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-rw-r--r--kernel/bpf/Makefile2
-rw-r--r--kernel/bpf/arraymap.c2
-rw-r--r--kernel/bpf/bpf_lsm.c15
-rw-r--r--kernel/bpf/cgroup.c6
-rw-r--r--kernel/bpf/core.c3
-rw-r--r--kernel/bpf/helpers.c6
-rw-r--r--kernel/bpf/inode.c276
-rw-r--r--kernel/bpf/syscall.c228
-rw-r--r--kernel/bpf/token.c278
-rw-r--r--kernel/bpf/verifier.c13
-rw-r--r--kernel/trace/bpf_trace.c2
11 files changed, 736 insertions, 95 deletions
diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile
index f526b7573e97..4ce95acfcaa7 100644
--- a/kernel/bpf/Makefile
+++ b/kernel/bpf/Makefile
@@ -6,7 +6,7 @@ cflags-nogcse-$(CONFIG_X86)$(CONFIG_CC_IS_GCC) := -fno-gcse
endif
CFLAGS_core.o += $(call cc-disable-warning, override-init) $(cflags-nogcse-yy)
-obj-$(CONFIG_BPF_SYSCALL) += syscall.o verifier.o inode.o helpers.o tnum.o log.o
+obj-$(CONFIG_BPF_SYSCALL) += syscall.o verifier.o inode.o helpers.o tnum.o log.o token.o
obj-$(CONFIG_BPF_SYSCALL) += bpf_iter.o map_iter.o task_iter.o prog_iter.o link_iter.o
obj-$(CONFIG_BPF_SYSCALL) += hashtab.o arraymap.o percpu_freelist.o bpf_lru_list.o lpm_trie.o map_in_map.o bloom_filter.o
obj-$(CONFIG_BPF_SYSCALL) += local_storage.o queue_stack_maps.o ringbuf.o
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c
index 0bdbbbeab155..13358675ff2e 100644
--- a/kernel/bpf/arraymap.c
+++ b/kernel/bpf/arraymap.c
@@ -82,7 +82,7 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr)
bool percpu = attr->map_type == BPF_MAP_TYPE_PERCPU_ARRAY;
int numa_node = bpf_map_attr_numa_node(attr);
u32 elem_size, index_mask, max_entries;
- bool bypass_spec_v1 = bpf_bypass_spec_v1();
+ bool bypass_spec_v1 = bpf_bypass_spec_v1(NULL);
u64 array_size, mask64;
struct bpf_array *array;
diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c
index e8e910395bf6..63b4dc495125 100644
--- a/kernel/bpf/bpf_lsm.c
+++ b/kernel/bpf/bpf_lsm.c
@@ -260,9 +260,15 @@ bpf_lsm_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
BTF_SET_START(sleepable_lsm_hooks)
BTF_ID(func, bpf_lsm_bpf)
BTF_ID(func, bpf_lsm_bpf_map)
-BTF_ID(func, bpf_lsm_bpf_map_alloc_security)
-BTF_ID(func, bpf_lsm_bpf_map_free_security)
+BTF_ID(func, bpf_lsm_bpf_map_create)
+BTF_ID(func, bpf_lsm_bpf_map_free)
BTF_ID(func, bpf_lsm_bpf_prog)
+BTF_ID(func, bpf_lsm_bpf_prog_load)
+BTF_ID(func, bpf_lsm_bpf_prog_free)
+BTF_ID(func, bpf_lsm_bpf_token_create)
+BTF_ID(func, bpf_lsm_bpf_token_free)
+BTF_ID(func, bpf_lsm_bpf_token_cmd)
+BTF_ID(func, bpf_lsm_bpf_token_capable)
BTF_ID(func, bpf_lsm_bprm_check_security)
BTF_ID(func, bpf_lsm_bprm_committed_creds)
BTF_ID(func, bpf_lsm_bprm_committing_creds)
@@ -357,9 +363,8 @@ BTF_ID(func, bpf_lsm_userns_create)
BTF_SET_END(sleepable_lsm_hooks)
BTF_SET_START(untrusted_lsm_hooks)
-BTF_ID(func, bpf_lsm_bpf_map_free_security)
-BTF_ID(func, bpf_lsm_bpf_prog_alloc_security)
-BTF_ID(func, bpf_lsm_bpf_prog_free_security)
+BTF_ID(func, bpf_lsm_bpf_map_free)
+BTF_ID(func, bpf_lsm_bpf_prog_free)
BTF_ID(func, bpf_lsm_file_alloc_security)
BTF_ID(func, bpf_lsm_file_free_security)
#ifdef CONFIG_SECURITY_NETWORK
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 491d20038cbe..98e0e3835b28 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1630,7 +1630,7 @@ cgroup_dev_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_perf_event_output:
return &bpf_event_output_data_proto;
default:
- return bpf_base_func_proto(func_id);
+ return bpf_base_func_proto(func_id, prog);
}
}
@@ -2191,7 +2191,7 @@ sysctl_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_perf_event_output:
return &bpf_event_output_data_proto;
default:
- return bpf_base_func_proto(func_id);
+ return bpf_base_func_proto(func_id, prog);
}
}
@@ -2348,7 +2348,7 @@ cg_sockopt_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_perf_event_output:
return &bpf_event_output_data_proto;
default:
- return bpf_base_func_proto(func_id);
+ return bpf_base_func_proto(func_id, prog);
}
}
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index fbb1d95a9b44..71c459a51d9e 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -682,7 +682,7 @@ static bool bpf_prog_kallsyms_candidate(const struct bpf_prog *fp)
void bpf_prog_kallsyms_add(struct bpf_prog *fp)
{
if (!bpf_prog_kallsyms_candidate(fp) ||
- !bpf_capable())
+ !bpf_token_capable(fp->aux->token, CAP_BPF))
return;
bpf_prog_ksym_set_addr(fp);
@@ -2779,6 +2779,7 @@ void bpf_prog_free(struct bpf_prog *fp)
if (aux->dst_prog)
bpf_prog_put(aux->dst_prog);
+ bpf_token_put(aux->token);
INIT_WORK(&aux->work, bpf_prog_free_deferred);
schedule_work(&aux->work);
}
