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-rw-r--r--kernel/bpf/bpf_iter.c20
-rw-r--r--kernel/bpf/btf.c183
-rw-r--r--kernel/bpf/cgroup.c30
-rw-r--r--kernel/bpf/core.c289
-rw-r--r--kernel/bpf/helpers.c34
-rw-r--r--kernel/bpf/preload/Makefile28
-rw-r--r--kernel/bpf/preload/iterators/Makefile6
-rw-r--r--kernel/bpf/preload/iterators/iterators.c28
-rw-r--r--kernel/bpf/preload/iterators/iterators.lskel.h428
-rw-r--r--kernel/bpf/preload/iterators/iterators.skel.h412
-rw-r--r--kernel/bpf/trampoline.c6
-rw-r--r--kernel/bpf/verifier.c36
-rw-r--r--kernel/trace/bpf_trace.c2
13 files changed, 958 insertions, 544 deletions
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c
index b7aef5b3416d..110029ede71e 100644
--- a/kernel/bpf/bpf_iter.c
+++ b/kernel/bpf/bpf_iter.c
@@ -5,6 +5,7 @@
#include <linux/anon_inodes.h>
#include <linux/filter.h>
#include <linux/bpf.h>
+#include <linux/rcupdate_trace.h>
struct bpf_iter_target_info {
struct list_head list;
@@ -684,11 +685,20 @@ int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx)
{
int ret;
- rcu_read_lock();
- migrate_disable();
- ret = bpf_prog_run(prog, ctx);
- migrate_enable();
- rcu_read_unlock();
+ if (prog->aux->sleepable) {
+ rcu_read_lock_trace();
+ migrate_disable();
+ might_fault();
+ ret = bpf_prog_run(prog, ctx);
+ migrate_enable();
+ rcu_read_unlock_trace();
+ } else {
+ rcu_read_lock();
+ migrate_disable();
+ ret = bpf_prog_run(prog, ctx);
+ migrate_enable();
+ rcu_read_unlock();
+ }
/* bpf program can only return 0 or 1:
* 0 : okay
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index a1c44c17ea9c..11740b300de9 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -419,6 +419,9 @@ static struct btf_type btf_void;
static int btf_resolve(struct btf_verifier_env *env,
const struct btf_type *t, u32 type_id);
+static int btf_func_check(struct btf_verifier_env *env,
+ const struct btf_type *t);
+
static bool btf_type_is_modifier(const struct btf_type *t)
{
/* Some of them is not strictly a C modifier
@@ -595,6 +598,7 @@ static bool btf_type_needs_resolve(const struct btf_type *t)
btf_type_is_struct(t) ||
btf_type_is_array(t) ||
btf_type_is_var(t) ||
+ btf_type_is_func(t) ||
btf_type_is_decl_tag(t) ||
btf_type_is_datasec(t);
}
@@ -3571,9 +3575,24 @@ static s32 btf_func_check_meta(struct btf_verifier_env *env,
return 0;
}
+static int btf_func_resolve(struct btf_verifier_env *env,
+ const struct resolve_vertex *v)
+{
+ const struct btf_type *t = v->t;
+ u32 next_type_id = t->type;
+ int err;
+
+ err = btf_func_check(env, t);
+ if (err)
+ return err;
+
+ env_stack_pop_resolved(env, next_type_id, 0);
+ return 0;
+}
+
static struct btf_kind_operations func_ops = {
.check_meta = btf_func_check_meta,
- .resolve = btf_df_resolve,
+ .resolve = btf_func_resolve,
.check_member = btf_df_check_member,
.check_kflag_member = btf_df_check_kflag_member,
.log_details = btf_ref_type_log,
@@ -4194,7 +4213,7 @@ static bool btf_resolve_valid(struct btf_verifier_env *env,
return !btf_resolved_type_id(btf, type_id) &&
!btf_resolved_type_size(btf, type_id);
- if (btf_type_is_decl_tag(t))
+ if (btf_type_is_decl_tag(t) || btf_type_is_func(t))
return btf_resolved_type_id(btf, type_id) &&
!btf_resolved_type_size(btf, type_id);
@@ -4284,12 +4303,6 @@ static int btf_check_all_types(struct btf_verifier_env *env)
if (err)
return err;
}
-
- if (btf_type_is_func(t)) {
- err = btf_func_check(env, t);
- if (err)
- return err;
- }
}
return 0;
@@ -4886,6 +4899,7 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type,
const char *tname = prog->aux->attach_func_name;
struct bpf_verifier_log *log = info->log;
const struct btf_param *args;
+ const char *tag_value;
u32 nr_args, arg;
int i, ret;
@@ -5038,6 +5052,13 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type,
info->btf = btf;
info->btf_id = t->type;
t = btf_type_by_id(btf, t->type);
+
+ if (btf_type_is_type_tag(t)) {
+ tag_value = __btf_name_by_offset(btf, t->name_off);
+ if (strcmp(tag_value, "user") == 0)
+ info->reg_type |= MEM_USER;
+ }
+
/* skip modifiers */
while (btf_type_is_modifier(t)) {
info->btf_id = t->type;
@@ -5064,12 +5085,12 @@ enum bpf_struct_walk_result {
static int btf_struct_walk(struct bpf_verifier_log *log, const struct btf *btf,
const struct btf_type *t, int off, int size,
- u32 *next_btf_id)
+ u32 *next_btf_id, enum bpf_type_flag *flag)
{
u32 i, moff, mtrue_end, msize = 0, total_nelems = 0;
const struct btf_type *mtype, *elem_type = NULL;
const struct btf_member *member;
- const char *tname, *mname;
+ const char *tname, *mname, *tag_value;
u32 vlen, elem_id, mid;
again:
@@ -5253,7 +5274,8 @@ error:
}
if (btf_type_is_ptr(mtype)) {
- const struct btf_type *stype;
+ const struct btf_type *stype, *t;
+ enum bpf_type_flag tmp_flag = 0;
u32 id;
if (msize != size || off != moff) {
@@ -5262,9 +5284,19 @@ error:
mname, moff, tname, off, size);
return -EACCES;
}
+
+ /* check __user tag */
+ t = btf_type_by_id(btf, mtype->type);
+ if (btf_type_is_type_tag(t)) {
+ tag_value = __btf_name_by_offset(btf, t->name_off);
+ if (strcmp(tag_value, "user") == 0)
+ tmp_flag = MEM_USER;
+ }
+
stype = btf_type_skip_modifiers(btf, mtype->type, &id);
if (btf_type_is_struct(stype)) {
*next_btf_id = id;
+ *flag = tmp_flag;
return WALK_PTR;
}
}
@@ -5291,13 +5323,14 @@ error:
int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
const struct btf_type *t, int off, int size,
enum bpf_access_type atype __maybe_unused,
- u32 *next_btf_id)
+ u32 *next_btf_id, enum bpf_type_flag *flag)
{
+ enum bpf_type_flag tmp_flag = 0;
int err;
u32 id;
do {
- err = btf_struct_walk(log, btf, t, off, size, &id);
+ err = btf_struct_walk(log, btf, t, off, size, &id, &tmp_flag);
switch (err) {
case WALK_PTR:
@@ -5305,6 +5338,7 @@ int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
* we're done.
