diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
index 9ecde517728c317ac7428efd616536a0a90f301e..2793d4eac55fd7e12993b3045657fd4156499d06 100644
--- a/Documentation/sysctl/net.txt
+++ b/Documentation/sysctl/net.txt
@@ -92,6 +92,14 @@ Values :
 	0 - disable JIT kallsyms export (default value)
 	1 - enable JIT kallsyms export for privileged users only
 
+bpf_jit_limit
+-------------
+
+This enforces a global limit for memory allocations to the BPF JIT
+compiler in order to reject unprivileged JIT requests once it has
+been surpassed. bpf_jit_limit contains the value of the global limit
+in bytes.
+
 dev_weight
 --------------
 
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 91b4c934f02e7ca0f8aa3c8dfcc6f51233d7d05e..de629b706d1d7dda246819ed37109f098c05785e 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -854,6 +854,7 @@ bpf_run_sk_reuseport(struct sock_reuseport *reuse, struct sock *sk,
 extern int bpf_jit_enable;
 extern int bpf_jit_harden;
 extern int bpf_jit_kallsyms;
+extern int bpf_jit_limit;
 
 typedef void (*bpf_jit_fill_hole_t)(void *area, unsigned int size);
 
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 378cef70341c4e5b4b137bac7ed84aab75529af0..ee4c82667d659019022f42cfc3c4a13cf9fc9124 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -2067,56 +2067,47 @@ static int btf_check_sec_info(struct btf_verifier_env *env,
 	return 0;
 }
 
-static int btf_parse_hdr(struct btf_verifier_env *env, void __user *btf_data,
-			 u32 btf_data_size)
+static int btf_parse_hdr(struct btf_verifier_env *env)
 {
+	u32 hdr_len, hdr_copy, btf_data_size;
 	const struct btf_header *hdr;
-	u32 hdr_len, hdr_copy;
-	/*
-	 * Minimal part of the "struct btf_header" that
-	 * contains the hdr_len.
-	 */
-	struct btf_min_header {
-		u16	magic;
-		u8	version;
-		u8	flags;
-		u32	hdr_len;
-	} __user *min_hdr;
 	struct btf *btf;
 	int err;
 
 	btf = env->btf;
-	min_hdr = btf_data;
+	btf_data_size = btf->data_size;
 
-	if (btf_data_size < sizeof(*min_hdr)) {
+	if (btf_data_size <
+	    offsetof(struct btf_header, hdr_len) + sizeof(hdr->hdr_len)) {
 		btf_verifier_log(env, "hdr_len not found");
 		return -EINVAL;
 	}
 
-	if (get_user(hdr_len, &min_hdr->hdr_len))
-		return -EFAULT;
-
+	hdr = btf->data;
+	hdr_len = hdr->hdr_len;
 	if (btf_data_size < hdr_len) {
 		btf_verifier_log(env, "btf_header not found");
 		return -EINVAL;
 	}
 
-	err = bpf_check_uarg_tail_zero(btf_data, sizeof(btf->hdr), hdr_len);
-	if (err) {
-		if (err == -E2BIG)
-			btf_verifier_log(env, "Unsupported btf_header");
-		return err;
+	/* Ensure the unsupported header fields are zero */
+	if (hdr_len > sizeof(btf->hdr)) {
+		u8 *expected_zero = btf->data + sizeof(btf->hdr);
+		u8 *end = btf->data + hdr_len;
+
+		for (; expected_zero < end; expected_zero++) {
+			if (*expected_zero) {
+				btf_verifier_log(env, "Unsupported btf_header");
+				return -E2BIG;
+			}
+		}
 	}
 
 	hdr_copy = min_t(u32, hdr_len, sizeof(btf->hdr));
-	if (copy_from_user(&btf->hdr, btf_data, hdr_copy))
-		return -EFAULT;
+	memcpy(&btf->hdr, btf->data, hdr_copy);
 
 	hdr = &btf->hdr;
 
-	if (hdr->hdr_len != hdr_len)
-		return -EINVAL;
-
 	btf_verifier_log_hdr(env, btf_data_size);
 
 	if (hdr->magic != BTF_MAGIC) {
@@ -2186,10 +2177,6 @@ static struct btf *btf_parse(void __user *btf_data, u32 btf_data_size,
 	}
 	env->btf = btf;
 