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index e04ca1af8927..bcb951a2ecf4 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -1680,7 +1680,7 @@ const struct bpf_func_proto bpf_probe_read_kernel_str_proto __weak;
const struct bpf_func_proto bpf_task_pt_regs_proto __weak;
const struct bpf_func_proto *
-bpf_base_func_proto(enum bpf_func_id func_id)
+bpf_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
switch (func_id) {
case BPF_FUNC_map_lookup_elem:
@@ -1731,7 +1731,7 @@ bpf_base_func_proto(enum bpf_func_id func_id)
break;
}
- if (!bpf_capable())
+ if (!bpf_token_capable(prog->aux->token, CAP_BPF))
return NULL;
switch (func_id) {
@@ -1789,7 +1789,7 @@ bpf_base_func_proto(enum bpf_func_id func_id)
break;
}
- if (!perfmon_capable())
+ if (!bpf_token_capable(prog->aux->token, CAP_PERFMON))
return NULL;
switch (func_id) {
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index 41e0a55c35f5..af5d2ffadd70 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -20,6 +20,7 @@
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/bpf_trace.h>
+#include <linux/kstrtox.h>
#include "preload/bpf_preload.h"
enum bpf_type {
@@ -98,9 +99,9 @@ static const struct inode_operations bpf_prog_iops = { };
static const struct inode_operations bpf_map_iops = { };
static const struct inode_operations bpf_link_iops = { };
-static struct inode *bpf_get_inode(struct super_block *sb,
- const struct inode *dir,
- umode_t mode)
+struct inode *bpf_get_inode(struct super_block *sb,
+ const struct inode *dir,
+ umode_t mode)
{
struct inode *inode;
@@ -594,6 +595,136 @@ struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type typ
}
EXPORT_SYMBOL(bpf_prog_get_type_path);
+struct bpffs_btf_enums {
+ const struct btf *btf;
+ const struct btf_type *cmd_t;
+ const struct btf_type *map_t;
+ const struct btf_type *prog_t;
+ const struct btf_type *attach_t;
+};
+
+static int find_bpffs_btf_enums(struct bpffs_btf_enums *info)
+{
+ const struct btf *btf;
+ const struct btf_type *t;
+ const char *name;
+ int i, n;
+
+ memset(info, 0, sizeof(*info));
+
+ btf = bpf_get_btf_vmlinux();
+ if (IS_ERR(btf))
+ return PTR_ERR(btf);
+ if (!btf)
+ return -ENOENT;
+
+ info->btf = btf;
+
+ for (i = 1, n = btf_nr_types(btf); i < n; i++) {
+ t = btf_type_by_id(btf, i);
+ if (!btf_type_is_enum(t))
+ continue;
+
+ name = btf_name_by_offset(btf, t->name_off);
+ if (!name)
+ continue;
+
+ if (strcmp(name, "bpf_cmd") == 0)
+ info->cmd_t = t;
+ else if (strcmp(name, "bpf_map_type") == 0)
+ info->map_t = t;
+ else if (strcmp(name, "bpf_prog_type") == 0)
+ info->prog_t = t;
+ else if (strcmp(name, "bpf_attach_type") == 0)
+ info->attach_t = t;
+ else
+ continue;
+
+ if (info->cmd_t && info->map_t && info->prog_t && info->attach_t)
+ return 0;
+ }
+
+ return -ESRCH;
+}
+
+static bool find_btf_enum_const(const struct btf *btf, const struct btf_type *enum_t,
+ const char *prefix, const char *str, int *value)
+{
+ const struct btf_enum *e;
+ const char *name;
+ int i, n, pfx_len = strlen(prefix);
+
+ *value = 0;
+
+ if (!btf || !enum_t)
+ return false;
+
+ for (i = 0, n = btf_vlen(enum_t); i < n; i++) {
+ e = &btf_enum(enum_t)[i];
+
+ name = btf_name_by_offset(btf, e->name_off);
+ if (!name || strncasecmp(name, prefix, pfx_len) != 0)
+ continue;
+
+ /* match symbolic name case insensitive and ignoring prefix */
+ if (strcasecmp(name + pfx_len, str) == 0) {
+ *value = e->val;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static void seq_print_delegate_opts(struct seq_file *m,
+ const char *opt_name,
+ const struct btf *btf,
+ const struct btf_type *enum_t,
+ const char *prefix,
+ u64 delegate_msk, u64 any_msk)
+{
+ const struct btf_enum *e;
+ bool first = true;
+ const char *name;
+ u64 msk;
+ int i, n, pfx_len = strlen(prefix);
+
+ delegate_msk &= any_msk; /* clear unknown bits */
+
+ if (delegate_msk == 0)
+ return;
+
+ seq_printf(m, ",%s", opt_name);
+ if (delegate_msk == any_msk) {
+ seq_printf(m, "=any");
+ return;
+ }
+
+ if (btf && enum_t) {
+ for (i = 0, n = btf_vlen(enum_t); i < n; i++) {
+ e = &btf_enum(enum_t)[i];
+ name = btf_name_by_offset(btf, e->name_off);
+ if (!name || strncasecmp(name, prefix, pfx_len) != 0)
+ continue;
+ msk = 1ULL << e->val;
+ if (delegate_msk & msk) {
+ /* emit lower-case name without prefix */
+ seq_printf(m, "%c", first ? '=' : ':');
+ name += pfx_len;
+ while (*name) {
+ seq_printf(m, "%c", tolower(*name));
+ name++;
+ }
+
+ delegate_msk &= ~msk;
+ first = false;
+ }
+ }
+ }
+ if (delegate_msk)
+ seq_printf(m, "%c0x%llx", first ? '=' : ':', delegate_msk);
+}
+
/*
* Display the mount options in /proc/mounts.