*/
*next_btf_id = id;
+ *flag = tmp_flag;
return PTR_TO_BTF_ID;
case WALK_SCALAR:
return SCALAR_VALUE;
@@ -5349,6 +5383,7 @@ bool btf_struct_ids_match(struct bpf_verifier_log *log,
const struct btf *need_btf, u32 need_type_id)
{
const struct btf_type *type;
+ enum bpf_type_flag flag;
int err;
/* Are we already done? */
@@ -5359,7 +5394,7 @@ again:
type = btf_type_by_id(btf, id);
if (!type)
return false;
- err = btf_struct_walk(log, btf, type, off, 1, &id);
+ err = btf_struct_walk(log, btf, type, off, 1, &id, &flag);
if (err != WALK_STRUCT)
return false;
@@ -6740,8 +6775,19 @@ int register_btf_kfunc_id_set(enum bpf_prog_type prog_type,
int ret;
btf = btf_get_module_btf(kset->owner);
- if (IS_ERR_OR_NULL(btf))
- return btf ? PTR_ERR(btf) : -ENOENT;
+ if (!btf) {
+ if (!kset->owner && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) {
+ pr_err("missing vmlinux BTF, cannot register kfuncs\n");
+ return -ENOENT;
+ }
+ if (kset->owner && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) {
+ pr_err("missing module BTF, cannot register kfuncs\n");
+ return -ENOENT;
+ }
+ return 0;
+ }
+ if (IS_ERR(btf))
+ return PTR_ERR(btf);
hook = bpf_prog_type_to_kfunc_hook(prog_type);
ret = btf_populate_kfunc_set(btf, hook, kset);
@@ -6752,10 +6798,113 @@ int register_btf_kfunc_id_set(enum bpf_prog_type prog_type,
}
EXPORT_SYMBOL_GPL(register_btf_kfunc_id_set);
+#define MAX_TYPES_ARE_COMPAT_DEPTH 2
+
+static
+int __bpf_core_types_are_compat(const struct btf *local_btf, __u32 local_id,
+ const struct btf *targ_btf, __u32 targ_id,
+ int level)
+{
+ const struct btf_type *local_type, *targ_type;
+ int depth = 32; /* max recursion depth */
+
+ /* caller made sure that names match (ignoring flavor suffix) */
+ local_type = btf_type_by_id(local_btf, local_id);
+ targ_type = btf_type_by_id(targ_btf, targ_id);
+ if (btf_kind(local_type) != btf_kind(targ_type))
+ return 0;
+
+recur:
+ depth--;
+ if (depth < 0)
+ return -EINVAL;
+
+ local_type = btf_type_skip_modifiers(local_btf, local_id, &local_id);
+ targ_type = btf_type_skip_modifiers(targ_btf, targ_id, &targ_id);
+ if (!local_type || !targ_type)
+ return -EINVAL;
+
+ if (btf_kind(local_type) != btf_kind(targ_type))
+ return 0;
+
+ switch (btf_kind(local_type)) {
+ case BTF_KIND_UNKN:
+ case BTF_KIND_STRUCT:
+ case BTF_KIND_UNION:
+ case BTF_KIND_ENUM:
+ case BTF_KIND_FWD:
+ return 1;
+ case BTF_KIND_INT:
+ /* just reject deprecated bitfield-like integers; all other
+ * integers are by default compatible between each other
+ */
+ return btf_int_offset(local_type) == 0 && btf_int_offset(targ_type) == 0;
+ case BTF_KIND_PTR:
+ local_id = local_type->type;
+ targ_id = targ_type->type;
+ goto recur;
+ case BTF_KIND_ARRAY:
+ local_id = btf_array(local_type)->type;
+ targ_id = btf_array(targ_type)->type;
+ goto recur;
+ case BTF_KIND_FUNC_PROTO: {
+ struct btf_param *local_p = btf_params(local_type);
+ struct btf_param *targ_p = btf_params(targ_type);
+ __u16 local_vlen = btf_vlen(local_type);
+ __u16 targ_vlen = btf_vlen(targ_type);
+ int i, err;
+
+ if (local_vlen != targ_vlen)
+ return 0;
+
+ for (i = 0; i < local_vlen; i++, local_p++, targ_p++) {
+ if (level <= 0)
+ return -EINVAL;
+
+ btf_type_skip_modifiers(local_btf, local_p->type, &local_id);
+ btf_type_skip_modifiers(targ_btf, targ_p->type, &targ_id);
+ err = __bpf_core_types_are_compat(local_btf, local_id,
+ targ_btf, targ_id,
+ level - 1);
+ if (err <= 0)
+ return err;
+ }
+
+ /* tail recurse for return type check */
+ btf_type_skip_modifiers(local_btf, local_type->type, &local_id);
+ btf_type_skip_modifiers(targ_btf, targ_type->type, &targ_id);
+ goto recur;
+ }
+ default:
+ return 0;
+ }
+}
+
+/* Check local and target types for compatibility. This check is used for
+ * type-based CO-RE relocations and follow slightly different rules than
+ * field-based relocations. This function assumes that root types were already
+ * checked for name match. Beyond that initial root-level name check, names
+ * are completely ignored. Compatibility rules are as follows:
+ * - any two STRUCTs/UNIONs/FWDs/ENUMs/INTs are considered compatible, but
+ * kind should match for local and target types (i.e., STRUCT is not
+ * compatible with UNION);
+ * - for ENUMs, the size is ignored;
+ * - for INT, size and signedness are ignored;
+ * - for ARRAY, dimensionality is ignored, element types are checked for
+ * compatibility recursively;
+ * - CONST/VOLATILE/RESTRICT modifiers are ignored;
+ * - TYPEDEFs/PTRs are compatible if types they pointing to are compatible;
+ * - FUNC_PROTOs are compatible if they have compatible signature: same
+ * number of input args and compatible return and argument types.
+ * These rules are not set in stone and probably will be adjusted as we get
+ * more experience with using BPF CO-RE relocations.
+ */
int bpf_core_types_are_compat(const struct btf *local_btf, __u32 local_id,
const struct btf *targ_btf, __u32 targ_id)
{
- return -EOPNOTSUPP;
+ return __bpf_core_types_are_compat(local_btf, local_id,
+ targ_btf, targ_id,
+ MAX_TYPES_ARE_COMPAT_DEPTH);
}
static bool bpf_core_is_flavor_sep(const char *s)
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 279ebbed75a5..098632fdbc45 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1384,20 +1384,6 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
}
#ifdef CONFIG_NET
-static bool __cgroup_bpf_prog_array_is_empty(struct cgroup *cgrp,
- enum cgroup_bpf_attach_type attach_type)
-{
- struct bpf_prog_array *prog_array;
- bool empty;
-
- rcu_read_lock();
- prog_array = rcu_dereference(cgrp->bpf.effective[attach_type]);
- empty = bpf_prog_array_is_empty(prog_array);
- rcu_read_unlock();
-
- return empty;
-}
-
static int sockopt_alloc_buf(struct bpf_sockopt_kern *ctx, int max_optlen,
struct bpf_sockopt_buf *buf)
{
@@ -1456,19 +1442,11 @@ int __cgroup_bpf_run_filter_setsockopt(struct sock *sk, int *level,
};
int ret, max_optlen;
- /* Opportunistic check to see whether we have any BPF program
- * attached to the hook so we don't waste time allocating
- * memory and locking the socket.
- */
- if (__cgroup_bpf_prog_array_is_empty(cgrp, CGROUP_SETSOCKOPT))
- return 0;
-
/* Allocate a bit more than the initial user buffer for
* BPF program. The canonical use case is overriding
* TCP_CONGESTION(nv) to TCP_CONGESTION(cubic).
*/
max_optlen = max_t(int, 16, *optlen);
-
max_optlen = sockopt_alloc_buf(&ctx, max_optlen, &buf);
if (max_optlen < 0)
return max_optlen;
@@ -1550,15 +1528,7 @@ int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
};
int ret;
- /* Opportunistic check to see whether we have any BPF program
- * attached to the hook so we don't waste time allocating
- * memory and locking the socket.
- */
- if (__cgroup_bpf_prog_array_is_empty(cgrp, CGROUP_GETSOCKOPT))
- return retval;
-
ctx.optlen = max_optlen;
-
max_optlen = sockopt_alloc_buf(&ctx, max_optlen, &buf);
if (max_optlen < 0)
return max_optlen;
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 0a1cfd8544b9..42d96549a804 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -537,13 +537,10 @@ long bpf_jit_limit_max __read_mostly;
static void
bpf_prog_ksym_set_addr(struct bpf_prog *prog)
{
- const struct bpf_binary_header *hdr = bpf_jit_binary_hdr(prog);
- unsigned long addr = (unsigned long)hdr;
-
WARN_ON_ONCE(!bpf_prog_ebpf_jited(prog));
prog->aux->ksym.start = (unsigned long) prog->bpf_func;
- prog->aux->ksym.end = addr + hdr->pages * PAGE_SIZE;
+ prog->aux->ksym.end = prog->aux->ksym.start + prog->jited_len;
}
static void
@@ -808,6 +805,137 @@ int bpf_jit_add_poke_descriptor(struct bpf_prog *prog,
return slot;
}
+/*
+ * BPF program pack allocator.
