPF_KPROBE(handle_sys_connect)
+SEC("ksyscall/connect")
+int BPF_KSYSCALL(handle_sys_connect, int fd, struct sockaddr_in *uservaddr, int addrlen)
 {
-#if SYSCALL_WRAPPER == 1
-	struct pt_regs *real_regs;
-#endif
 	struct sockaddr_in new;
-	void *ptr;
-
-#if SYSCALL_WRAPPER == 0
-	ptr = (void *)PT_REGS_PARM2(ctx);
-#else
-	real_regs = (struct pt_regs *)PT_REGS_PARM1(ctx);
-	bpf_probe_read_kernel(&ptr, sizeof(ptr), &PT_REGS_PARM2(real_regs));
-#endif
 
-	bpf_probe_read_user(&old, sizeof(old), ptr);
+	bpf_probe_read_user(&old, sizeof(old), uservaddr);
 	__builtin_memset(&new, 0xab, sizeof(new));
-	bpf_probe_write_user(ptr, &new, sizeof(new));
+	bpf_probe_write_user(uservaddr, &new, sizeof(new));
 
 	return 0;
 }
diff --git a/tools/testing/selftests/bpf/progs/test_skeleton.c b/tools/testing/selftests/bpf/progs/test_skeleton.c
index 1b1187d2967b..1a4e93f6d9df 100644
--- a/tools/testing/selftests/bpf/progs/test_skeleton.c
+++ b/tools/testing/selftests/bpf/progs/test_skeleton.c
@@ -51,6 +51,8 @@ int out_dynarr[4] SEC(".data.dyn") = { 1, 2, 3, 4 };
 int read_mostly_var __read_mostly;
 int out_mostly_var;
 
+char huge_arr[16 * 1024 * 1024];
+
 SEC("raw_tp/sys_enter")
 int handler(const void *ctx)
 {
@@ -71,6 +73,8 @@ int handler(const void *ctx)
 
 	out_mostly_var = read_mostly_var;
 
+	huge_arr[sizeof(huge_arr) - 1] = 123;
+
 	return 0;
 }
 
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
index 125d872d7981..ba48fcb98ab2 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
@@ -239,7 +239,7 @@ bool parse_udp(void *data, void *data_end,
 	udp = data + off;
 
 	if (udp + 1 > data_end)
-		return 0;
+		return false;
 	if (!is_icmp) {
 		pckt->flow.port16[0] = udp->source;
 		pckt->flow.port16[1] = udp->dest;
@@ -247,7 +247,7 @@ bool parse_udp(void *data, void *data_end,
 		pckt->flow.port16[0] = udp->dest;
 		pckt->flow.port16[1] = udp->source;
 	}
-	return 1;
+	return true;
 }
 
 static __attribute__ ((noinline))
@@ -261,7 +261,7 @@ bool parse_tcp(void *data, void *data_end,
 
 	tcp = data + off;
 	if (tcp + 1 > data_end)
-		return 0;
+		return false;
 	if (tcp->syn)
 		pckt->flags |= (1 << 1);
 	if (!is_icmp) {
@@ -271,7 +271,7 @@ bool parse_tcp(void *data, void *data_end,
 		pckt->flow.port16[0] = tcp->dest;
 		pckt->flow.port16[1] = tcp->source;
 	}
-	return 1;
+	return true;
 }
 
 static __attribute__ ((noinline))
@@ -287,7 +287,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
 	void *data;
 
 	if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct ipv6hdr)))
-		return 0;
+		return false;
 	data = (void *)(long)xdp->data;
 	data_end = (void *)(long)xdp->data_end;
 	new_eth = data;
@@ -295,7 +295,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
 	old_eth = data + sizeof(struct ipv6hdr);
 	if (new_eth + 1 > data_end ||
 	    old_eth + 1 > data_end || ip6h + 1 > data_end)
-		return 0;
+		return false;
 	memcpy(new_eth->eth_dest, cval->mac, 6);
 	memcpy(new_eth->eth_source, old_eth->eth_dest, 6);
 	new_eth->eth_proto = 56710;
@@ -314,7 +314,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
 	ip6h->saddr.in6_u.u6_addr32[2] = 3;
 	ip6h->saddr.in6_u.u6_addr32[3] = ip_suffix;
 	memcpy(ip6h->daddr.in6_u.u6_addr32, dst->dstv6, 16);
-	return 1;
+	return true;
 }
 
 static __attribute__ ((noinline))
@@ -335,7 +335,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
 	ip_suffix <<= 15;
 	ip_suffix ^= pckt->flow.src;
 	if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct iphdr)))
-		return 0;
+		return false;
 	data = (void *)(long)xdp->data;
 	data_end = (void *)(long)xdp->data_end;
 	new_eth = data;
@@ -343,7 +343,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
 	old_eth = data + sizeof(struct iphdr);
 	if (new_eth + 1 > data_end ||
 	    old_eth + 1 > data_end || iph + 1 > data_end)
-		return 0;
+		return false;
 	memcpy(new_eth->eth_dest, cval->mac, 6);
 	memcpy(new_eth->eth_source, old_eth->eth_dest, 6);
 	new_eth->eth_proto = 8;
@@ -367,8 +367,8 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
 		csum += *next_iph_u16++;
 	iph->check = ~((csum & 0xffff) + (csum >> 16));
 	if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct iphdr)))
-		return 0;
-	return 1;
+		return false;
+	return true;
 }
 
 static __attribute__ ((noinline))
@@ -386,10 +386,10 @@ bool decap_v6(struct xdp_md *xdp, void **data, void **data_end, bool inner_v4)
 	else
 		new_eth->eth_proto = 56710;
 	if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct ipv6hdr)))
-		return 0;
+		return false;
 	*data = (void *)(long)xdp->data;
 	*data_end = (void *)(long)xdp->data_end;
-	return 1;
+	return true;
 }
 
 static __attribute__ ((noinline))
@@ -404,10 +404,10 @@ bool decap_v4(struct xdp_md *xdp, void **data, void **data_end)
 	memcpy(new_eth->eth_dest, old_eth->eth_dest, 6);
 	new_eth->eth_proto = 8;
 	if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct iphdr)))
-		return 0;
+		return false;
 	*data = (void *)(long)xdp->data;
 	*data_end = (void *)(long)xdp->data_end;
-	return 1;
+	return true;
 }
 
 static __attribute__ ((noinline))