*/
@@ -601,6 +732,8 @@ static int bpf_show_options(struct seq_file *m, struct dentry *root)
{
struct inode *inode = d_inode(root);
umode_t mode = inode->i_mode & S_IALLUGO & ~S_ISVTX;
+ struct bpf_mount_opts *opts = root->d_sb->s_fs_info;
+ u64 mask;
if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID))
seq_printf(m, ",uid=%u",
@@ -610,6 +743,35 @@ static int bpf_show_options(struct seq_file *m, struct dentry *root)
from_kgid_munged(&init_user_ns, inode->i_gid));
if (mode != S_IRWXUGO)
seq_printf(m, ",mode=%o", mode);
+
+ if (opts->delegate_cmds || opts->delegate_maps ||
+ opts->delegate_progs || opts->delegate_attachs) {
+ struct bpffs_btf_enums info;
+
+ /* ignore errors, fallback to hex */
+ (void)find_bpffs_btf_enums(&info);
+
+ mask = (1ULL << __MAX_BPF_CMD) - 1;
+ seq_print_delegate_opts(m, "delegate_cmds",
+ info.btf, info.cmd_t, "BPF_",
+ opts->delegate_cmds, mask);
+
+ mask = (1ULL << __MAX_BPF_MAP_TYPE) - 1;
+ seq_print_delegate_opts(m, "delegate_maps",
+ info.btf, info.map_t, "BPF_MAP_TYPE_",
+ opts->delegate_maps, mask);
+
+ mask = (1ULL << __MAX_BPF_PROG_TYPE) - 1;
+ seq_print_delegate_opts(m, "delegate_progs",
+ info.btf, info.prog_t, "BPF_PROG_TYPE_",
+ opts->delegate_progs, mask);
+
+ mask = (1ULL << __MAX_BPF_ATTACH_TYPE) - 1;
+ seq_print_delegate_opts(m, "delegate_attachs",
+ info.btf, info.attach_t, "BPF_",
+ opts->delegate_attachs, mask);
+ }
+
return 0;
}
@@ -624,7 +786,7 @@ static void bpf_free_inode(struct inode *inode)
free_inode_nonrcu(inode);
}
-static const struct super_operations bpf_super_ops = {
+const struct super_operations bpf_super_ops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
.show_options = bpf_show_options,
@@ -635,28 +797,30 @@ enum {
OPT_UID,
OPT_GID,
OPT_MODE,
+ OPT_DELEGATE_CMDS,
+ OPT_DELEGATE_MAPS,
+ OPT_DELEGATE_PROGS,
+ OPT_DELEGATE_ATTACHS,
};
static const struct fs_parameter_spec bpf_fs_parameters[] = {
fsparam_u32 ("uid", OPT_UID),
fsparam_u32 ("gid", OPT_GID),
fsparam_u32oct ("mode", OPT_MODE),
+ fsparam_string ("delegate_cmds", OPT_DELEGATE_CMDS),
+ fsparam_string ("delegate_maps", OPT_DELEGATE_MAPS),
+ fsparam_string ("delegate_progs", OPT_DELEGATE_PROGS),
+ fsparam_string ("delegate_attachs", OPT_DELEGATE_ATTACHS),
{}
};
-struct bpf_mount_opts {
- kuid_t uid;
- kgid_t gid;
- umode_t mode;
-};
-
static int bpf_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
- struct bpf_mount_opts *opts = fc->fs_private;
+ struct bpf_mount_opts *opts = fc->s_fs_info;
struct fs_parse_result result;
kuid_t uid;
kgid_t gid;
- int opt;
+ int opt, err;
opt = fs_parse(fc, bpf_fs_parameters, param, &result);
if (opt < 0) {
@@ -708,6 +872,67 @@ static int bpf_parse_param(struct fs_context *fc, struct fs_parameter *param)
case OPT_MODE:
opts->mode = result.uint_32 & S_IALLUGO;
break;
+ case OPT_DELEGATE_CMDS:
+ case OPT_DELEGATE_MAPS:
+ case OPT_DELEGATE_PROGS:
+ case OPT_DELEGATE_ATTACHS: {
+ struct bpffs_btf_enums info;
+ const struct btf_type *enum_t;
+ const char *enum_pfx;
+ u64 *delegate_msk, msk = 0;
+ char *p;
+ int val;
+
+ /* ignore errors, fallback to hex */
+ (void)find_bpffs_btf_enums(&info);
+
+ switch (opt) {
+ case OPT_DELEGATE_CMDS:
+ delegate_msk = &opts->delegate_cmds;
+ enum_t = info.cmd_t;
+ enum_pfx = "BPF_";
+ break;
+ case OPT_DELEGATE_MAPS:
+ delegate_msk = &opts->delegate_maps;
+ enum_t = info.map_t;
+ enum_pfx = "BPF_MAP_TYPE_";
+ break;
+ case OPT_DELEGATE_PROGS:
+ delegate_msk = &opts->delegate_progs;
+ enum_t = info.prog_t;
+ enum_pfx = "BPF_PROG_TYPE_";
+ break;
+ case OPT_DELEGATE_ATTACHS:
+ delegate_msk = &opts->delegate_attachs;
+ enum_t = info.attach_t;
+ enum_pfx = "BPF_";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ while ((p = strsep(&param->string, ":"))) {
+ if (strcmp(p, "any") == 0) {
+ msk |= ~0ULL;
+ } else if (find_btf_enum_const(info.btf, enum_t, enum_pfx, p, &val)) {
+ msk |= 1ULL << val;
+ } else {
+ err = kstrtou64(p, 0, &msk);
+ if (err)
+ return err;
+ }
+ }
+
+ /* Setting delegation mount options requires privileges */
+ if (msk && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ *delegate_msk |= msk;
+ break;
+ }
+ default:
+ /* ignore unknown mount options */
+ break;
}
return 0;
@@ -784,10 +1009,14 @@ out:
static int bpf_fill_super(struct super_block *sb, struct fs_context *fc)
{
static const struct tree_descr bpf_rfiles[] = { { "" } };
- struct bpf_mount_opts *opts = fc->fs_private;
+ struct bpf_mount_opts *opts = sb->s_fs_info;
struct inode *inode;
int ret;
+ /* Mounting an instance of BPF FS requires privileges */
+ if (fc->user_ns != &init_user_ns && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
ret = simple_fill_super(sb, BPF_FS_MAGIC, bpf_rfiles);
if (ret)
return ret;
@@ -811,7 +1040,7 @@ static int bpf_get_tree(struct fs_context *fc)
static void bpf_free_fc(struct fs_context *fc)
{
- kfree(fc->fs_private);
+ kfree(fc->s_fs_info);
}
static const struct fs_context_operations bpf_context_ops = {
@@ -835,17 +1064,32 @@ static int bpf_init_fs_context(struct fs_context *fc)
opts->uid = current_fsuid();
opts->gid = current_fsgid();
- fc->fs_private = opts;
+ /* start out with no BPF token delegation enabled */
+ opts->delegate_cmds = 0;
+ opts->delegate_maps = 0;
+ opts->delegate_progs = 0;
+ opts->delegate_attachs = 0;
+
+ fc->s_fs_info = opts;
fc->ops = &bpf_context_ops;
return 0;
}
+static void bpf_kill_super(struct super_block *sb)
+{
+ struct bpf_mount_opts *opts = sb->s_fs_info;
+
+ kill_litter_super(sb);
+ kfree(opts);
+}
+
static struct file_system_type bpf_fs_type = {
.owner = THIS_MODULE,
.name = "bpf",
.init_fs_context = bpf_init_fs_context,
.parameters = bpf_fs_parameters,
- .kill_sb = kill_litter_super,
+ .kill_sb = bpf_kill_super,
+ .fs_flags = FS_USERNS_MOUNT,
};
static int __init bpf_init(void)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index f8124b3229e2..b2750b79ac80 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1011,8 +1011,8 @@ int map_check_no_btf(const struct bpf_map *map,
return -ENOTSUPP;
}
-static int map_check_btf(struct bpf_map *map, const struct btf *btf,
- u32 btf_key_id, u32 btf_value_id)
+static int map_check_btf(struct bpf_map *map, struct bpf_token *token,
+ const struct btf *btf, u32 btf_key_id, u32 btf_value_id)
{
const struct btf_type *key_type, *value_type;
u32 key_size, value_size;
@@ -1040,7 +1040,7 @@ static int map_check_btf(struct bpf_map *map, const struct btf *btf,
if (!IS_ERR_OR_NULL(map->record)) {
int i;
- if (!bpf_capable()) {
+ if (!bpf_token_capable(token, CAP_BPF)) {
ret = -EPERM;
goto free_map_tab;
}
@@ -1123,14 +1123,21 @@ free_map_tab:
return ret;
}
-#define BPF_MAP_CREATE_LAST_FIELD value_type_btf_obj_fd
+static bool bpf_net_capable(void)
+{
+ return capable(CAP_NET_ADMIN) || capable(CAP_SYS_ADMIN);
+}
+
+#define BPF_MAP_CREATE_LAST_FIELD map_token_fd
/* called via syscall */
static int map_create(union bpf_attr *attr)
{
const struct bpf_map_ops *ops;
+ struct bpf_token *token = NULL;
int numa_node = bpf_map_attr_numa_node(attr);
u32 map_type = attr->map_type;
struct bpf_map *map;
+ bool token_flag;
int f_flags;
int err;
@@ -1138,6 +1145,12 @@ static int map_create(union bpf_attr *attr)
if (err)
return -EINVAL;
+ /* check BPF_F_TOKEN_FD flag, remember if it's set, and then clear it
+ * to avoid per-map type checks tripping on unknown flag
+ */
+ token_flag = attr->map_flags & BPF_F_TOKEN_FD;
+ attr->map_flags &= ~BPF_F_TOKEN_FD;
+
if (attr->btf_vmlinux_value_type_id) {
if (attr->map_type != BPF_MAP_TYPE_STRUCT_OPS ||
attr->btf_key_type_id || attr->btf_value_type_id)
@@ -1178,14 +1191,32 @@ static int map_create(union bpf_attr *attr)
if (!ops->map_mem_usage)
return -EINVAL;
+ if (token_flag) {
+ token = bpf_token_get_from_fd(attr->map_token_fd);
+ if (IS_ERR(token))
+ return PTR_ERR(token);
+
+ /* if current token doesn't grant map creation permissions,
+ * then we can't use this token, so ignore it and rely on
+ * system-wide capabilities checks
+ */
+ if (!bpf_token_allow_cmd(token, BPF_MAP_CREATE) ||
+ !bpf_token_allow_map_type(token, attr->map_type)) {
+ bpf_token_put(token);
+ token = NULL;
+ }
+ }
+
+ err = -EPERM;
+
/* Intent here is for unprivileged_bpf_disabled to block BPF map
* creation for unprivileged users; other actions depend
* on fd availability and access to bpffs, so are dependent on
* object creation success. Even with unprivileged BPF disabled,
* capability checks are still carried out.
*/
- if (sysctl_unprivileged_bpf_disabled && !bpf_capable())
- return -EPERM;
+ if (sysctl_unprivileged_bpf_disabled && !bpf_token_capable(token, CAP_BPF))
+ goto put_token;
/* check privileged map type permissions */
switch (map_type) {
@@ -1218,25 +1249,27 @@ static int map_create(union bpf_attr *attr)
case BPF_MAP_TYPE_LRU_PERCPU_HASH:
case BPF_MAP_TYPE_STRUCT_OPS:
case BPF_MAP_TYPE_CPUMAP:
- if (!bpf_capable())
- return -EPERM;
+ if (!bpf_token_capable(token, CAP_BPF))
+ goto put_token;
break;
case BPF_MAP_TYPE_SOCKMAP:
case BPF_MAP_TYPE_SOCKHASH:
case BPF_MAP_TYPE_DEVMAP:
case BPF_MAP_TYPE_DEVMAP_HASH:
case BPF_MAP_TYPE_XSKMAP:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
+ if (!bpf_token_capable(token, CAP_NET_ADMIN))
+ goto put_token;
break;
default:
WARN(1, "unsupported map type %d", map_type);
- return -EPERM;
+ goto put_token;
}
map = ops->map_alloc(attr);
- if (IS_ERR(map))
- return PTR_ERR(map);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
+ goto put_token;
+ }
map->ops = ops;
map->map_type = map_type;
@@ -1273,7 +1306,7 @@ static int map_create(union bpf_attr *attr)
map->btf = btf;
if (attr->btf_value_type_id) {
- err = map_check_btf(map, btf, attr->btf_key_type_id,
+ err = map_check_btf(map, token, btf, attr->btf_key_type_id,
attr->btf_value_type_id);
if (err)
goto free_map;
@@ -1285,15 +1318,16 @@ static int map_create(union bpf_attr *attr)
attr->btf_vmlinux_value_type_id;
}
- err = security_bpf_map_alloc(map);
+ err = security_bpf_map_create(map, attr, token);
if (err)
- goto free_map;
+ goto free_map_sec;
err = bpf_map_alloc_id(map);
if (err)
goto free_map_sec;
bpf_map_save_memcg(map);
+ bpf_token_put(token);
err = bpf_map_new_fd(map, f_flags);
if (err < 0) {
@@ -1314,6 +1348,8 @@ free_map_sec:
free_map:
btf_put(map->btf);
map->ops->map_free(map);
+put_token:
+ bpf_token_put(token);
return err;
}
@@ -2144,7 +2180,7 @@ static void __bpf_prog_put_rcu(struct rcu_head *rcu)
kvfree(aux->func_info);
kfree(aux->func_info_aux);
free_uid(aux->user);
- security_bpf_prog_free(aux);
+ security_bpf_prog_free(aux->prog);
bpf_prog_free(aux->prog);
}
@@ -2590,13 +2626,15 @@ static bool is_perfmon_prog_type(enum bpf_prog_type prog_type)
}
/* last field in 'union bpf_attr' used by this command */
-#define BPF_PROG_LOAD_LAST_FIELD log_true_size
+#define BPF_PROG_LOAD_LAST_FIELD prog_token_fd
static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
{
enum bpf_prog_type type = attr->prog_type;
struct bpf_prog *prog, *dst_prog = NULL;
struct btf *attach_btf = NULL;
+ struct bpf_token *token = NULL;
+ bool bpf_cap;
int err;
char license[128];
@@ -2610,13 +2648,35 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
BPF_F_TEST_RND_HI32 |
BPF_F_XDP_HAS_FRAGS |
BPF_F_XDP_DEV_BOUND_ONLY |
- BPF_F_TEST_REG_INVARIANTS))
+ BPF_F_TEST_REG_INVARIANTS |
+ BPF_F_TOKEN_FD))
return -EINVAL;
+ bpf_prog_load_fixup_attach_type(attr);
+
+ if (attr->prog_flags & BPF_F_TOKEN_FD) {
+ token = bpf_token_get_from_fd(attr->prog_token_fd);
+ if (IS_ERR(token))
+ return PTR_ERR(token);
+ /* if current token doesn't grant prog loading permissions,
+ * then we can't use this token, so ignore it and rely on
+ * system-wide capabilities checks
+ */
+ if (!bpf_token_allow_cmd(token, BPF_PROG_LOAD) ||
+ !bpf_token_allow_prog_type(token, attr->prog_type,
+ attr->expected_attach_type)) {
+ bpf_token_put(token);
+ token = NULL;
+ }
+ }
+
+ bpf_cap = bpf_token_capable(token, CAP_BPF);
+ err = -EPERM;
+
if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
(attr->prog_flags & BPF_F_ANY_ALIGNMENT) &&
- !bpf_capable())
- return -EPERM;
+ !bpf_cap)
+ goto put_token;
/* Intent here is for unprivileged_bpf_disabled to block BPF program
* creation for unprivileged users; other actions depend
@@ -2625,21 +2685,23 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
* capability checks are still carried out for these
* and other operations.
*/
- if (sysctl_unprivileged_bpf_disabled && !bpf_capable())
- return -EPERM;
+ if (sysctl_unprivileged_bpf_disabled && !bpf_cap)
+ goto put_token;
if (attr->insn_cnt == 0 ||
- attr->insn_cnt > (bpf_capable() ? BPF_COMPLEXITY_LIMIT_INSNS : BPF_MAXINSNS))
- return -E2BIG;
+ attr->insn_cnt > (bpf_cap ? BPF_COMPLEXITY_LIMIT_INSNS : BPF_MAXINSNS)) {
+ err = -E2BIG;
+ goto put_token;
+ }
if (type != BPF_PROG_TYPE_SOCKET_FILTER &&
type != BPF_PROG_TYPE_CGROUP_SKB &&
- !bpf_capable())
- return -EPERM;
+ !bpf_cap)
+ goto put_token;
- if (is_net_admin_prog_type(type) && !capable(CAP_NET_ADMIN) && !capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (is_perfmon_prog_type(type) && !perfmon_capable())
- return -EPERM;
+ if (is_net_admin_prog_type(type) && !bpf_token_capable(token, CAP_NET_ADMIN))
+ goto put_token;
+ if (is_perfmon_prog_type(type) && !bpf_token_capable(token, CAP_PERFMON))
+ goto put_token;
/* attach_prog_fd/attach_btf_obj_fd can specify fd of either bpf_prog
* or btf, we need to check which one it is
@@ -2649,27 +2711,33 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
if (IS_ERR(dst_prog)) {
dst_prog = NULL;
attach_btf = btf_get_by_fd(attr->attach_btf_obj_fd);
- if (IS_ERR(attach_btf))
- return -EINVAL;
+ if (IS_ERR(attach_btf)) {
+ err = -EINVAL;
+ goto put_token;
+ }
if (!btf_is_kernel(attach_btf)) {
/* attaching through specifying bpf_prog's BTF
* objects directly might be supported eventually
*/
btf_put(attach_btf);
- return -ENOTSUPP;
+ err = -ENOTSUPP;
+ goto put_token;
}
}
} else if (attr->attach_btf_id) {
/* fall back to vmlinux BTF, if BTF type ID is specified */
attach_btf = bpf_get_btf_vmlinux();
- if (IS_ERR(attach_btf))
- return PTR_ERR(attach_btf);
- if (!attach_btf)
- return -EINVAL;
+ if (IS_ERR(attach_btf)) {
+ err = PTR_ERR(attach_btf);
+ goto put_token;
+ }
+ if (!attach_btf) {
+ err = -EINVAL;
+ goto put_token;
+ }
btf_get(attach_btf);
}
- bpf_prog_load_fixup_attach_type(attr);
if (bpf_prog_load_check_attach(type, attr->expected_attach_type,
attach_btf, attr->attach_btf_id,
dst_prog)) {
@@ -2677,7 +2745,8 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
bpf_prog_put(dst_prog);
if (attach_btf)
btf_put(attach_btf);
- return -EINVAL;
+ err = -EINVAL;
+ goto put_token;
}
/* plain bpf_prog allocation */
@@ -2687,7 +2756,8 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
bpf_prog_put(dst_prog);
if (attach_btf)
btf_put(attach_btf);
- return -ENOMEM;
+ err = -EINVAL;
+ goto put_token;
}
prog->expected_attach_type = attr->expected_attach_type;
@@ -2698,9 +2768,9 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
prog->aux->sleepable = attr->prog_flags & BPF_F_SLEEPABLE;
prog->aux->xdp_has_frags = attr->prog_flags & BPF_F_XDP_HAS_FRAGS;
- err = security_bpf_prog_alloc(prog->aux);
- if (err)
- goto free_prog;
+ /* move token into prog->aux, reuse taken refcnt */
+ prog->aux->token = token;
+ token = NULL;
prog->aux->user = get_current_user();
prog->len = attr->insn_cnt;
@@ -2709,12 +2779,12 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
if (copy_from_bpfptr(prog->insns,
make_bpfptr(attr->insns, uattr.is_kernel),
bpf_prog_insn_size(prog)) != 0)
- goto free_prog_sec;
+ goto free_prog;
/* copy eBPF program license from user space */
if (strncpy_from_bpfptr(license,
make_bpfptr(attr->license, uattr.is_kernel),
sizeof(license) - 1) < 0)
- goto free_prog_sec;
+ goto free_prog;
license[sizeof(license) - 1] = 0;
/* eBPF programs must be GPL compatible to use GPL-ed functions */
@@ -2728,14 +2798,14 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
if (bpf_prog_is_dev_bound(prog->aux)) {
err = bpf_prog_dev_bound_init(prog, attr);
if (err)
- goto free_prog_sec;
+ goto free_prog;
}
if (type == BPF_PROG_TYPE_EXT && dst_prog &&
bpf_prog_is_dev_bound(dst_prog->aux)) {
err = bpf_prog_dev_bound_inherit(prog, dst_prog);
if (err)
- goto free_prog_sec;
+ goto free_prog;
}
/*
@@ -2757,12 +2827,16 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
/* find program type: socket_filter vs tracing_filter */
err = find_prog_type(type, prog);
if (err < 0)
- goto free_prog_sec;
+ goto free_prog;
prog->aux->load_time = ktime_get_boottime_ns();
err = bpf_obj_name_cpy(prog->aux->name, attr->prog_name,
sizeof(attr->prog_name));
if (err < 0)
+ goto free_prog;
+
+ err = security_bpf_prog_load(prog, attr, token);
+ if (err)
goto free_prog_sec;
/* run eBPF verifier */
@@ -2808,13 +2882,16 @@ free_used_maps:
*/
__bpf_prog_put_noref(prog, prog->aux->real_func_cnt);
return err;
+
free_prog_sec:
- free_uid(prog->aux->user);
- security_bpf_prog_free(prog->aux);
+ security_bpf_prog_free(prog);
free_prog:
+ free_uid(prog->aux->user);
if (prog->aux->attach_btf)
btf_put(prog->aux->attach_btf);
bpf_prog_free(prog);
+put_token:
+ bpf_token_put(token);
return err;
}
@@ -3822,7 +3899,7 @@ static int bpf_prog_attach_check_attach_type(const struct bpf_prog *prog,
case BPF_PROG_TYPE_SK_LOOKUP:
return attach_type == prog->expected_attach_type ? 0 : -EINVAL;
case BPF_PROG_TYPE_CGROUP_SKB:
- if (!capable(CAP_NET_ADMIN))
+ if (!bpf_token_capable(prog->aux->token, CAP_NET_ADMIN))
/* cg-skb progs can be loaded by unpriv user.
* check permissions at attach time.
*/
@@ -4025,7 +4102,7 @@ static int bpf_prog_detach(const union bpf_attr *attr)
static int bpf_prog_query(const union bpf_attr *attr,
union bpf_attr __user *uattr)
{
- if (!capable(CAP_NET_ADMIN))
+ if (!bpf_net_capable())
return -EPERM;
if (CHECK_ATTR(BPF_PROG_QUERY))
return -EINVAL;
@@ -4795,15 +4872,34 @@ static int bpf_obj_get_info_by_fd(const union bpf_attr *attr,
return err;
}
-#define BPF_BTF_LOAD_LAST_FIELD btf_log_true_size
+#define BPF_BTF_LOAD_LAST_FIELD btf_token_fd
static int bpf_btf_load(const union bpf_attr *attr, bpfptr_t uattr, __u32 uattr_size)
{
+ struct bpf_token *token = NULL;
+
if (CHECK_ATTR(BPF_BTF_LOAD))
return -EINVAL;
- if (!bpf_capable())
+ if (attr->btf_flags & ~BPF_F_TOKEN_FD)
+ return -EINVAL;
+
+ if (attr->btf_flags & BPF_F_TOKEN_FD) {
+ token = bpf_token_get_from_fd(attr->btf_token_fd);
+ if (IS_ERR(token))
+ return PTR_ERR(token);
+ if (!bpf_token_allow_cmd(token, BPF_BTF_LOAD)) {
+ bpf_token_put(token);
+ token = NULL;
+ }
+ }
+
+ if (!bpf_token_capable(token, CAP_BPF)) {
+ bpf_token_put(token);
return -EPERM;
+ }
+
+ bpf_token_put(token);
return btf_new_fd(attr, uattr, uattr_size);
}
@@ -5421,6 +5517,20 @@ out_prog_put:
return ret;
}
+#define BPF_TOKEN_CREATE_LAST_FIELD token_create.bpffs_fd
+
+static int token_create(union bpf_attr *attr)
+{
+ if (CHECK_ATTR(BPF_TOKEN_CREATE))
+ return -EINVAL;
+
+ /* no flags are supported yet */
+ if (attr->token_create.flags)
+ return -EINVAL;
+
+ return bpf_token_create(attr);
+}
+
static int __sys_bpf(int cmd, bpfptr_t uattr, unsigned int size)
{
union bpf_attr attr;
@@ -5554,6 +5664,9 @@ static int __sys_bpf(int cmd, bpfptr_t uattr, unsigned int size)
case BPF_PROG_BIND_MAP:
err = bpf_prog_bind_map(&attr);
break;
+ case BPF_TOKEN_CREATE:
+ err = token_create(&attr);
+ break;
default:
err = -EINVAL;
break;
@@ -5660,7 +5773,7 @@ static const struct bpf_func_proto bpf_sys_bpf_proto = {
const struct bpf_func_proto * __weak
tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
- return bpf_base_func_proto(func_id);
+ return bpf_base_func_proto(func_id, prog);
}
BPF_CALL_1(bpf_sys_close, u32, fd)
@@ -5710,7 +5823,8 @@ syscall_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
switch (func_id) {
case BPF_FUNC_sys_bpf:
- return !perfmon_capable() ? NULL : &bpf_sys_bpf_proto;
+ return !bpf_token_capable(prog->aux->token, CAP_PERFMON)
+ ? NULL : &bpf_sys_bpf_proto;
case BPF_FUNC_btf_find_by_name_kind:
return &bpf_btf_find_by_name_kind_proto;
case BPF_FUNC_sys_close:
diff --git a/kernel/bpf/token.c b/kernel/bpf/token.c
new file mode 100644
index 000000000000..0bca93b60c43
--- /dev/null
+++ b/kernel/bpf/token.c
@@ -0,0 +1,278 @@
+#include <linux/bpf.h>
+#include <linux/vmalloc.h>
+#include <linux/fdtable.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/idr.h>
+#include <linux/namei.h>
+#include <linux/user_namespace.h>
+#include <linux/security.h>
+
+static bool bpf_ns_capable(struct user_namespace *ns, int cap)
+{
+ return ns_capable(ns, cap) || (cap != CAP_SYS_ADMIN && ns_capable(ns, CAP_SYS_ADMIN));
+}
+
+bool bpf_token_capable(const struct bpf_token *token, int cap)
+{
+ struct user_namespace *userns;
+
+ /* BPF token allows ns_capable() level of capabilities */
+ userns = token ? token->userns : &init_user_ns;
+ if (!bpf_ns_capable(userns, cap))
+ return false;
+ if (token && security_bpf_token_capable(token, cap) < 0)
+ return false;
+ return true;
+}
+
+void bpf_token_inc(struct bpf_token *token)
+{
+ atomic64_inc(&token->refcnt);
+}
+
+static void bpf_token_free(struct bpf_token *token)
+{
+ security_bpf_token_free(token);
+ put_user_ns(token->userns);
+ kfree(token);
+}
+
+static void bpf_token_put_deferred(struct work_struct *work)
+{
+ struct bpf_token *token = container_of(work, struct bpf_token, work);
+
+ bpf_token_free(token);
+}
+
+void bpf_token_put(struct bpf_token *token)
+{
+ if (!token)
+ return;
+
+ if (!atomic64_dec_and_test(&token->refcnt))
+ return;
+
+ INIT_WORK(&token->work, bpf_token_put_deferred);
+ schedule_work(&token->work);
+}
+
+static int bpf_token_release(struct inode *inode, struct file *filp)
+{
+ struct bpf_token *token = filp->private_data;
+
+ bpf_token_put(token);
+ return 0;
+}
+
+static void bpf_token_show_fdinfo(struct seq_file *m, struct file *filp)
+{
+ struct bpf_token *token = filp->private_data;
+ u64 mask;
+
+ BUILD_BUG_ON(__MAX_BPF_CMD >= 64);
+ mask = (1ULL << __MAX_BPF_CMD) - 1;
+ if ((token->allowed_cmds & mask) == mask)
+ seq_printf(m, "allowed_cmds:\tany\n");
+ else
+ seq_printf(m, "allowed_cmds:\t0x%llx\n", token->allowed_cmds);
+
+ BUILD_BUG_ON(__MAX_BPF_MAP_TYPE >= 64);
+ mask = (1ULL << __MAX_BPF_MAP_TYPE) - 1;
+ if ((token->allowed_maps & mask) == mask)
+ seq_printf(m, "allowed_maps:\tany\n");
+ else
+ seq_printf(m, "allowed_maps:\t0x%llx\n", token->allowed_maps);
+
+ BUILD_BUG_ON(__MAX_BPF_PROG_TYPE >= 64);
+ mask = (1ULL << __MAX_BPF_PROG_TYPE) - 1;
+ if ((token->allowed_progs & mask) == mask)
+ seq_printf(m, "allowed_progs:\tany\n");
+ else
+ seq_printf(m, "allowed_progs:\t0x%llx\n", token->allowed_progs);
+
+ BUILD_BUG_ON(__MAX_BPF_ATTACH_TYPE >= 64);
+ mask = (1ULL << __MAX_BPF_ATTACH_TYPE) - 1;
+ if ((token->allowed_attachs & mask) == mask)
+ seq_printf(m, "allowed_attachs:\tany\n");
+ else
+ seq_printf(m, "allowed_attachs:\t0x%llx\n", token->allowed_attachs);
+}
+
+#define BPF_TOKEN_INODE_NAME "bpf-token"
+
+static const struct inode_operations bpf_token_iops = { };
+
+static const struct file_operations bpf_token_fops = {
+ .release = bpf_token_release,
+ .show_fdinfo = bpf_token_show_fdinfo,
+};
+
+int bpf_token_create(union bpf_attr *attr)
+{
+ struct bpf_mount_opts *mnt_opts;
+ struct bpf_token *token = NULL;
+ struct user_namespace *userns;
+ struct inode *inode;
+ struct file *file;
+ struct path path;
+ struct fd f;
+ umode_t mode;
+ int err, fd;
+
+ f = fdget(attr->token_create.bpffs_fd);
+ if (!f.file)
+ return -EBADF;
+
+ path = f.file->f_path;
+ path_get(&path);
+ fdput(f);
+
+ if (path.dentry != path.mnt->mnt_sb->s_root) {
+ err = -EINVAL;
+ goto out_path;
+ }
+ if (path.mnt->mnt_sb->s_op != &bpf_super_ops) {
+ err = -EINVAL;
+ goto out_path;
+ }
+ err = path_permission(&path, MAY_ACCESS);
+ if (err)
+ goto out_path;
+
+ userns = path.dentry->d_sb->s_user_ns;
+ /*
+ * Enforce that creators of BPF tokens are in the same user
+ * namespace as the BPF FS instance. This makes reasoning about
+ * permissions a lot easier and we can always relax this later.
+ */
+ if (current_user_ns() != userns) {
+ err = -EPERM;
+ goto out_path;
+ }
+ if (!ns_capable(userns, CAP_BPF)) {
+ err = -EPERM;
+ goto out_path;
+ }
+
+ /* Creating BPF token in init_user_ns doesn't make much sense. */
+ if (current_user_ns() == &init_user_ns) {
+ err = -EOPNOTSUPP;
+ goto out_path;
+ }
+
+ mnt_opts = path.dentry->d_sb->s_fs_info;
+ if (mnt_opts->delegate_cmds == 0 &&
+ mnt_opts->delegate_maps == 0 &&
+ mnt_opts->delegate_progs == 0 &&
+ mnt_opts->delegate_attachs == 0) {
+ err = -ENOENT; /* no BPF token delegation is set up */
+ goto out_path;
+ }
+
+ mode = S_IFREG | ((S_IRUSR | S_IWUSR) & ~current_umask());
+ inode = bpf_get_inode(path.mnt->mnt_sb, NULL, mode);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out_path;
+ }
+
+ inode->i_op = &bpf_token_iops;
+ inode->i_fop = &bpf_token_fops;
+ clear_nlink(inode); /* make sure it is unlinked */
+
+ file = alloc_file_pseudo(inode, path.mnt, BPF_TOKEN_INODE_NAME, O_RDWR, &bpf_token_fops);
+ if (IS_ERR(file)) {
+ iput(inode);
+ err = PTR_ERR(file);
+ goto out_path;
+ }
+
+ token = kzalloc(sizeof(*token), GFP_USER);
+ if (!token) {
+ err = -ENOMEM;
+ goto out_file;
+ }
+
+ atomic64_set(&token->refcnt, 1);
+
+ /* remember bpffs owning userns for future ns_capable() checks */
+ token->userns = get_user_ns(userns);
+
+ token->allowed_cmds = mnt_opts->delegate_cmds;
+ token->allowed_maps = mnt_opts->delegate_maps;
+ token->allowed_progs = mnt_opts->delegate_progs;
+ token->allowed_attachs = mnt_opts->delegate_attachs;
+
+ err = security_bpf_token_create(token, attr, &path);
+ if (err)
+ goto out_token;
+
+ fd = get_unused_fd_flags(O_CLOEXEC);
+ if (fd < 0) {
+ err = fd;
+ goto out_token;
+ }
+
+ file->private_data = token;
+ fd_install(fd, file);
+
+ path_put(&path);
+ return fd;
+
+out_token:
+ bpf_token_free(token);
+out_file:
+ fput(file);
+out_path:
+ path_put(&path);
+ return err;
+}
+
+struct bpf_token *bpf_token_get_from_fd(u32 ufd)
+{
+ struct fd f = fdget(ufd);
+ struct bpf_token *token;
+
+ if (!f.file)
+ return ERR_PTR(-EBADF);
+ if (f.file->f_op != &bpf_token_fops) {
+ fdput(f);
+ return ERR_PTR(-EINVAL);
+ }
+
+ token = f.file->private_data;
+ bpf_token_inc(token);
+ fdput(f);
+
+ return token;
+}
+
+bool bpf_token_allow_cmd(const struct bpf_token *token, enum bpf_cmd cmd)
+{
+ if (!token)
+ return false;
+ if (!(token->allowed_cmds & (1ULL << cmd)))
+ return false;
+ return security_bpf_token_cmd(token, cmd) == 0;
+}
+
+bool bpf_token_allow_map_type(const struct bpf_token *token, enum bpf_map_type type)
+{
+ if (!token || type >= __MAX_BPF_MAP_TYPE)
+ return false;
+
+ return token->allowed_maps & (1ULL << type);
+}
+
+bool bpf_token_allow_prog_type(const struct bpf_token *token,
+ enum bpf_prog_type prog_type,
+ enum bpf_attach_type attach_type)
+{
+ if (!token || prog_type >= __MAX_BPF_PROG_TYPE || attach_type >= __MAX_BPF_ATTACH_TYPE)
+ return false;
+
+ return (token->allowed_progs & (1ULL << prog_type)) &&
+ (token->allowed_attachs & (1ULL << attach_type));
+}
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index f31868ba0c2d..fe833e831cb6 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -20830,7 +20830,12 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, bpfptr_t uattr, __u3
env->prog = *prog;
env->ops = bpf_verifier_ops[env->prog->type];
env->fd_array = make_bpfptr(attr->fd_array, uattr.is_kernel);
- is_priv = bpf_capable();
+
+ env->allow_ptr_leaks = bpf_allow_ptr_leaks(env->prog->aux->token);
+ env->allow_uninit_stack = bpf_allow_uninit_stack(env->prog->aux->token);
+ env->bypass_spec_v1 = bpf_bypass_spec_v1(env->prog->aux->token);
+ env->bypass_spec_v4 = bpf_bypass_spec_v4(env->prog->aux->token);
+ env->bpf_capable = is_priv = bpf_token_capable(env->prog->aux->token, CAP_BPF);
bpf_get_btf_vmlinux();
@@ -20862,12 +20867,6 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, bpfptr_t uattr, __u3
if (attr->prog_flags & BPF_F_ANY_ALIGNMENT)
env->strict_alignment = false;
- env->allow_ptr_leaks = bpf_allow_ptr_leaks();
- env->allow_uninit_stack = bpf_allow_uninit_stack();
- env->bypass_spec_v1 = bpf_bypass_spec_v1();
- env->bypass_spec_v4 = bpf_bypass_spec_v4();
- env->bpf_capable = bpf_capable();
-
if (is_priv)
env->test_state_freq = attr->prog_flags & BPF_F_TEST_STATE_FREQ;
env->test_reg_invariants = attr->prog_flags & BPF_F_TEST_REG_INVARIANTS;
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index c98c20abaf99..64fdaf79d113 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1629,7 +1629,7 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_trace_vprintk:
return bpf_get_trace_vprintk_proto();
default:
- return bpf_base_func_proto(func_id);
+ return bpf_base_func_proto(func_id, prog);
}
}
generated by cgit (git 2.34.1) at 2025-12-09 10:40:30 +0000