+ *
+ * Most BPF programs are pretty small. Allocating a hole page for each
+ * program is sometime a waste. Many small bpf program also adds pressure
+ * to instruction TLB. To solve this issue, we introduce a BPF program pack
+ * allocator. The prog_pack allocator uses HPAGE_PMD_SIZE page (2MB on x86)
+ * to host BPF programs.
+ */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define BPF_PROG_PACK_SIZE HPAGE_PMD_SIZE
+#else
+#define BPF_PROG_PACK_SIZE PAGE_SIZE
+#endif
+#define BPF_PROG_CHUNK_SHIFT 6
+#define BPF_PROG_CHUNK_SIZE (1 << BPF_PROG_CHUNK_SHIFT)
+#define BPF_PROG_CHUNK_MASK (~(BPF_PROG_CHUNK_SIZE - 1))
+#define BPF_PROG_CHUNK_COUNT (BPF_PROG_PACK_SIZE / BPF_PROG_CHUNK_SIZE)
+
+struct bpf_prog_pack {
+ struct list_head list;
+ void *ptr;
+ unsigned long bitmap[BITS_TO_LONGS(BPF_PROG_CHUNK_COUNT)];
+};
+
+#define BPF_PROG_MAX_PACK_PROG_SIZE BPF_PROG_PACK_SIZE
+#define BPF_PROG_SIZE_TO_NBITS(size) (round_up(size, BPF_PROG_CHUNK_SIZE) / BPF_PROG_CHUNK_SIZE)
+
+static DEFINE_MUTEX(pack_mutex);
+static LIST_HEAD(pack_list);
+
+static struct bpf_prog_pack *alloc_new_pack(void)
+{
+ struct bpf_prog_pack *pack;
+
+ pack = kzalloc(sizeof(*pack), GFP_KERNEL);
+ if (!pack)
+ return NULL;
+ pack->ptr = module_alloc(BPF_PROG_PACK_SIZE);
+ if (!pack->ptr) {
+ kfree(pack);
+ return NULL;
+ }
+ bitmap_zero(pack->bitmap, BPF_PROG_PACK_SIZE / BPF_PROG_CHUNK_SIZE);
+ list_add_tail(&pack->list, &pack_list);
+
+ set_vm_flush_reset_perms(pack->ptr);
+ set_memory_ro((unsigned long)pack->ptr, BPF_PROG_PACK_SIZE / PAGE_SIZE);
+ set_memory_x((unsigned long)pack->ptr, BPF_PROG_PACK_SIZE / PAGE_SIZE);
+ return pack;
+}
+
+static void *bpf_prog_pack_alloc(u32 size)
+{
+ unsigned int nbits = BPF_PROG_SIZE_TO_NBITS(size);
+ struct bpf_prog_pack *pack;
+ unsigned long pos;
+ void *ptr = NULL;
+
+ if (size > BPF_PROG_MAX_PACK_PROG_SIZE) {
+ size = round_up(size, PAGE_SIZE);
+ ptr = module_alloc(size);
+ if (ptr) {
+ set_vm_flush_reset_perms(ptr);
+ set_memory_ro((unsigned long)ptr, size / PAGE_SIZE);
+ set_memory_x((unsigned long)ptr, size / PAGE_SIZE);
+ }
+ return ptr;
+ }
+ mutex_lock(&pack_mutex);
+ list_for_each_entry(pack, &pack_list, list) {
+ pos = bitmap_find_next_zero_area(pack->bitmap, BPF_PROG_CHUNK_COUNT, 0,
+ nbits, 0);
+ if (pos < BPF_PROG_CHUNK_COUNT)
+ goto found_free_area;
+ }
+
+ pack = alloc_new_pack();
+ if (!pack)
+ goto out;
+
+ pos = 0;
+
+found_free_area:
+ bitmap_set(pack->bitmap, pos, nbits);
+ ptr = (void *)(pack->ptr) + (pos << BPF_PROG_CHUNK_SHIFT);
+
+out:
+ mutex_unlock(&pack_mutex);
+ return ptr;
+}
+
+static void bpf_prog_pack_free(struct bpf_binary_header *hdr)
+{
+ struct bpf_prog_pack *pack = NULL, *tmp;
+ unsigned int nbits;
+ unsigned long pos;
+ void *pack_ptr;
+
+ if (hdr->size > BPF_PROG_MAX_PACK_PROG_SIZE) {
+ module_memfree(hdr);
+ return;
+ }
+
+ pack_ptr = (void *)((unsigned long)hdr & ~(BPF_PROG_PACK_SIZE - 1));
+ mutex_lock(&pack_mutex);
+
+ list_for_each_entry(tmp, &pack_list, list) {
+ if (tmp->ptr == pack_ptr) {
+ pack = tmp;
+ break;
+ }
+ }
+
+ if (WARN_ONCE(!pack, "bpf_prog_pack bug\n"))
+ goto out;
+
+ nbits = BPF_PROG_SIZE_TO_NBITS(hdr->size);
+ pos = ((unsigned long)hdr - (unsigned long)pack_ptr) >> BPF_PROG_CHUNK_SHIFT;
+
+ bitmap_clear(pack->bitmap, pos, nbits);
+ if (bitmap_find_next_zero_area(pack->bitmap, BPF_PROG_CHUNK_COUNT, 0,
+ BPF_PROG_CHUNK_COUNT, 0) == 0) {
+ list_del(&pack->list);
+ module_memfree(pack->ptr);
+ kfree(pack);
+ }
+out:
+ mutex_unlock(&pack_mutex);
+}
+
static atomic_long_t bpf_jit_current;
/* Can be overridden by an arch's JIT compiler if it has a custom,
@@ -833,12 +961,11 @@ static int __init bpf_jit_charge_init(void)
}
pure_initcall(bpf_jit_charge_init);
-int bpf_jit_charge_modmem(u32 pages)
+int bpf_jit_charge_modmem(u32 size)
{
- if (atomic_long_add_return(pages, &bpf_jit_current) >
- (bpf_jit_limit >> PAGE_SHIFT)) {
+ if (atomic_long_add_return(size, &bpf_jit_current) > bpf_jit_limit) {
if (!bpf_capable()) {
- atomic_long_sub(pages, &bpf_jit_current);
+ atomic_long_sub(size, &bpf_jit_current);
return -EPERM;
}
}
@@ -846,9 +973,9 @@ int bpf_jit_charge_modmem(u32 pages)
return 0;
}
-void bpf_jit_uncharge_modmem(u32 pages)
+void bpf_jit_uncharge_modmem(u32 size)
{
- atomic_long_sub(pages, &bpf_jit_current);
+ atomic_long_sub(size, &bpf_jit_current);
}
void *__weak bpf_jit_alloc_exec(unsigned long size)
@@ -867,7 +994,7 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
bpf_jit_fill_hole_t bpf_fill_ill_insns)
{
struct bpf_binary_header *hdr;
- u32 size, hole, start, pages;
+ u32 size, hole, start;
WARN_ON_ONCE(!is_power_of_2(alignment) ||
alignment > BPF_IMAGE_ALIGNMENT);
@@ -877,20 +1004,19 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
* random section of illegal instructions.
*/
size = round_up(proglen + sizeof(*hdr) + 128, PAGE_SIZE);
- pages = size / PAGE_SIZE;
- if (bpf_jit_charge_modmem(pages))
+ if (bpf_jit_charge_modmem(size))
return NULL;
hdr = bpf_jit_alloc_exec(size);
if (!hdr) {
- bpf_jit_uncharge_modmem(pages);
+ bpf_jit_uncharge_modmem(size);
return NULL;
}
/* Fill space with illegal/arch-dep instructions. */
bpf_fill_ill_insns(hdr, size);
- hdr->pages = pages;
+ hdr->size = size;
hole = min_t(unsigned int, size - (proglen + sizeof(*hdr)),
PAGE_SIZE - sizeof(*hdr));
start = (get_random_int() % hole) & ~(alignment - 1);
@@ -903,10 +1029,113 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
void bpf_jit_binary_free(struct bpf_binary_header *hdr)
{
- u32 pages = hdr->pages;
+ u32 size = hdr->size;
bpf_jit_free_exec(hdr);
- bpf_jit_uncharge_modmem(pages);
+ bpf_jit_uncharge_modmem(size);
+}
+
+/* Allocate jit binary from bpf_prog_pack allocator.
