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authorJakub Kicinski <kuba@kernel.org>2022-02-17 17:23:51 -0800
committerJakub Kicinski <kuba@kernel.org>2022-02-17 17:23:52 -0800
commita3fc4b1d09d99cdb6a7dbba5a753db15a10b2e9c (patch)
tree82fc098c26e96311b451388c91a1910d9f4b1bf2 /kernel
parent2aed49da6c080cbb8e35a39886f513ff97e954b4 (diff)
parentd24d2a2b0a81dd5e9bb99aeb4559ec9734e1416f (diff)
Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says: ==================== bpf-next 2022-02-17 We've added 29 non-merge commits during the last 8 day(s) which contain a total of 34 files changed, 1502 insertions(+), 524 deletions(-). The main changes are: 1) Add BTFGen support to bpftool which allows to use CO-RE in kernels without BTF info, from Mauricio Vásquez, Rafael David Tinoco, Lorenzo Fontana and Leonardo Di Donato. (Details: https://lpc.events/event/11/contributions/948/) 2) Prepare light skeleton to be used in both kernel module and user space and convert bpf_preload.ko to use light skeleton, from Alexei Starovoitov. 3) Rework bpftool's versioning scheme and align with libbpf's version number; also add linked libbpf version info to "bpftool version", from Quentin Monnet. 4) Add minimal C++ specific additions to bpftool's skeleton codegen to facilitate use of C skeletons in C++ applications, from Andrii Nakryiko. 5) Add BPF verifier sanity check whether relative offset on kfunc calls overflows desc->imm and reject the BPF program if the case, from Hou Tao. 6) Fix libbpf to use a dynamically allocated buffer for netlink messages to avoid receiving truncated messages on some archs, from Toke Høiland-Jørgensen. 7) Various follow-up fixes to the JIT bpf_prog_pack allocator, from Song Liu. 8) Various BPF selftest and vmtest.sh fixes, from Yucong Sun. 9) Fix bpftool pretty print handling on dumping map keys/values when no BTF is available, from Jiri Olsa and Yinjun Zhang. 10) Extend XDP frags selftest to check for invalid length, from Lorenzo Bianconi. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (29 commits) bpf: bpf_prog_pack: Set proper size before freeing ro_header selftests/bpf: Fix crash in core_reloc when bpftool btfgen fails selftests/bpf: Fix vmtest.sh to launch smp vm. libbpf: Fix memleak in libbpf_netlink_recv() bpftool: Fix C++ additions to skeleton bpftool: Fix pretty print dump for maps without BTF loaded selftests/bpf: Test "bpftool gen min_core_btf" bpftool: Gen min_core_btf explanation and examples bpftool: Implement btfgen_get_btf() bpftool: Implement "gen min_core_btf" logic bpftool: Add gen min_core_btf command libbpf: Expose bpf_core_{add,free}_cands() to bpftool libbpf: Split bpf_core_apply_relo() bpf: Reject kfunc calls that overflow insn->imm selftests/bpf: Add Skeleton templated wrapper as an example bpftool: Add C++-specific open/load/etc skeleton wrappers selftests/bpf: Fix GCC11 compiler warnings in -O2 mode bpftool: Fix the error when lookup in no-btf maps libbpf: Use dynamically allocated buffer when receiving netlink messages libbpf: Fix libbpf.map inheritance chain for LIBBPF_0.7.0 ... ==================== Link: https://lore.kernel.org/r/20220217232027.29831-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/bpf/btf.c13
-rw-r--r--kernel/bpf/core.c5
-rw-r--r--kernel/bpf/inode.c39
-rw-r--r--kernel/bpf/preload/Kconfig7
-rw-r--r--kernel/bpf/preload/Makefile14
-rw-r--r--kernel/bpf/preload/bpf_preload.h8
-rw-r--r--kernel/bpf/preload/bpf_preload_kern.c119
-rw-r--r--kernel/bpf/preload/bpf_preload_umd_blob.S7
-rw-r--r--kernel/bpf/preload/iterators/bpf_preload_common.h13
-rw-r--r--kernel/bpf/preload/iterators/iterators.c108
-rw-r--r--kernel/bpf/preload/iterators/iterators.lskel.h141
-rw-r--r--kernel/bpf/syscall.c40
-rw-r--r--kernel/bpf/verifier.c11
13 files changed, 196 insertions, 329 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 6f094c9f7f0b..02d7014417a0 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -7226,6 +7226,7 @@ int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
{
bool need_cands = relo->kind != BPF_CORE_TYPE_ID_LOCAL;
struct bpf_core_cand_list cands = {};
+ struct bpf_core_relo_res targ_res;
struct bpf_core_spec *specs;
int err;
@@ -7265,13 +7266,19 @@ int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
cands.len = cc->cnt;
/* cand_cache_mutex needs to span the cache lookup and
* copy of btf pointer into bpf_core_cand_list,
- * since module can be unloaded while bpf_core_apply_relo_insn
+ * since module can be unloaded while bpf_core_calc_relo_insn
* is working with module's btf.