-	err = btf_parse_hdr(env, btf_data, btf_data_size);
-	if (err)
-		goto errout;
-
 	data = kvmalloc(btf_data_size, GFP_KERNEL | __GFP_NOWARN);
 	if (!data) {
 		err = -ENOMEM;
@@ -2198,13 +2185,18 @@ static struct btf *btf_parse(void __user *btf_data, u32 btf_data_size,
 
 	btf->data = data;
 	btf->data_size = btf_data_size;
-	btf->nohdr_data = btf->data + btf->hdr.hdr_len;
 
 	if (copy_from_user(data, btf_data, btf_data_size)) {
 		err = -EFAULT;
 		goto errout;
 	}
 
+	err = btf_parse_hdr(env);
+	if (err)
+		goto errout;
+
+	btf->nohdr_data = btf->data + btf->hdr.hdr_len;
+
 	err = btf_parse_str_sec(env);
 	if (err)
 		goto errout;
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 7c7eeea8cffcc38124870ff1a8dc350cad393ac2..6377225b208204c1c2d8829a778f50ebaa7d816d 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -365,10 +365,13 @@ void bpf_prog_kallsyms_del_all(struct bpf_prog *fp)
 }
 
 #ifdef CONFIG_BPF_JIT
+# define BPF_JIT_LIMIT_DEFAULT	(PAGE_SIZE * 40000)
+
 /* All BPF JIT sysctl knobs here. */
 int bpf_jit_enable   __read_mostly = IS_BUILTIN(CONFIG_BPF_JIT_ALWAYS_ON);
 int bpf_jit_harden   __read_mostly;
 int bpf_jit_kallsyms __read_mostly;
+int bpf_jit_limit    __read_mostly = BPF_JIT_LIMIT_DEFAULT;
 
 static __always_inline void
 bpf_get_prog_addr_region(const struct bpf_prog *prog,
@@ -577,27 +580,64 @@ int bpf_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 	return ret;
 }
 
+static atomic_long_t bpf_jit_current;
+
+#if defined(MODULES_VADDR)
+static int __init bpf_jit_charge_init(void)
+{
+	/* Only used as heuristic here to derive limit. */
+	bpf_jit_limit = min_t(u64, round_up((MODULES_END - MODULES_VADDR) >> 2,
+					    PAGE_SIZE), INT_MAX);
+	return 0;
+}
+pure_initcall(bpf_jit_charge_init);
+#endif
+
+static int bpf_jit_charge_modmem(u32 pages)
+{
+	if (atomic_long_add_return(pages, &bpf_jit_current) >
+	    (bpf_jit_limit >> PAGE_SHIFT)) {
+		if (!capable(CAP_SYS_ADMIN)) {
+			atomic_long_sub(pages, &bpf_jit_current);
+			return -EPERM;
+		}
+	}
+
+	return 0;
+}
+
+static void bpf_jit_uncharge_modmem(u32 pages)
+{
+	atomic_long_sub(pages, &bpf_jit_current);
+}
+
 struct bpf_binary_header *
 bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
 		     unsigned int alignment,
 		     bpf_jit_fill_hole_t bpf_fill_ill_insns)
 {
 	struct bpf_binary_header *hdr;
-	unsigned int size, hole, start;
+	u32 size, hole, start, pages;
 
 	/* Most of BPF filters are really small, but if some of them
 	 * fill a page, allow at least 128 extra bytes to insert a
 	 * random section of illegal instructions.
 	 */
 	size = round_up(proglen + sizeof(*hdr) + 128, PAGE_SIZE);
+	pages = size / PAGE_SIZE;
+
+	if (bpf_jit_charge_modmem(pages))
+		return NULL;
 	hdr = module_alloc(size);
-	if (hdr == NULL)
+	if (!hdr) {
+		bpf_jit_uncharge_modmem(pages);
 		return NULL;
+	}
 
 	/* Fill space with illegal/arch-dep instructions. */
 	bpf_fill_ill_insns(hdr, size);
 