+ * Since the allocated memory is RO+X, the JIT engine cannot write directly
+ * to the memory. To solve this problem, a RW buffer is also allocated at
+ * as the same time. The JIT engine should calculate offsets based on the
+ * RO memory address, but write JITed program to the RW buffer. Once the
+ * JIT engine finishes, it calls bpf_jit_binary_pack_finalize, which copies
+ * the JITed program to the RO memory.
+ */
+struct bpf_binary_header *
+bpf_jit_binary_pack_alloc(unsigned int proglen, u8 **image_ptr,
+ unsigned int alignment,
+ struct bpf_binary_header **rw_header,
+ u8 **rw_image,
+ bpf_jit_fill_hole_t bpf_fill_ill_insns)
+{
+ struct bpf_binary_header *ro_header;
+ u32 size, hole, start;
+
+ WARN_ON_ONCE(!is_power_of_2(alignment) ||
+ alignment > BPF_IMAGE_ALIGNMENT);
+
+ /* add 16 bytes for a random section of illegal instructions */
+ size = round_up(proglen + sizeof(*ro_header) + 16, BPF_PROG_CHUNK_SIZE);
+
+ if (bpf_jit_charge_modmem(size))
+ return NULL;
+ ro_header = bpf_prog_pack_alloc(size);
+ if (!ro_header) {
+ bpf_jit_uncharge_modmem(size);
+ return NULL;
+ }
+
+ *rw_header = kvmalloc(size, GFP_KERNEL);
+ if (!*rw_header) {
+ bpf_prog_pack_free(ro_header);
+ bpf_jit_uncharge_modmem(size);
+ return NULL;
+ }
+
+ /* Fill space with illegal/arch-dep instructions. */
+ bpf_fill_ill_insns(*rw_header, size);
+ (*rw_header)->size = size;
+
+ hole = min_t(unsigned int, size - (proglen + sizeof(*ro_header)),
+ BPF_PROG_CHUNK_SIZE - sizeof(*ro_header));
+ start = (get_random_int() % hole) & ~(alignment - 1);
+
+ *image_ptr = &ro_header->image[start];
+ *rw_image = &(*rw_header)->image[start];
+
+ return ro_header;
+}
+
+/* Copy JITed text from rw_header to its final location, the ro_header. */
+int bpf_jit_binary_pack_finalize(struct bpf_prog *prog,
+ struct bpf_binary_header *ro_header,
+ struct bpf_binary_header *rw_header)
+{
+ void *ptr;
+
+ ptr = bpf_arch_text_copy(ro_header, rw_header, rw_header->size);
+
+ kvfree(rw_header);
+
+ if (IS_ERR(ptr)) {
+ bpf_prog_pack_free(ro_header);
+ return PTR_ERR(ptr);
+ }
+ prog->aux->use_bpf_prog_pack = true;
+ return 0;
+}
+
+/* bpf_jit_binary_pack_free is called in two different scenarios:
+ * 1) when the program is freed after;
+ * 2) when the JIT engine fails (before bpf_jit_binary_pack_finalize).
+ * For case 2), we need to free both the RO memory and the RW buffer.
+ * Also, ro_header->size in 2) is not properly set yet, so rw_header->size
+ * is used for uncharge.
+ */
+void bpf_jit_binary_pack_free(struct bpf_binary_header *ro_header,
+ struct bpf_binary_header *rw_header)
+{
+ u32 size = rw_header ? rw_header->size : ro_header->size;
+
+ bpf_prog_pack_free(ro_header);
+ kvfree(rw_header);
+ bpf_jit_uncharge_modmem(size);
+}
+
+static inline struct bpf_binary_header *
+bpf_jit_binary_hdr(const struct bpf_prog *fp)
+{
+ unsigned long real_start = (unsigned long)fp->bpf_func;
+ unsigned long addr;
+
+ if (fp->aux->use_bpf_prog_pack)
+ addr = real_start & BPF_PROG_CHUNK_MASK;
+ else
+ addr = real_start & PAGE_MASK;
+
+ return (void *)addr;
}
/* This symbol is only overridden by archs that have different
@@ -918,7 +1147,10 @@ void __weak bpf_jit_free(struct bpf_prog *fp)
if (fp->jited) {
struct bpf_binary_header *hdr = bpf_jit_binary_hdr(fp);
- bpf_jit_binary_free(hdr);
+ if (fp->aux->use_bpf_prog_pack)
+ bpf_jit_binary_pack_free(hdr, NULL /* rw_buffer */);
+ else
+ bpf_jit_binary_free(hdr);
WARN_ON_ONCE(!bpf_prog_kallsyms_verify_off(fp));
}
@@ -1968,18 +2200,10 @@ static struct bpf_prog_dummy {
},
};
-/* to avoid allocating empty bpf_prog_array for cgroups that
- * don't have bpf program attached use one global 'empty_prog_array'
- * It will not be modified the caller of bpf_prog_array_alloc()
- * (since caller requested prog_cnt == 0)
- * that pointer should be 'freed' by bpf_prog_array_free()
- */
-static struct {
- struct bpf_prog_array hdr;
- struct bpf_prog *null_prog;
-} empty_prog_array = {
+struct bpf_empty_prog_array bpf_empty_prog_array = {
.null_prog = NULL,
};
+EXPORT_SYMBOL(bpf_empty_prog_array);
struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags)
{
@@ -1989,12 +2213,12 @@ struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags)
(prog_cnt + 1),
flags);
- return &empty_prog_array.hdr;
+ return &bpf_empty_prog_array.hdr;
}
void bpf_prog_array_free(struct bpf_prog_array *progs)
{
- if (!progs || progs == &empty_prog_array.hdr)
+ if (!progs || progs == &bpf_empty_prog_array.hdr)
return;
kfree_rcu(progs, rcu);
}
@@ -2453,6 +2677,11 @@ int __weak bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
return -ENOTSUPP;
}
+void * __weak bpf_arch_text_copy(void *dst, void *src, size_t len)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
DEFINE_STATIC_KEY_FALSE(bpf_stats_enabled_key);
EXPORT_SYMBOL(bpf_stats_enabled_key);
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 01cfdf40c838..4e5969fde0b3 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -16,6 +16,7 @@
#include <linux/pid_namespace.h>
#include <linux/proc_ns.h>
#include <linux/security.h>
+#include <linux/btf_ids.h>
#include "../../lib/kstrtox.h"
@@ -671,6 +672,39 @@ const struct bpf_func_proto bpf_copy_from_user_proto = {
.arg3_type = ARG_ANYTHING,
};
+BPF_CALL_5(bpf_copy_from_user_task, void *, dst, u32, size,
+ const void __user *, user_ptr, struct task_struct *, tsk, u64, flags)
+{
+ int ret;
+
+ /* flags is not used yet */
+ if (unlikely(flags))
+ return -EINVAL;
+
+ if (unlikely(!size))
+ return 0;
+
+ ret = access_process_vm(tsk, (unsigned long)user_ptr, dst, size, 0);
+ if (ret == size)
+ return 0;
+
+ memset(dst, 0, size);
+ /* Return -EFAULT for partial read */
+ return ret < 0 ? ret : -EFAULT;
+}
+
+const struct bpf_func_proto bpf_copy_from_user_task_proto = {
+ .func = bpf_copy_from_user_task,
+ .gpl_only = true,
+ .ret_type = RET_INTEGER,
+ .arg1_type = ARG_PTR_TO_UNINIT_MEM,
+ .arg2_type = ARG_CONST_SIZE_OR_ZERO,
+ .arg3_type = ARG_ANYTHING,
+ .arg4_type = ARG_PTR_TO_BTF_ID,
+ .arg4_btf_id = &btf_tracing_ids[BTF_TRACING_TYPE_TASK],
+ .arg5_type = ARG_ANYTHING
+};
+
BPF_CALL_2(bpf_per_cpu_ptr, const void *, ptr, u32, cpu)
{
if (cpu >= nr_cpu_ids)
diff --git a/kernel/bpf/preload/Makefile b/kernel/bpf/preload/Makefile
index 1400ac58178e..baf47d9c7557 100644
--- a/kernel/bpf/preload/Makefile
+++ b/kernel/bpf/preload/Makefile
@@ -1,40 +1,16 @@
# SPDX-License-Identifier: GPL-2.0
LIBBPF_SRCS = $(srctree)/tools/lib/bpf/
-LIBBPF_OUT = $(abspath $(obj))/libbpf
-LIBBPF_A = $(LIBBPF_OUT)/libbpf.a
-LIBBPF_DESTDIR = $(LIBBPF_OUT)
-LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
-
-# Although not in use by libbpf's Makefile, set $(O) so that the "dummy" test
-# in tools/scripts/Makefile.include always succeeds when building the kernel
-# with $(O) pointing to a relative path, as in "make O=build bindeb-pkg".