*/
}
- err = bpf_core_apply_relo_insn((void *)ctx->log, insn, relo->insn_off / 8,
- relo, relo_idx, ctx->btf, &cands, specs);
+ err = bpf_core_calc_relo_insn((void *)ctx->log, relo, relo_idx, ctx->btf, &cands, specs,
+ &targ_res);
+ if (err)
+ goto out;
+
+ err = bpf_core_patch_insn((void *)ctx->log, insn, relo->insn_off / 8, relo, relo_idx,
+ &targ_res);
+
out:
kfree(specs);
if (need_cands) {
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 42d96549a804..ebb0193d07f0 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -827,7 +827,7 @@ int bpf_jit_add_poke_descriptor(struct bpf_prog *prog,
struct bpf_prog_pack {
struct list_head list;
void *ptr;
- unsigned long bitmap[BITS_TO_LONGS(BPF_PROG_CHUNK_COUNT)];
+ unsigned long bitmap[];
};
#define BPF_PROG_MAX_PACK_PROG_SIZE BPF_PROG_PACK_SIZE
@@ -840,7 +840,7 @@ static struct bpf_prog_pack *alloc_new_pack(void)
{
struct bpf_prog_pack *pack;
- pack = kzalloc(sizeof(*pack), GFP_KERNEL);
+ pack = kzalloc(sizeof(*pack) + BITS_TO_BYTES(BPF_PROG_CHUNK_COUNT), GFP_KERNEL);
if (!pack)
return NULL;
pack->ptr = module_alloc(BPF_PROG_PACK_SIZE);
@@ -1069,6 +1069,7 @@ bpf_jit_binary_pack_alloc(unsigned int proglen, u8 **image_ptr,
*rw_header = kvmalloc(size, GFP_KERNEL);
if (!*rw_header) {
+ bpf_arch_text_copy(&ro_header->size, &size, sizeof(size));
bpf_prog_pack_free(ro_header);
bpf_jit_uncharge_modmem(size);
return NULL;
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index 5a8d9f7467bf..4f841e16779e 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -710,11 +710,10 @@ static DEFINE_MUTEX(bpf_preload_lock);
static int populate_bpffs(struct dentry *parent)
{
struct bpf_preload_info objs[BPF_PRELOAD_LINKS] = {};
- struct bpf_link *links[BPF_PRELOAD_LINKS] = {};
int err = 0, i;
/* grab the mutex to make sure the kernel interactions with bpf_preload
- * UMD are serialized
+ * are serialized
*/
mutex_lock(&bpf_preload_lock);
@@ -722,40 +721,22 @@ static int populate_bpffs(struct dentry *parent)
if (!bpf_preload_mod_get())
goto out;
- if (!bpf_preload_ops->info.tgid) {
- /* preload() will start UMD that will load BPF iterator programs */
- err = bpf_preload_ops->preload(objs);
- if (err)
+ err = bpf_preload_ops->preload(objs);
+ if (err)
+ goto out_put;
+ for (i = 0; i < BPF_PRELOAD_LINKS; i++) {
+ bpf_link_inc(objs[i].link);
+ err = bpf_iter_link_pin_kernel(parent,
+ objs[i].link_name, objs[i].link);
+ if (err) {
+ bpf_link_put(objs[i].link);
goto out_put;
- for (i = 0; i < BPF_PRELOAD_LINKS; i++) {
- links[i] = bpf_link_by_id(objs[i].link_id);
- if (IS_ERR(links[i])) {
- err = PTR_ERR(links[i]);
- goto out_put;
- }
}
- for (i = 0; i < BPF_PRELOAD_LINKS; i++) {
- err = bpf_iter_link_pin_kernel(parent,
- objs[i].link_name, links[i]);
- if (err)
- goto out_put;
- /* do not unlink successfully pinned links even
- * if later link fails to pin
- */
- links[i] = NULL;
- }
- /* finish() will tell UMD process to exit */
- err = bpf_preload_ops->finish();