-	hdr->pages = size / PAGE_SIZE;
+	hdr->pages = pages;
 	hole = min_t(unsigned int, size - (proglen + sizeof(*hdr)),
 		     PAGE_SIZE - sizeof(*hdr));
 	start = (get_random_int() % hole) & ~(alignment - 1);
@@ -610,7 +650,10 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
 
 void bpf_jit_binary_free(struct bpf_binary_header *hdr)
 {
+	u32 pages = hdr->pages;
+
 	module_memfree(hdr);
+	bpf_jit_uncharge_modmem(pages);
 }
 
 /* This symbol is only overridden by archs that have different
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index 141710b82a6c4b117ecc819c856921f416a7aaf6..191b79948424f4b21b7aa120abc03801264bf0a6 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -512,8 +512,7 @@ static int dev_map_notification(struct notifier_block *notifier,
 				struct bpf_dtab_netdev *dev, *odev;
 
 				dev = READ_ONCE(dtab->netdev_map[i]);
-				if (!dev ||
-				    dev->dev->ifindex != netdev->ifindex)
+				if (!dev || netdev != dev->dev)
 					continue;
 				odev = cmpxchg(&dtab->netdev_map[i], dev, NULL);
 				if (dev == odev)
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index ab0d5e3f9892bc7f01ef6a5609102d25617dda85..a74972b07e7467deb018853b554027faf20c26d8 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -99,7 +99,6 @@ BPF_CALL_2(bpf_map_pop_elem, struct bpf_map *, map, void *, value)
 const struct bpf_func_proto bpf_map_pop_elem_proto = {
 	.func		= bpf_map_pop_elem,
 	.gpl_only	= false,
-	.pkt_access	= true,
 	.ret_type	= RET_INTEGER,
 	.arg1_type	= ARG_CONST_MAP_PTR,
 	.arg2_type	= ARG_PTR_TO_UNINIT_MAP_VALUE,
@@ -113,7 +112,6 @@ BPF_CALL_2(bpf_map_peek_elem, struct bpf_map *, map, void *, value)
 const struct bpf_func_proto bpf_map_peek_elem_proto = {
 	.func		= bpf_map_pop_elem,
 	.gpl_only	= false,
-	.pkt_access	= true,
 	.ret_type	= RET_INTEGER,
 	.arg1_type	= ARG_CONST_MAP_PTR,
 	.arg2_type	= ARG_PTR_TO_UNINIT_MAP_VALUE,
diff --git a/kernel/bpf/queue_stack_maps.c b/kernel/bpf/queue_stack_maps.c
index 12a93fb374492b0ff848681a0705382675fbbc40..8bbd72d3a121f4e1cb75effd9c5fe5b96728a6b5 100644
--- a/kernel/bpf/queue_stack_maps.c
+++ b/kernel/bpf/queue_stack_maps.c
@@ -122,6 +122,7 @@ static int __queue_map_get(struct bpf_map *map, void *value, bool delete)
 	raw_spin_lock_irqsave(&qs->lock, flags);
 
 	if (queue_stack_map_is_empty(qs)) {
+		memset(value, 0, qs->map.value_size);
 		err = -ENOENT;
 		goto out;
 	}
@@ -151,6 +152,7 @@ static int __stack_map_get(struct bpf_map *map, void *value, bool delete)
 	raw_spin_lock_irqsave(&qs->lock, flags);
 
 	if (queue_stack_map_is_empty(qs)) {
+		memset(value, 0, qs->map.value_size);
 		err = -ENOENT;
 		goto out;
 	}
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 98fa0be35370b4fd83eb9c924a9afb45747e6472..171a2c88e77ddd28ea5f9d5ba135d424cd09714e 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1387,21 +1387,24 @@ static bool may_access_direct_pkt_data(struct bpf_verifier_env *env,
 				       enum bpf_access_type t)
 {
 	switch (env->prog->type) {
+	/* Program types only with direct read access go here! */
 	case BPF_PROG_TYPE_LWT_IN:
 	case BPF_PROG_TYPE_LWT_OUT:
 	case BPF_PROG_TYPE_LWT_SEG6LOCAL:
 	case BPF_PROG_TYPE_SK_REUSEPORT:
-		/* dst_input() and dst_output() can't write for now */
+	case BPF_PROG_TYPE_FLOW_DISSECTOR:
+	case BPF_PROG_TYPE_CGROUP_SKB:
 		if (t == BPF_WRITE)
 			return false;
 		/* fallthrough */
+
+	/* Program types with direct read + write access go here! */
 	case BPF_PROG_TYPE_SCHED_CLS:
 	case BPF_PROG_TYPE_SCHED_ACT:
 	case BPF_PROG_TYPE_XDP:
 	case BPF_PROG_TYPE_LWT_XMIT:
 	case BPF_PROG_TYPE_SK_SKB:
 	case BPF_PROG_TYPE_SK_MSG:
-	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 		if (meta)
 			return meta->pkt_access;
 