-$(LIBBPF_A): | $(LIBBPF_OUT)
- $(Q)$(MAKE) -C $(LIBBPF_SRCS) O=$(LIBBPF_OUT)/ OUTPUT=$(LIBBPF_OUT)/ \
- DESTDIR=$(LIBBPF_DESTDIR) prefix= \
- $(LIBBPF_OUT)/libbpf.a install_headers
-
-libbpf_hdrs: $(LIBBPF_A)
-
-.PHONY: libbpf_hdrs
-
-$(LIBBPF_OUT):
- $(call msg,MKDIR,$@)
- $(Q)mkdir -p $@
+LIBBPF_INCLUDE = $(LIBBPF_SRCS)/..
userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
-I $(LIBBPF_INCLUDE) -Wno-unused-result
userprogs := bpf_preload_umd
-clean-files := libbpf/
-
-$(obj)/iterators/iterators.o: | libbpf_hdrs
-
bpf_preload_umd-objs := iterators/iterators.o
-bpf_preload_umd-userldlibs := $(LIBBPF_A) -lelf -lz
-$(obj)/bpf_preload_umd: $(LIBBPF_A)
+$(obj)/bpf_preload_umd:
$(obj)/bpf_preload_umd_blob.o: $(obj)/bpf_preload_umd
diff --git a/kernel/bpf/preload/iterators/Makefile b/kernel/bpf/preload/iterators/Makefile
index b8bd60511227..bfe24f8c5a20 100644
--- a/kernel/bpf/preload/iterators/Makefile
+++ b/kernel/bpf/preload/iterators/Makefile
@@ -35,15 +35,15 @@ endif
.PHONY: all clean
-all: iterators.skel.h
+all: iterators.lskel.h
clean:
$(call msg,CLEAN)
$(Q)rm -rf $(OUTPUT) iterators
-iterators.skel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
+iterators.lskel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
$(call msg,GEN-SKEL,$@)
- $(Q)$(BPFTOOL) gen skeleton $< > $@
+ $(Q)$(BPFTOOL) gen skeleton -L $< > $@
$(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c
index 5d872a705470..4dafe0f4f2b2 100644
--- a/kernel/bpf/preload/iterators/iterators.c
+++ b/kernel/bpf/preload/iterators/iterators.c
@@ -10,20 +10,36 @@
#include <bpf/libbpf.h>
#include <bpf/bpf.h>
#include <sys/mount.h>
-#include "iterators.skel.h"
+#include "iterators.lskel.h"
#include "bpf_preload_common.h"
int to_kernel = -1;
int from_kernel = 0;
-static int send_link_to_kernel(struct bpf_link *link, const char *link_name)
+static int __bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
+{
+ union bpf_attr attr;
+ int err;
+
+ memset(&attr, 0, sizeof(attr));
+ attr.info.bpf_fd = bpf_fd;
+ attr.info.info_len = *info_len;
+ attr.info.info = (long) info;
+
+ err = skel_sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
+ if (!err)
+ *info_len = attr.info.info_len;
+ return err;
+}
+
+static int send_link_to_kernel(int link_fd, const char *link_name)
{
struct bpf_preload_info obj = {};
struct bpf_link_info info = {};
__u32 info_len = sizeof(info);
int err;
- err = bpf_obj_get_info_by_fd(bpf_link__fd(link), &info, &info_len);
+ err = __bpf_obj_get_info_by_fd(link_fd, &info, &info_len);
if (err)
return err;
obj.link_id = info.id;
@@ -37,7 +53,6 @@ static int send_link_to_kernel(struct bpf_link *link, const char *link_name)
int main(int argc, char **argv)
{
- struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
struct iterators_bpf *skel;
int err, magic;
int debug_fd;
@@ -55,7 +70,6 @@ int main(int argc, char **argv)
printf("bad start magic %d\n", magic);
return 1;
}
- setrlimit(RLIMIT_MEMLOCK, &rlim);
/* libbpf opens BPF object and loads it into the kernel */
skel = iterators_bpf__open_and_load();
if (!skel) {
@@ -72,10 +86,10 @@ int main(int argc, char **argv)
goto cleanup;
/* send two bpf_link IDs with names to the kernel */
- err = send_link_to_kernel(skel->links.dump_bpf_map, "maps.debug");
+ err = send_link_to_kernel(skel->links.dump_bpf_map_fd, "maps.debug");
if (err)
goto cleanup;
- err = send_link_to_kernel(skel->links.dump_bpf_prog, "progs.debug");
+ err = send_link_to_kernel(skel->links.dump_bpf_prog_fd, "progs.debug");
if (err)
goto cleanup;
diff --git a/kernel/bpf/preload/iterators/iterators.lskel.h b/kernel/bpf/preload/iterators/iterators.lskel.h
new file mode 100644
index 000000000000..d90562d672d2
--- /dev/null
+++ b/kernel/bpf/preload/iterators/iterators.lskel.h
@@ -0,0 +1,428 @@
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+/* THIS FILE IS AUTOGENERATED! */
+#ifndef __ITERATORS_BPF_SKEL_H__
+#define __ITERATORS_BPF_SKEL_H__
+
+#include <stdlib.h>
+#include <bpf/bpf.h>
+#include <bpf/skel_internal.h>
+
+struct iterators_bpf {
+ struct bpf_loader_ctx ctx;
+ struct {
+ struct bpf_map_desc rodata;
+ } maps;
+ struct {
+ struct bpf_prog_desc dump_bpf_map;
+ struct bpf_prog_desc dump_bpf_prog;
+ } progs;
+ struct {
+ int dump_bpf_map_fd;
+ int dump_bpf_prog_fd;
+ } links;
+ struct iterators_bpf__rodata {
+ } *rodata;
+};
+
+static inline int
+iterators_bpf__dump_bpf_map__attach(struct iterators_bpf *skel)
+{
+ int prog_fd = skel->progs.dump_bpf_map.prog_fd;
+ int fd = skel_link_create(prog_fd, 0, BPF_TRACE_ITER);
+
+ if (fd > 0)
+ skel->links.dump_bpf_map_fd = fd;
+ return fd;
+}
+
+static inline int
+iterators_bpf__dump_bpf_prog__attach(struct iterators_bpf *skel)
+{
+ int prog_fd = skel->progs.dump_bpf_prog.prog_fd;
+ int fd = skel_link_create(prog_fd, 0, BPF_TRACE_ITER);
+
+ if (fd > 0)
+ skel->links.dump_bpf_prog_fd = fd;
+ return fd;
+}
+
+static inline int
+iterators_bpf__attach(struct iterators_bpf *skel)
+{
+ int ret = 0;
+
+ ret = ret < 0 ? ret : iterators_bpf__dump_bpf_map__attach(skel);
+ ret = ret < 0 ? ret : iterators_bpf__dump_bpf_prog__attach(skel);
+ return ret < 0 ? ret : 0;
+}
+
+static inline void
+iterators_bpf__detach(struct iterators_bpf *skel)
+{
+ skel_closenz(skel->links.dump_bpf_map_fd);
+ skel_closenz(skel->links.dump_bpf_prog_fd);
+}
+static void
+iterators_bpf__destroy(struct iterators_bpf *skel)
+{
+ if (!skel)
+ return;
+ iterators_bpf__detach(skel);
+ skel_closenz(skel->progs.dump_bpf_map.prog_fd);
+ skel_closenz(skel->progs.dump_bpf_prog.prog_fd);
+ munmap(skel->rodata, 4096);
+ skel_closenz(skel->maps.rodata.map_fd);
+ free(skel);
+}
+static inline struct iterators_bpf *
+iterators_bpf__open(void)
+{
+ struct iterators_bpf *skel;
+
+ skel = calloc(sizeof(*skel), 1);
+ if (!skel)
+ goto cleanup;
+ skel->ctx.sz = (void *)&skel->links - (void *)skel;
+ skel->rodata =
+ mmap(NULL, 4096, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ if (skel->rodata == (void *) -1)
+ goto cleanup;
+ memcpy(skel->rodata, (void *)"\
+\x20\x20\x69\x64\x20\x6e\x61\x6d\x65\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\