- if (err)
- goto out_put;
}
out_put:
bpf_preload_mod_put();
out:
mutex_unlock(&bpf_preload_lock);
- for (i = 0; i < BPF_PRELOAD_LINKS && err; i++)
- if (!IS_ERR_OR_NULL(links[i]))
- bpf_link_put(links[i]);
return err;
}
diff --git a/kernel/bpf/preload/Kconfig b/kernel/bpf/preload/Kconfig
index 26bced262473..c9d45c9d6918 100644
--- a/kernel/bpf/preload/Kconfig
+++ b/kernel/bpf/preload/Kconfig
@@ -18,10 +18,9 @@ menuconfig BPF_PRELOAD
if BPF_PRELOAD
config BPF_PRELOAD_UMD
- tristate "bpf_preload kernel module with user mode driver"
- depends on CC_CAN_LINK
- depends on m || CC_CAN_LINK_STATIC
+ tristate "bpf_preload kernel module"
default m
help
- This builds bpf_preload kernel module with embedded user mode driver.
+ This builds bpf_preload kernel module with embedded BPF programs for
+ introspection in bpffs.
endif
diff --git a/kernel/bpf/preload/Makefile b/kernel/bpf/preload/Makefile
index baf47d9c7557..167534e3b0b4 100644
--- a/kernel/bpf/preload/Makefile
+++ b/kernel/bpf/preload/Makefile
@@ -3,16 +3,6 @@
LIBBPF_SRCS = $(srctree)/tools/lib/bpf/
LIBBPF_INCLUDE = $(LIBBPF_SRCS)/..
-userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
- -I $(LIBBPF_INCLUDE) -Wno-unused-result
-
-userprogs := bpf_preload_umd
-
-bpf_preload_umd-objs := iterators/iterators.o
-
-$(obj)/bpf_preload_umd:
-
-$(obj)/bpf_preload_umd_blob.o: $(obj)/bpf_preload_umd
-
obj-$(CONFIG_BPF_PRELOAD_UMD) += bpf_preload.o
-bpf_preload-objs += bpf_preload_kern.o bpf_preload_umd_blob.o
+CFLAGS_bpf_preload_kern.o += -I $(LIBBPF_INCLUDE)
+bpf_preload-objs += bpf_preload_kern.o
diff --git a/kernel/bpf/preload/bpf_preload.h b/kernel/bpf/preload/bpf_preload.h
index 2f9932276f2e..f065c91213a0 100644
--- a/kernel/bpf/preload/bpf_preload.h
+++ b/kernel/bpf/preload/bpf_preload.h
@@ -2,13 +2,13 @@
#ifndef _BPF_PRELOAD_H
#define _BPF_PRELOAD_H
-#include <linux/usermode_driver.h>
-#include "iterators/bpf_preload_common.h"
+struct bpf_preload_info {
+ char link_name[16];
+ struct bpf_link *link;
+};
struct bpf_preload_ops {
- struct umd_info info;
int (*preload)(struct bpf_preload_info *);
- int (*finish)(void);
struct module *owner;
};
extern struct bpf_preload_ops *bpf_preload_ops;
diff --git a/kernel/bpf/preload/bpf_preload_kern.c b/kernel/bpf/preload/bpf_preload_kern.c
index 53736e52c1df..30207c048d36 100644
--- a/kernel/bpf/preload/bpf_preload_kern.c
+++ b/kernel/bpf/preload/bpf_preload_kern.c
@@ -2,101 +2,80 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/pid.h>
-#include <linux/fs.h>
-#include <linux/sched/signal.h>
#include "bpf_preload.h"
+#include "iterators/iterators.lskel.h"
-extern char bpf_preload_umd_start;
-extern char bpf_preload_umd_end;
+static struct bpf_link *maps_link, *progs_link;
+static struct iterators_bpf *skel;
-static int preload(struct bpf_preload_info *obj);
-static int finish(void);
+static void free_links_and_skel(void)
+{
+ if (!IS_ERR_OR_NULL(maps_link))
+ bpf_link_put(maps_link);