@@ -5706,7 +5709,11 @@ static int convert_ctx_accesses(struct bpf_verifier_env *env)
 	bool is_narrower_load;
 	u32 target_size;
 
-	if (ops->gen_prologue) {
+	if (ops->gen_prologue || env->seen_direct_write) {
+		if (!ops->gen_prologue) {
+			verbose(env, "bpf verifier is misconfigured\n");
+			return -EINVAL;
+		}
 		cnt = ops->gen_prologue(insn_buf, env->seen_direct_write,
 					env->prog);
 		if (cnt >= ARRAY_SIZE(insn_buf)) {
diff --git a/net/core/filter.c b/net/core/filter.c
index 35c6933c262298d0951725ea255d70bbdd294353..e521c5ebc7d11cdfdcc10307ad973bcac2d1602a 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5264,8 +5264,6 @@ sk_msg_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_msg_pull_data_proto;
 	case BPF_FUNC_msg_push_data:
 		return &bpf_msg_push_data_proto;
-	case BPF_FUNC_get_local_storage:
-		return &bpf_get_local_storage_proto;
 	default:
 		return bpf_base_func_proto(func_id);
 	}
@@ -5296,8 +5294,6 @@ sk_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_sk_redirect_map_proto;
 	case BPF_FUNC_sk_redirect_hash:
 		return &bpf_sk_redirect_hash_proto;
-	case BPF_FUNC_get_local_storage:
-		return &bpf_get_local_storage_proto;
 #ifdef CONFIG_INET
 	case BPF_FUNC_sk_lookup_tcp:
 		return &bpf_sk_lookup_tcp_proto;
@@ -5496,7 +5492,13 @@ static bool cg_skb_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct __sk_buff, data_meta):
 	case bpf_ctx_range(struct __sk_buff, flow_keys):
 		return false;
+	case bpf_ctx_range(struct __sk_buff, data):
+	case bpf_ctx_range(struct __sk_buff, data_end):
+		if (!capable(CAP_SYS_ADMIN))
+			return false;
+		break;
 	}
+
 	if (type == BPF_WRITE) {
 		switch (off) {
 		case bpf_ctx_range(struct __sk_buff, mark):
@@ -5638,6 +5640,15 @@ static bool sock_filter_is_valid_access(int off, int size,
 					       prog->expected_attach_type);
 }
 
+static int bpf_noop_prologue(struct bpf_insn *insn_buf, bool direct_write,
+			     const struct bpf_prog *prog)
+{
+	/* Neither direct read nor direct write requires any preliminary
+	 * action.
+	 */
+	return 0;
+}
+
 static int bpf_unclone_prologue(struct bpf_insn *insn_buf, bool direct_write,
 				const struct bpf_prog *prog, int drop_verdict)
 {
@@ -7204,6 +7215,7 @@ const struct bpf_verifier_ops xdp_verifier_ops = {
 	.get_func_proto		= xdp_func_proto,
 	.is_valid_access	= xdp_is_valid_access,
 	.convert_ctx_access	= xdp_convert_ctx_access,
+	.gen_prologue		= bpf_noop_prologue,
 };
 
 const struct bpf_prog_ops xdp_prog_ops = {
@@ -7302,6 +7314,7 @@ const struct bpf_verifier_ops sk_msg_verifier_ops = {
 	.get_func_proto		= sk_msg_func_proto,
 	.is_valid_access	= sk_msg_is_valid_access,
 	.convert_ctx_access	= sk_msg_convert_ctx_access,
+	.gen_prologue		= bpf_noop_prologue,
 };
 
 const struct bpf_prog_ops sk_msg_prog_ops = {
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index b1a2c5e38530a72478cab1a874cb7f78909a118b..37b4667128a3808395e23b0c53325a5d937c6b54 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -279,7 +279,6 @@ static int proc_dointvec_minmax_bpf_enable(struct ctl_table *table, int write,
 	return ret;
 }
 