+\x20\x20\x20\x6d\x61\x78\x5f\x65\x6e\x74\x72\x69\x65\x73\x0a\0\x25\x34\x75\x20\
+\x25\x2d\x31\x36\x73\x25\x36\x64\x0a\0\x20\x20\x69\x64\x20\x6e\x61\x6d\x65\x20\
+\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x61\x74\x74\x61\x63\x68\x65\
+\x64\x0a\0\x25\x34\x75\x20\x25\x2d\x31\x36\x73\x20\x25\x73\x20\x25\x73\x0a\0", 98);
+ skel->maps.rodata.initial_value = (__u64)(long)skel->rodata;
+ return skel;
+cleanup:
+ iterators_bpf__destroy(skel);
+ return NULL;
+}
+
+static inline int
+iterators_bpf__load(struct iterators_bpf *skel)
+{
+ struct bpf_load_and_run_opts opts = {};
+ int err;
+
+ opts.ctx = (struct bpf_loader_ctx *)skel;
+ opts.data_sz = 6056;
+ opts.data = (void *)"\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
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+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
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+\0\0\0\0";
+ opts.insns_sz = 2184;
+ opts.insns = (void *)"\
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+\x10\x0f\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x98\x0e\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x18\x0f\0\0\x7b\x01\0\0\0\0\0\0\xb7\x01\0\0\x02\0\0\0\
+\x18\x62\0\0\0\0\0\0\0\0\0\0\x08\x0f\0\0\xb7\x03\0\0\x20\0\0\0\x85\0\0\0\xa6\0\
+\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\xa3\xff\0\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\x61\x20\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x28\x0f\0\0\x63\x01\0\0\
+\0\0\0\0\xb7\x01\0\0\x16\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\x28\x0f\0\0\xb7\x03\
+\0\0\x04\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\x96\xff\0\0\0\0\
+\x18\x60\0\0\0\0\0\0\0\0\0\0\x30\x0f\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x78\x11\0\
+\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x38\x0f\0\0\x18\x61\0\0\0\0\
+\0\0\0\0\0\0\x70\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x40\
+\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xb8\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\
+\0\0\0\0\0\0\0\0\0\x48\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xc8\x11\0\0\x7b\x01\
+\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xe8\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\
+\0\xe8\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x18\x61\
+\0\0\0\0\0\0\0\0\0\0\xe0\x11\0\0\x7b\x01\0\0\0\0\0\0\x61\x60\x08\0\0\0\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x80\x11\0\0\x63\x01\0\0\0\0\0\0\x61\x60\x0c\0\0\0\0\0\
+\x18\x61\0\0\0\0\0\0\0\0\0\0\x84\x11\0\0\x63\x01\0\0\0\0\0\0\x79\x60\x10\0\0\0\
+\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x88\x11\0\0\x7b\x01\0\0\0\0\0\0\x61\xa0\x78\
+\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xb0\x11\0\0\x63\x01\0\0\0\0\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\xf8\x11\0\0\xb7\x02\0\0\x11\0\0\0\xb7\x03\0\0\x0c\0\0\
+\0\xb7\x04\0\0\0\0\0\0\x85\0\0\0\xa7\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\x60\xff\
+\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x68\x11\0\0\x63\x70\x6c\0\0\0\0\0\x77\x07\
+\0\0\x20\0\0\0\x63\x70\x70\0\0\0\0\0\xb7\x01\0\0\x05\0\0\0\x18\x62\0\0\0\0\0\0\
+\0\0\0\0\x68\x11\0\0\xb7\x03\0\0\x8c\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\
+\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xd8\x11\0\0\x61\x01\0\0\0\0\0\0\xd5\x01\x02\0\
+\0\0\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\xc5\x07\x4e\xff\0\0\0\0\x63\
+\x7a\x80\xff\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x10\x12\0\0\x18\x61\0\0\0\0\0\
+\0\0\0\0\0\x10\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x18\x12\
+\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x08\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\
+\0\0\0\0\0\0\0\x28\x14\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x50\x17\0\0\x7b\x01\0\0\
+\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x30\x14\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
+\x60\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xd0\x15\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x80\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x78\x17\0\0\x7b\x01\0\0\0\0\0\0\x61\
+\x60\x08\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x18\x17\0\0\x63\x01\0\0\0\0\0\0\
+\x61\x60\x0c\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x1c\x17\0\0\x63\x01\0\0\0\0\
+\0\0\x79\x60\x10\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x20\x17\0\0\x7b\x01\0\0\
+\0\0\0\0\x61\xa0\x78\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x48\x17\0\0\x63\
+\x01\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x90\x17\0\0\xb7\x02\0\0\x12\0\0\0\
+\xb7\x03\0\0\x0c\0\0\0\xb7\x04\0\0\0\0\0\0\x85\0\0\0\xa7\0\0\0\xbf\x07\0\0\0\0\
+\0\0\xc5\x07\x17\xff\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\x63\x70\x6c\
+\0\0\0\0\0\x77\x07\0\0\x20\0\0\0\x63\x70\x70\0\0\0\0\0\xb7\x01\0\0\x05\0\0\0\
+\x18\x62\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\xb7\x03\0\0\x8c\0\0\0\x85\0\0\0\xa6\0\0\
+\0\xbf\x07\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x70\x17\0\0\x61\x01\0\0\0\0\
+\0\0\xd5\x01\x02\0\0\0\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\xc5\x07\x05\
+\xff\0\0\0\0\x63\x7a\x84\xff\0\0\0\0\x61\xa1\x78\xff\0\0\0\0\xd5\x01\x02\0\0\0\
+\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\x61\xa0\x80\xff\0\0\0\0\x63\x06\
+\x28\0\0\0\0\0\x61\xa0\x84\xff\0\0\0\0\x63\x06\x2c\0\0\0\0\0\x18\x61\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\x61\x10\0\0\0\0\0\0\x63\x06\x18\0\0\0\0\0\xb7\0\0\0\0\0\0\0\
+\x95\0\0\0\0\0\0\0";
+ err = bpf_load_and_run(&opts);
+ if (err < 0)
+ return err;
+ skel->rodata =
+ mmap(skel->rodata, 4096, PROT_READ, MAP_SHARED | MAP_FIXED,
+ skel->maps.rodata.map_fd, 0);
+ return 0;
+}
+
+static inline struct iterators_bpf *
+iterators_bpf__open_and_load(void)
+{
+ struct iterators_bpf *skel;
+
+ skel = iterators_bpf__open();
+ if (!skel)
+ return NULL;
+ if (iterators_bpf__load(skel)) {
+ iterators_bpf__destroy(skel);
+ return NULL;
+ }
+ return skel;
+}
+
+#endif /* __ITERATORS_BPF_SKEL_H__ */