+ if (!IS_ERR_OR_NULL(progs_link))
+ bpf_link_put(progs_link);
+ iterators_bpf__destroy(skel);
+}
+
+static int preload(struct bpf_preload_info *obj)
+{
+ strlcpy(obj[0].link_name, "maps.debug", sizeof(obj[0].link_name));
+ obj[0].link = maps_link;
+ strlcpy(obj[1].link_name, "progs.debug", sizeof(obj[1].link_name));
+ obj[1].link = progs_link;
+ return 0;
+}
-static struct bpf_preload_ops umd_ops = {
- .info.driver_name = "bpf_preload",
+static struct bpf_preload_ops ops = {
.preload = preload,
- .finish = finish,
.owner = THIS_MODULE,
};
-static int preload(struct bpf_preload_info *obj)
+static int load_skel(void)
{
- int magic = BPF_PRELOAD_START;
- loff_t pos = 0;
- int i, err;
- ssize_t n;
+ int err;
- err = fork_usermode_driver(&umd_ops.info);
+ skel = iterators_bpf__open();
+ if (!skel)
+ return -ENOMEM;
+ err = iterators_bpf__load(skel);
if (err)
- return err;
-
- /* send the start magic to let UMD proceed with loading BPF progs */
- n = kernel_write(umd_ops.info.pipe_to_umh,
- &magic, sizeof(magic), &pos);
- if (n != sizeof(magic))
- return -EPIPE;
-
- /* receive bpf_link IDs and names from UMD */
- pos = 0;
- for (i = 0; i < BPF_PRELOAD_LINKS; i++) {
- n = kernel_read(umd_ops.info.pipe_from_umh,
- &obj[i], sizeof(*obj), &pos);
- if (n != sizeof(*obj))
- return -EPIPE;
+ goto out;
+ err = iterators_bpf__attach(skel);
+ if (err)
+ goto out;
+ maps_link = bpf_link_get_from_fd(skel->links.dump_bpf_map_fd);
+ if (IS_ERR(maps_link)) {
+ err = PTR_ERR(maps_link);
+ goto out;
}
- return 0;
-}
-
-static int finish(void)
-{
- int magic = BPF_PRELOAD_END;
- struct pid *tgid;
- loff_t pos = 0;
- ssize_t n;
-
- /* send the last magic to UMD. It will do a normal exit. */
- n = kernel_write(umd_ops.info.pipe_to_umh,
- &magic, sizeof(magic), &pos);
- if (n != sizeof(magic))
- return -EPIPE;
-
- tgid = umd_ops.info.tgid;
- if (tgid) {
- wait_event(tgid->wait_pidfd, thread_group_exited(tgid));
- umd_cleanup_helper(&umd_ops.info);
+ progs_link = bpf_link_get_from_fd(skel->links.dump_bpf_prog_fd);
+ if (IS_ERR(progs_link)) {
+ err = PTR_ERR(progs_link);
+ goto out;
}
return 0;
+out:
+ free_links_and_skel();
+ return err;
}
-static int __init load_umd(void)
+static int __init load(void)
{
int err;
- err = umd_load_blob(&umd_ops.info, &bpf_preload_umd_start,
- &bpf_preload_umd_end - &bpf_preload_umd_start);
+ err = load_skel();
if (err)
return err;
- bpf_preload_ops = &umd_ops;
+ bpf_preload_ops = &ops;
return err;
}
-static void __exit fini_umd(void)
+static void __exit fini(void)
{
- struct pid *tgid;
-
bpf_preload_ops = NULL;
-
- /* kill UMD in case it's still there due to earlier error */
- tgid = umd_ops.info.tgid;
- if (tgid) {
- kill_pid(tgid, SIGKILL, 1);
-
- wait_event(tgid->wait_pidfd, thread_group_exited(tgid));
- umd_cleanup_helper(&umd_ops.info);
- }
- umd_unload_blob(&umd_ops.info);
+ free_links_and_skel();
}
-late_initcall(load_umd);
-module_exit(fini_umd);
+late_initcall(load);