-# ifdef CONFIG_HAVE_EBPF_JIT
 static int
 proc_dointvec_minmax_bpf_restricted(struct ctl_table *table, int write,
 				    void __user *buffer, size_t *lenp,
@@ -290,7 +289,6 @@ proc_dointvec_minmax_bpf_restricted(struct ctl_table *table, int write,
 
 	return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
 }
-# endif
 #endif
 
 static struct ctl_table net_core_table[] = {
@@ -397,6 +395,14 @@ static struct ctl_table net_core_table[] = {
 		.extra2		= &one,
 	},
 # endif
+	{
+		.procname	= "bpf_jit_limit",
+		.data		= &bpf_jit_limit,
+		.maxlen		= sizeof(int),
+		.mode		= 0600,
+		.proc_handler	= proc_dointvec_minmax_bpf_restricted,
+		.extra1		= &one,
+	},
 #endif
 	{
 		.procname	= "netdev_tstamp_prequeue",
diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config
index dd49df5e2df4f64eb82559c2754f7a6a5d5bdccc..7f90d3645af892d88373926ad7eee85a77f113b1 100644
--- a/tools/testing/selftests/bpf/config
+++ b/tools/testing/selftests/bpf/config
@@ -20,3 +20,5 @@ CONFIG_VXLAN=y
 CONFIG_GENEVE=y
 CONFIG_NET_CLS_FLOWER=m
 CONFIG_LWTUNNEL=y
+CONFIG_BPF_STREAM_PARSER=y
+CONFIG_XDP_SOCKETS=y
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index 769d68a48f303960781c07a99c69be15b0691e5b..36f3d3009d1a079e57032b47b57bc306d045a3a8 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -4891,6 +4891,8 @@ static struct bpf_test tests[] = {
 			BPF_EXIT_INSN(),
 		},
 		.result = ACCEPT,
+		.result_unpriv = REJECT,
+		.errstr_unpriv = "invalid bpf_context access off=76 size=4",
 		.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
 	},
 	{
@@ -5146,6 +5148,7 @@ static struct bpf_test tests[] = {
 		.fixup_cgroup_storage = { 1 },
 		.result = REJECT,
 		.errstr = "get_local_storage() doesn't support non-zero flags",
+		.errstr_unpriv = "R2 leaks addr into helper function",
 		.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
 	},
 	{
@@ -5261,6 +5264,7 @@ static struct bpf_test tests[] = {
 		.fixup_percpu_cgroup_storage = { 1 },
 		.result = REJECT,
 		.errstr = "get_local_storage() doesn't support non-zero flags",
+		.errstr_unpriv = "R2 leaks addr into helper function",
 		.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
 	},
 	{
@@ -14050,6 +14054,13 @@ static void get_unpriv_disabled()
 	fclose(fd);
 }
 
+static bool test_as_unpriv(struct bpf_test *test)
+{
+	return !test->prog_type ||
+	       test->prog_type == BPF_PROG_TYPE_SOCKET_FILTER ||
+	       test->prog_type == BPF_PROG_TYPE_CGROUP_SKB;
+}
+
 static int do_test(bool unpriv, unsigned int from, unsigned int to)
 {
 	int i, passes = 0, errors = 0, skips = 0;
@@ -14060,10 +14071,10 @@ static int do_test(bool unpriv, unsigned int from, unsigned int to)
 		/* Program types that are not supported by non-root we
 		 * skip right away.
 		 */
-		if (!test->prog_type && unpriv_disabled) {
+		if (test_as_unpriv(test) && unpriv_disabled) {
 			printf("#%d/u %s SKIP\n", i, test->descr);
 			skips++;
-		} else if (!test->prog_type) {
+		} else if (test_as_unpriv(test)) {
 			if (!unpriv)
 				set_admin(false);
 			printf("#%d/u %s ", i, test->descr);