diff --git a/kernel/bpf/preload/iterators/iterators.skel.h b/kernel/bpf/preload/iterators/iterators.skel.h
deleted file mode 100644
index cf9a6a94b3a4..000000000000
--- a/kernel/bpf/preload/iterators/iterators.skel.h
+++ /dev/null
@@ -1,412 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-
-/* THIS FILE IS AUTOGENERATED! */
-#ifndef __ITERATORS_BPF_SKEL_H__
-#define __ITERATORS_BPF_SKEL_H__
-
-#include <stdlib.h>
-#include <bpf/libbpf.h>
-
-struct iterators_bpf {
- struct bpf_object_skeleton *skeleton;
- struct bpf_object *obj;
- struct {
- struct bpf_map *rodata;
- } maps;
- struct {
- struct bpf_program *dump_bpf_map;
- struct bpf_program *dump_bpf_prog;
- } progs;
- struct {
- struct bpf_link *dump_bpf_map;
- struct bpf_link *dump_bpf_prog;
- } links;
- struct iterators_bpf__rodata {
- char dump_bpf_map____fmt[35];
- char dump_bpf_map____fmt_1[14];
- char dump_bpf_prog____fmt[32];
- char dump_bpf_prog____fmt_2[17];
- } *rodata;
-};
-
-static void
-iterators_bpf__destroy(struct iterators_bpf *obj)
-{
- if (!obj)
- return;
- if (obj->skeleton)
- bpf_object__destroy_skeleton(obj->skeleton);
- free(obj);
-}
-
-static inline int
-iterators_bpf__create_skeleton(struct iterators_bpf *obj);
-
-static inline struct iterators_bpf *
-iterators_bpf__open_opts(const struct bpf_object_open_opts *opts)
-{
- struct iterators_bpf *obj;
-
- obj = (struct iterators_bpf *)calloc(1, sizeof(*obj));
- if (!obj)
- return NULL;
- if (iterators_bpf__create_skeleton(obj))
- goto err;
- if (bpf_object__open_skeleton(obj->skeleton, opts))
- goto err;
-
- return obj;
-err:
- iterators_bpf__destroy(obj);
- return NULL;
-}
-
-static inline struct iterators_bpf *
-iterators_bpf__open(void)
-{
- return iterators_bpf__open_opts(NULL);
-}
-
-static inline int
-iterators_bpf__load(struct iterators_bpf *obj)
-{
- return bpf_object__load_skeleton(obj->skeleton);
-}
-
-static inline struct iterators_bpf *
-iterators_bpf__open_and_load(void)
-{
- struct iterators_bpf *obj;
-
- obj = iterators_bpf__open();
- if (!obj)
- return NULL;
- if (iterators_bpf__load(obj)) {
- iterators_bpf__destroy(obj);
- return NULL;
- }
- return obj;
-}
-
-static inline int
-iterators_bpf__attach(struct iterators_bpf *obj)
-{
- return bpf_object__attach_skeleton(obj->skeleton);
-}
-
-static inline void
-iterators_bpf__detach(struct iterators_bpf *obj)
-{
- return bpf_object__detach_skeleton(obj->skeleton);
-}
-
-static inline int
-iterators_bpf__create_skeleton(struct iterators_bpf *obj)
-{
- struct bpf_object_skeleton *s;
-
- s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
- if (!s)
- return -1;
- obj->skeleton = s;
-
- s->sz = sizeof(*s);
- s->name = "iterators_bpf";
- s->obj = &obj->obj;
-
- /* maps */
- s->map_cnt = 1;
- s->map_skel_sz = sizeof(*s->maps);
- s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
- if (!s->maps)
- goto err;
-
- s->maps[0].name = "iterator.rodata";
- s->maps[0].map = &obj->maps.rodata;
- s->maps[0].mmaped = (void **)&obj->rodata;
-
- /* programs */
- s->prog_cnt = 2;
- s->prog_skel_sz = sizeof(*s->progs);
- s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
- if (!s->progs)
- goto err;
-
- s->progs[0].name = "dump_bpf_map";
- s->progs[0].prog = &obj->progs.dump_bpf_map;
- s->progs[0].link = &obj->links.dump_bpf_map;
-
- s->progs[1].name = "dump_bpf_prog";
- s->progs[1].prog = &obj->progs.dump_bpf_prog;
- s->progs[1].link = &obj->links.dump_bpf_prog;
-
- s->data_sz = 7176;
- s->data = (void *)"\
-\x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
-\0\0\0\0\0\0\0\0\0\0\0\x48\x18\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\x0f\0\
-\x0e\0\x79\x12\0\0\0\0\0\0\x79\x26\0\0\0\0\0\0\x79\x17\x08\0\0\0\0\0\x15\x07\
-\x1a\0\0\0\0\0\x79\x21\x10\0\0\0\0\0\x55\x01\x08\0\0\0\0\0\xbf\xa4\0\0\0\0\0\0\
-\x07\x04\0\0\xe8\xff\xff\xff\xbf\x61\0\0\0\0\0\0\x18\x02\0\0\0\0\0\0\0\0\0\0\0\
-\0\0\0\xb7\x03\0\0\x23\0\0\0\xb7\x05\0\0\0\0\0\0\x85\0\0\0\x7e\0\0\0\x61\x71\0\
-\0\0\0\0\0\x7b\x1a\xe8\xff\0\0\0\0\xb7\x01\0\0\x04\0\0\0\xbf\x72\0\0\0\0\0\0\
-\x0f\x12\0\0\0\0\0\0\x7b\x2a\xf0\xff\0\0\0\0\x61\x71\x14\0\0\0\0\0\x7b\x1a\xf8\
-\xff\0\0\0\0\xbf\xa4\0\0\0\0\0\0\x07\x04\0\0\xe8\xff\xff\xff\xbf\x61\0\0\0\0\0\
-\0\x18\x02\0\0\x23\0\0\0\0\0\0\0\0\0\0\0\xb7\x03\0\0\x0e\0\0\0\xb7\x05\0\0\x18\
-\0\0\0\x85\0\0\0\x7e\0\0\0\xb7\0\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\x79\x12\0\0\0\0\
-\0\0\x79\x26\0\0\0\0\0\0\x79\x11\x08\0\0\0\0\0\x15\x01\x3b\0\0\0\0\0\x79\x17\0\
-\0\0\0\0\0\x79\x21\x10\0\0\0\0\0\x55\x01\x08\0\0\0\0\0\xbf\xa4\0\0\0\0\0\0\x07\
-\x04\0\0\xd0\xff\xff\xff\xbf\x61\0\0\0\0\0\0\x18\x02\0\0\x31\0\0\0\0\0\0\0\0\0\
-\0\0\xb7\x03\0\0\x20\0\0\0\xb7\x05\0\0\0\0\0\0\x85\0\0\0\x7e\0\0\0\x7b\x6a\xc8\
-\xff\0\0\0\0\x61\x71\0\0\0\0\0\0\x7b\x1a\xd0\xff\0\0\0\0\xb7\x03\0\0\x04\0\0\0\
-\xbf\x79\0\0\0\0\0\0\x0f\x39\0\0\0\0\0\0\x79\x71\x28\0\0\0\0\0\x79\x78\x30\0\0\
-\0\0\0\x15\x08\x18\0\0\0\0\0\xb7\x02\0\0\0\0\0\0\x0f\x21\0\0\0\0\0\0\x61\x11\
-\x04\0\0\0\0\0\x79\x83\x08\0\0\0\0\0\x67\x01\0\0\x03\0\0\0\x0f\x13\0\0\0\0\0\0\
-\x79\x86\0\0\0\0\0\0\xbf\xa1\0\0\0\0\0\0\x07\x01\0\0\xf8\xff\xff\xff\xb7\x02\0\
-\0\x08\0\0\0\x85\0\0\0\x71\0\0\0\xb7\x01\0\0\0\0\0\0\x79\xa3\xf8\xff\0\0\0\0\
-\x0f\x13\0\0\0\0\0\0\xbf\xa1\0\0\0\0\0\0\x07\x01\0\0\xf4\xff\xff\xff\xb7\x02\0\
-\0\x04\0\0\0\x85\0\0\0\x71\0\0\0\xb7\x03\0\0\x04\0\0\0\x61\xa1\xf4\xff\0\0\0\0\
-\x61\x82\x10\0\0\0\0\0\x3d\x21\x02\0\0\0\0\0\x0f\x16\0\0\0\0\0\0\xbf\x69\0\0\0\
-\0\0\0\x7b\x9a\xd8\xff\0\0\0\0\x79\x71\x18\0\0\0\0\0\x7b\x1a\xe0\xff\0\0\0\0\
-\x79\x71\x20\0\0\0\0\0\x79\x11\0\0\0\0\0\0\x0f\x31\0\0\0\0\0\0\x7b\x1a\xe8\xff\
-\0\0\0\0\xbf\xa4\0\0\0\0\0\0\x07\x04\0\0\xd0\xff\xff\xff\x79\xa1\xc8\xff\0\0\0\
-\0\x18\x02\0\0\x51\0\0\0\0\0\0\0\0\0\0\0\xb7\x03\0\0\x11\0\0\0\xb7\x05\0\0\x20\
-\0\0\0\x85\0\0\0\x7e\0\0\0\xb7\0\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\x20\x20\x69\x64\
-\x20\x6e\x61\x6d\x65\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x6d\
-\x61\x78\x5f\x65\x6e\x74\x72\x69\x65\x73\x0a\0\x25\x34\x75\x20\x25\x2d\x31\x36\
-\x73\x25\x36\x64\x0a\0\x20\x20\x69\x64\x20\x6e\x61\x6d\x65\x20\x20\x20\x20\x20\