+module_exit(fini);
MODULE_LICENSE("GPL");
diff --git a/kernel/bpf/preload/bpf_preload_umd_blob.S b/kernel/bpf/preload/bpf_preload_umd_blob.S
deleted file mode 100644
index f1f40223b5c3..000000000000
--- a/kernel/bpf/preload/bpf_preload_umd_blob.S
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
- .section .init.rodata, "a"
- .global bpf_preload_umd_start
-bpf_preload_umd_start:
- .incbin "kernel/bpf/preload/bpf_preload_umd"
- .global bpf_preload_umd_end
-bpf_preload_umd_end:
diff --git a/kernel/bpf/preload/iterators/bpf_preload_common.h b/kernel/bpf/preload/iterators/bpf_preload_common.h
deleted file mode 100644
index 8464d1a48c05..000000000000
--- a/kernel/bpf/preload/iterators/bpf_preload_common.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _BPF_PRELOAD_COMMON_H
-#define _BPF_PRELOAD_COMMON_H
-
-#define BPF_PRELOAD_START 0x5555
-#define BPF_PRELOAD_END 0xAAAA
-
-struct bpf_preload_info {
- char link_name[16];
- int link_id;
-};
-
-#endif
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c
deleted file mode 100644
index 4dafe0f4f2b2..000000000000
--- a/kernel/bpf/preload/iterators/iterators.c
+++ /dev/null
@@ -1,108 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (c) 2020 Facebook */
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/resource.h>
-#include <bpf/libbpf.h>
-#include <bpf/bpf.h>
-#include <sys/mount.h>
-#include "iterators.lskel.h"
-#include "bpf_preload_common.h"
-
-int to_kernel = -1;
-int from_kernel = 0;
-
-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(link_fd, &info, &info_len);
- if (err)
- return err;
- obj.link_id = info.id;
- if (strlen(link_name) >= sizeof(obj.link_name))
- return -E2BIG;
- strcpy(obj.link_name, link_name);
- if (write(to_kernel, &obj, sizeof(obj)) != sizeof(obj))
- return -EPIPE;
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- struct iterators_bpf *skel;
- int err, magic;
- int debug_fd;
-
- debug_fd = open("/dev/console", O_WRONLY | O_NOCTTY | O_CLOEXEC);
- if (debug_fd < 0)
- return 1;
- to_kernel = dup(1);
- close(1);
- dup(debug_fd);
- /* now stdin and stderr point to /dev/console */
-
- read(from_kernel, &magic, sizeof(magic));
- if (magic != BPF_PRELOAD_START) {
- printf("bad start magic %d\n", magic);
- return 1;
- }
- /* libbpf opens BPF object and loads it into the kernel */
- skel = iterators_bpf__open_and_load();
- if (!skel) {
- /* iterators.skel.h is little endian.
- * libbpf doesn't support automatic little->big conversion
- * of BPF bytecode yet.
- * The program load will fail in such case.
- */
- printf("Failed load could be due to wrong endianness\n");
- return 1;
- }
- err = iterators_bpf__attach(skel);
- if (err)
- goto cleanup;
-
- /* send two bpf_link IDs with names to the kernel */
- 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_fd, "progs.debug");
- if (err)
- goto cleanup;
-
- /* The kernel will proceed with pinnging the links in bpffs.
- * UMD will wait on read from pipe.
- */
- read(from_kernel, &magic, sizeof(magic));
- if (magic != BPF_PRELOAD_END) {
- printf("bad final magic %d\n", magic);
- err = -EINVAL;
- }
-cleanup:
- iterators_bpf__destroy(skel);
-
- return err != 0;
-}
diff --git a/kernel/bpf/preload/iterators/iterators.lskel.h b/kernel/bpf/preload/iterators/iterators.lskel.h
index d90562d672d2..70f236a82fe1 100644
--- a/kernel/bpf/preload/iterators/iterators.lskel.h
+++ b/kernel/bpf/preload/iterators/iterators.lskel.h
@@ -3,8 +3,6 @@
#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 {
@@ -70,31 +68,28 @@ iterators_bpf__destroy(struct iterators_bpf *skel)
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_free_map_data(skel->rodata, skel->maps.rodata.initial_value, 4096);
skel_closenz(skel->maps.rodata.map_fd);
- free(skel);
+ skel_free(skel);
}
static inline struct iterators_bpf *
iterators_bpf__open(void)
{
struct iterators_bpf *skel;
- skel = calloc(sizeof(*skel), 1);
+ skel = skel_alloc(sizeof(*skel));
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 *)"\
+ skel->rodata = skel_prep_map_data((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;
+\x64\x0a\0\x25\x34\x75\x20\x25\x2d\x31\x36\x73\x20\x25\x73\x20\x25\x73\x0a\0", 4096, 98);
+ if (!skel->rodata)
+ goto cleanup;
+ skel->maps.rodata.initial_value = (__u64) (long) skel->rodata;
return skel;
cleanup:
iterators_bpf__destroy(skel);
@@ -326,7 +321,7 @@ iterators_bpf__load(struct iterators_bpf *skel)
\0\0\x01\0\0\0\0\0\0\0\x13\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x10\0\0\0\0\0\
\0\0\x62\x70\x66\x5f\x69\x74\x65\x72\x5f\x62\x70\x66\x5f\x70\x72\x6f\x67\0\0\0\
\0\0\0\0";
- opts.insns_sz = 2184;
+ opts.insns_sz = 2216;
opts.insns = (void *)"\
\xbf\x16\0\0\0\0\0\0\xbf\xa1\0\0\0\0\0\0\x07\x01\0\0\x78\xff\xff\xff\xb7\x02\0\
\0\x88\0\0\0\xb7\x03\0\0\0\0\0\0\x85\0\0\0\x71\0\0\0\x05\0\x14\0\0\0\0\0\x61\
@@ -343,70 +338,72 @@ iterators_bpf__load(struct iterators_bpf *skel)
\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\x30\x0e\0\0\xb7\x03\0\0\x1c\0\0\0\x85\0\0\0\
\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\xd4\xff\0\0\0\0\x63\x7a\x78\xff\0\0\0\0\
\x61\xa0\x78\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x80\x0e\0\0\x63\x01\0\0\0\
-\0\0\0\x61\x60\x20\0\0\0\0\0\x15\0\x03\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\x61\x60\x1c\0\0\0\0\0\x15\0\x03\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
\x5c\x0e\0\0\x63\x01\0\0\0\0\0\0\xb7\x01\0\0\0\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\
\0\x50\x0e\0\0\xb7\x03\0\0\x48\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\
\xc5\x07\xc3\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x63\x71\0\0\0\0\0\
-\0\x79\x63\x18\0\0\0\0\0\x15\x03\x04\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x98\
-\x0e\0\0\xb7\x02\0\0\x62\0\0\0\x85\0\0\0\x94\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\x08\x0f\0\0\x63\x01\0\
-\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\x0f\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
-\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";
+\0\x79\x63\x20\0\0\0\0\0\x15\x03\x08\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x98\
+\x0e\0\0\xb7\x02\0\0\x62\0\0\0\x61\x60\x04\0\0\0\0\0\x45\0\x02\0\x01\0\0\0\x85\
+\0\0\0\x94\0\0\0\x05\0\x01\0\0\0\0\0\x85\0\0\0\x71\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\x08\x0f\0\0\x63\
+\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\x0f\0\0\x18\x61\0\0\0\0\0\0\0\0\
+\0\0\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\x9f\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\x92\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\
+\x5c\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\x4a\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\x13\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\x01\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);
+ skel->rodata = skel_finalize_map_data(&skel->maps.rodata.initial_value,
+ 4096, PROT_READ, skel->maps.rodata.map_fd);
+ if (!skel->rodata)
+ return -ENOMEM;
return 0;
}
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 753f3a3a7478..a72f63d5a7da 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -985,6 +985,7 @@ struct bpf_map *bpf_map_get(u32 ufd)
return map;
}
+EXPORT_SYMBOL(bpf_map_get);
struct bpf_map *bpf_map_get_with_uref(u32 ufd)
{
@@ -2492,6 +2493,7 @@ void bpf_link_put(struct bpf_link *link)
bpf_link_free(link);
}
}
+EXPORT_SYMBOL(bpf_link_put);
static int bpf_link_release(struct inode *inode, struct file *filp)
{
@@ -2634,6 +2636,7 @@ struct bpf_link *bpf_link_get_from_fd(u32 ufd)
return link;
}
+EXPORT_SYMBOL(bpf_link_get_from_fd);
struct bpf_tracing_link {
struct bpf_link link;
@@ -4759,23 +4762,52 @@ static bool syscall_prog_is_valid_access(int off, int size,
return true;
}
-BPF_CALL_3(bpf_sys_bpf, int, cmd, void *, attr, u32, attr_size)
+BPF_CALL_3(bpf_sys_bpf, int, cmd, union bpf_attr *, attr, u32, attr_size)
{
+ struct bpf_prog * __maybe_unused prog;
+
switch (cmd) {
case BPF_MAP_CREATE:
case BPF_MAP_UPDATE_ELEM:
case BPF_MAP_FREEZE:
case BPF_PROG_LOAD:
case BPF_BTF_LOAD:
+ case BPF_LINK_CREATE:
+ case BPF_RAW_TRACEPOINT_OPEN:
break;
- /* case BPF_PROG_TEST_RUN:
- * is not part of this list to prevent recursive test_run
- */
+#ifdef CONFIG_BPF_JIT /* __bpf_prog_enter_sleepable used by trampoline and JIT */
+ case BPF_PROG_TEST_RUN:
+ if (attr->test.data_in || attr->test.data_out ||
+ attr->test.ctx_out || attr->test.duration ||
+ attr->test.repeat || attr->test.flags)
+ return -EINVAL;
+
+ prog = bpf_prog_get_type(attr->test.prog_fd, BPF_PROG_TYPE_SYSCALL);
+ if (IS_ERR(prog))
+ return PTR_ERR(prog);
+
+ if (attr->test.ctx_size_in < prog->aux->max_ctx_offset ||
+ attr->test.ctx_size_in > U16_MAX) {
+ bpf_prog_put(prog);
+ return -EINVAL;
+ }
+
+ if (!__bpf_prog_enter_sleepable(prog)) {
+ /* recursion detected */
+ bpf_prog_put(prog);
+ return -EBUSY;
+ }
+ attr->test.retval = bpf_prog_run(prog, (void *) (long) attr->test.ctx_in);
+ __bpf_prog_exit_sleepable(prog, 0 /* bpf_prog_run does runtime stats */);
+ bpf_prog_put(prog);
+ return 0;
+#endif
default:
return -EINVAL;
}
return __sys_bpf(cmd, KERNEL_BPFPTR(attr), attr_size);
}
+EXPORT_SYMBOL(bpf_sys_bpf);
static const struct bpf_func_proto bpf_sys_bpf_proto = {
.func = bpf_sys_bpf,
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index bbef86cb4e72..d7473fee247c 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1842,6 +1842,7 @@ static int add_kfunc_call(struct bpf_verifier_env *env, u32 func_id, s16 offset)
struct bpf_kfunc_desc *desc;
const char *func_name;
struct btf *desc_btf;
+ unsigned long call_imm;
unsigned long addr;
int err;
@@ -1926,9 +1927,17 @@ static int add_kfunc_call(struct bpf_verifier_env *env, u32 func_id, s16 offset)
return -EINVAL;
}
+ call_imm = BPF_CALL_IMM(addr);
+ /* Check whether or not the relative offset overflows desc->imm */
+ if ((unsigned long)(s32)call_imm != call_imm) {
+ verbose(env, "address of kernel function %s is out of range\n",
+ func_name);
+ return -EINVAL;
+ }
+
desc = &tab->descs[tab->nr_descs++];
desc->func_id = func_id;
- desc->imm = BPF_CALL_IMM(addr);
+ desc->imm = call_imm;
desc->offset = offset;
err = btf_distill_func_proto(&env->log, desc_btf,
func_proto, func_name,