-\x20\x20\x20\x20\x20\x20\x20\x20\x61\x74\x74\x61\x63\x68\x65\x64\x0a\0\x25\x34\
-\x75\x20\x25\x2d\x31\x36\x73\x20\x25\x73\x20\x25\x73\x0a\0\x47\x50\x4c\0\x9f\
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-\0\0\x03\x4c\xff\x6f\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\x20\x17\0\0\0\0\0\0\x07\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xa1\0\0\0\x03\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x27\x17\0\0\0\0\0\0\x1a\x01\0\0\0\0\0\0\
-\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
-
- return 0;
-err:
- bpf_object__destroy_skeleton(s);
- return -1;
-}
-
-#endif /* __ITERATORS_BPF_SKEL_H__ */
diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
index 5e7edf913060..7224691df2ec 100644
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c
@@ -213,7 +213,7 @@ static void __bpf_tramp_image_put_deferred(struct work_struct *work)
im = container_of(work, struct bpf_tramp_image, work);
bpf_image_ksym_del(&im->ksym);
bpf_jit_free_exec(im->image);
- bpf_jit_uncharge_modmem(1);
+ bpf_jit_uncharge_modmem(PAGE_SIZE);
percpu_ref_exit(&im->pcref);
kfree_rcu(im, rcu);
}
@@ -310,7 +310,7 @@ static struct bpf_tramp_image *bpf_tramp_image_alloc(u64 key, u32 idx)
if (!im)
goto out;
- err = bpf_jit_charge_modmem(1);
+ err = bpf_jit_charge_modmem(PAGE_SIZE);
if (err)
goto out_free_im;
@@ -332,7 +332,7 @@ static struct bpf_tramp_image *bpf_tramp_image_alloc(u64 key, u32 idx)
out_free_image:
bpf_jit_free_exec(im->image);
out_uncharge:
- bpf_jit_uncharge_modmem(1);
+ bpf_jit_uncharge_modmem(PAGE_SIZE);
out_free_im:
kfree(im);
out:
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index dcf065ec2774..bbef86cb4e72 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -536,7 +536,7 @@ static bool is_cmpxchg_insn(const struct bpf_insn *insn)
static const char *reg_type_str(struct bpf_verifier_env *env,
enum bpf_reg_type type)
{
- char postfix[16] = {0}, prefix[16] = {0};
+ char postfix[16] = {0}, prefix[32] = {0};
static const char * const str[] = {
[NOT_INIT] = "?",
[SCALAR_VALUE] = "inv",
@@ -570,9 +570,11 @@ static const char *reg_type_str(struct bpf_verifier_env *env,
}
if (type & MEM_RDONLY)
- strncpy(prefix, "rdonly_", 16);
+ strncpy(prefix, "rdonly_", 32);
if (type & MEM_ALLOC)
- strncpy(prefix, "alloc_", 16);
+ strncpy(prefix, "alloc_", 32);
+ if (type & MEM_USER)
+ strncpy(prefix, "user_", 32);
snprintf(env->type_str_buf, TYPE_STR_BUF_LEN, "%s%s%s",
prefix, str[base_type(type)], postfix);
@@ -1547,14 +1549,15 @@ static void mark_reg_not_init(struct bpf_verifier_env *env,
static void mark_btf_ld_reg(struct bpf_verifier_env *env,
struct bpf_reg_state *regs, u32 regno,
enum bpf_reg_type reg_type,
- struct btf *btf, u32 btf_id)
+ struct btf *btf, u32 btf_id,
+ enum bpf_type_flag flag)
{
if (reg_type == SCALAR_VALUE) {
mark_reg_unknown(env, regs, regno);
return;
}
mark_reg_known_zero(env, regs, regno);
- regs[regno].type = PTR_TO_BTF_ID;
+ regs[regno].type = PTR_TO_BTF_ID | flag;
regs[regno].btf = btf;
regs[regno].btf_id = btf_id;
}
@@ -4152,6 +4155,7 @@ static int check_ptr_to_btf_access(struct bpf_verifier_env *env,
struct bpf_reg_state *reg = regs + regno;
const struct btf_type *t = btf_type_by_id(reg->btf, reg->btf_id);
const char *tname = btf_name_by_offset(reg->btf, t->name_off);
+ enum bpf_type_flag flag = 0;
u32 btf_id;
int ret;
@@ -4171,9 +4175,16 @@ static int check_ptr_to_btf_access(struct bpf_verifier_env *env,
return -EACCES;
}
+ if (reg->type & MEM_USER) {
+ verbose(env,
+ "R%d is ptr_%s access user memory: off=%d\n",
+ regno, tname, off);
+ return -EACCES;
+ }
+
if (env->ops->btf_struct_access) {
ret = env->ops->btf_struct_access(&env->log, reg->btf, t,
- off, size, atype, &btf_id);
+ off, size, atype, &btf_id, &flag);
} else {
if (atype != BPF_READ) {
verbose(env, "only read is supported\n");
@@ -4181,14 +4192,14 @@ static int check_ptr_to_btf_access(struct bpf_verifier_env *env,
}
ret = btf_struct_access(&env->log, reg->btf, t, off, size,
- atype, &btf_id);
+ atype, &btf_id, &flag);
}
if (ret < 0)
return ret;
if (atype == BPF_READ && value_regno >= 0)
- mark_btf_ld_reg(env, regs, value_regno, ret, reg->btf, btf_id);
+ mark_btf_ld_reg(env, regs, value_regno, ret, reg->btf, btf_id, flag);
return 0;
}
@@ -4201,6 +4212,7 @@ static int check_ptr_to_map_access(struct bpf_verifier_env *env,
{
struct bpf_reg_state *reg = regs + regno;
struct bpf_map *map = reg->map_ptr;
+ enum bpf_type_flag flag = 0;
const struct btf_type *t;
const char *tname;
u32 btf_id;
@@ -4238,12 +4250,12 @@ static int check_ptr_to_map_access(struct bpf_verifier_env *env,
return -EACCES;
}
- ret = btf_struct_access(&env->log, btf_vmlinux, t, off, size, atype, &btf_id);
+ ret = btf_struct_access(&env->log, btf_vmlinux, t, off, size, atype, &btf_id, &flag);
if (ret < 0)
return ret;
if (value_regno >= 0)
- mark_btf_ld_reg(env, regs, value_regno, ret, btf_vmlinux, btf_id);
+ mark_btf_ld_reg(env, regs, value_regno, ret, btf_vmlinux, btf_id, flag);
return 0;
}
@@ -4444,7 +4456,8 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn
if (err < 0)
return err;
- err = check_ctx_access(env, insn_idx, off, size, t, &reg_type, &btf, &btf_id);
+ err = check_ctx_access(env, insn_idx, off, size, t, &reg_type, &btf,
+ &btf_id);
if (err)
verbose_linfo(env, insn_idx, "; ");
if (!err && t == BPF_READ && value_regno >= 0) {
@@ -13054,6 +13067,7 @@ static int jit_subprogs(struct bpf_verifier_env *env)
prog->jited = 1;
prog->bpf_func = func[0]->bpf_func;
+ prog->jited_len = func[0]->jited_len;
prog->aux->func = func;
prog->aux->func_cnt = env->subprog_cnt;
bpf_prog_jit_attempt_done(prog);
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 06a9e220069e..a2024ba32a20 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1235,6 +1235,8 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_get_task_stack_proto;
case BPF_FUNC_copy_from_user:
return prog->aux->sleepable ? &bpf_copy_from_user_proto : NULL;
+ case BPF_FUNC_copy_from_user_task:
+ return prog->aux->sleepable ? &bpf_copy_from_user_task_proto : NULL;
case BPF_FUNC_snprintf_btf:
return &bpf_snprintf_btf_proto;
case BPF_FUNC_per_cpu_ptr: