!146 backport patches from upstream

From: @zhang-mingyi66 
Reviewed-by: @bitcoffee 
Signed-off-by: @bitcoffee

backport-libbpf-Add-NULL-checks-to-bpf_object__prev_map,next_.patch

@@ -0,0 +1,53 @@
+From 1867490d8fc635c552569d51c48debff588d2191 Mon Sep 17 00:00:00 2001
+From: Andreas Ziegler <ziegler.andreas@siemens.com>
+Date: Wed, 3 Jul 2024 10:34:36 +0200
+Subject: [PATCH] libbpf: Add NULL checks to bpf_object__{prev_map,next_map}
+
+In the current state, an erroneous call to
+bpf_object__find_map_by_name(NULL, ...) leads to a segmentation
+fault through the following call chain:
+
+  bpf_object__find_map_by_name(obj = NULL, ...)
+  -> bpf_object__for_each_map(pos, obj = NULL)
+  -> bpf_object__next_map((obj = NULL), NULL)
+  -> return (obj = NULL)->maps
+
+While calling bpf_object__find_map_by_name with obj = NULL is
+obviously incorrect, this should not lead to a segmentation
+fault but rather be handled gracefully.
+
+As __bpf_map__iter already handles this situation correctly, we
+can delegate the check for the regular case there and only add
+a check in case the prev or next parameter is NULL.
+
+Signed-off-by: Andreas Ziegler <ziegler.andreas@siemens.com>
+Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
+Link: https://lore.kernel.org/bpf/20240703083436.505124-1-ziegler.andreas@siemens.com
+---
+ src/libbpf.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/libbpf.c b/src/libbpf.c
+index 4a28fac49..30f121754 100644
+--- a/src/libbpf.c
++++ b/src/libbpf.c
+@@ -10375,7 +10375,7 @@ __bpf_map__iter(const struct bpf_map *m, const struct bpf_object *obj, int i)
+ struct bpf_map *
+ bpf_object__next_map(const struct bpf_object *obj, const struct bpf_map *prev)
+ {
+-	if (prev == NULL)
++	if (prev == NULL && obj != NULL)
+ 		return obj->maps;
+ 
+ 	return __bpf_map__iter(prev, obj, 1);
+@@ -10384,7 +10384,7 @@ bpf_object__next_map(const struct bpf_object *obj, const struct bpf_map *prev)
+ struct bpf_map *
+ bpf_object__prev_map(const struct bpf_object *obj, const struct bpf_map *next)
+ {
+-	if (next == NULL) {
++	if (next == NULL && obj != NULL) {
+ 		if (!obj->nr_maps)
+ 			return NULL;
+ 		return obj->maps + obj->nr_maps - 1;
+--
+2.33.0

backport-libbpf-Apply-map_set_def_max_entries-for-inner_maps-.patch

@@ -0,0 +1,49 @@
+From 89ca11a79bb93824e82897bdb48727b5d75e469a Mon Sep 17 00:00:00 2001
+From: Andrey Grafin <conquistador@yandex-team.ru>
+Date: Wed, 17 Jan 2024 16:06:18 +0300
+Subject: [PATCH] libbpf: Apply map_set_def_max_entries() for inner_maps on
+ creation
+
+This patch allows to auto create BPF_MAP_TYPE_ARRAY_OF_MAPS and
+BPF_MAP_TYPE_HASH_OF_MAPS with values of BPF_MAP_TYPE_PERF_EVENT_ARRAY
+by bpf_object__load().
+
+Previous behaviour created a zero filled btf_map_def for inner maps and
+tried to use it for a map creation but the linux kernel forbids to create
+a BPF_MAP_TYPE_PERF_EVENT_ARRAY map with max_entries=0.
+
+Fixes: 646f02ffdd49 ("libbpf: Add BTF-defined map-in-map support")
+Signed-off-by: Andrey Grafin <conquistador@yandex-team.ru>
+Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
+Acked-by: Yonghong Song <yonghong.song@linux.dev>
+Acked-by: Hou Tao <houtao1@huawei.com>
+Link: https://lore.kernel.org/bpf/20240117130619.9403-1-conquistador@yandex-team.ru
+Signed-off-by: Alexei Starovoitov <ast@kernel.org>
+---
+ src/libbpf.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/libbpf.c b/src/libbpf.c
+index afd09571c..b8b00da62 100644
+--- a/src/libbpf.c
++++ b/src/libbpf.c
+@@ -70,6 +70,7 @@
+ 
+ static struct bpf_map *bpf_object__add_map(struct bpf_object *obj);
+ static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog);
++static int map_set_def_max_entries(struct bpf_map *map);
+ 
+ static int __base_pr(enum libbpf_print_level level, const char *format,
+ 		     va_list args)
+@@ -5172,6 +5173,9 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map, b
+ 
+ 	if (bpf_map_type__is_map_in_map(def->type)) {
+ 		if (map->inner_map) {
++			err = map_set_def_max_entries(map->inner_map);
++			if (err)
++				return err;
+ 			err = bpf_object__create_map(obj, map->inner_map, true);
+ 			if (err) {
+ 				pr_warn("map '%s': failed to create inner map: %d\n",
+--
+2.33.0

backport-libbpf-Fix-uninitialized-warning-in-btf_dump_dump_ty.patch

@@ -0,0 +1,42 @@
+From c975797ebecb07934d1399e1595db8e0d55bec04 Mon Sep 17 00:00:00 2001
+From: David Michael <fedora.dm0@gmail.com>
+Date: Sun, 13 Nov 2022 15:52:17 -0500
+Subject: [PATCH] libbpf: Fix uninitialized warning in btf_dump_dump_type_data
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+GCC 11.3.0 fails to compile btf_dump.c due to the following error,
+which seems to originate in btf_dump_struct_data where the returned
+value would be uninitialized if btf_vlen returns zero.
+
+btf_dump.c: In function ‘btf_dump_dump_type_data’:
+btf_dump.c:2363:12: error: ‘err’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
+ 2363 |         if (err < 0)
+      |            ^
+
+Fixes: 920d16af9b42 ("libbpf: BTF dumper support for typed data")
+Signed-off-by: David Michael <fedora.dm0@gmail.com>
+Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
+Acked-by: Stanislav Fomichev <sdf@google.com>
+Acked-by: Alan Maguire <alan.maguire@oracle.com>
+Link: https://lore.kernel.org/bpf/87zgcu60hq.fsf@gmail.com
+---
+ src/btf_dump.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/btf_dump.c b/src/btf_dump.c
+index 12f7039e0..e9f849d82 100644
+--- a/src/btf_dump.c
++++ b/src/btf_dump.c
+@@ -1989,7 +1989,7 @@ static int btf_dump_struct_data(struct btf_dump *d,
+ {
+ 	const struct btf_member *m = btf_members(t);
+ 	__u16 n = btf_vlen(t);
+-	int i, err;
++	int i, err = 0;
+ 
+ 	/* note that we increment depth before calling btf_dump_print() below;
+ 	 * this is intentional.  btf_dump_data_newline() will not print a
+--
+2.33.0

libbpf.spec

@@ -4,7 +4,7 @@
 
 Name:           %{githubname}
 Version:        %{githubver}
-Release:        15
+Release:        16
 Summary:        Libbpf library
 
 License:        LGPLv2 or BSD
@@ -44,6 +44,10 @@ Patch0027:      backport-libbpf-Initialize-err-in-probe_map_create.patch
 Patch0028:      backport-libbpf-Modify-the-function-name-in-libbpf.c-to-match.patch
 Patch0029:      backport-libbpf-Fix-an-error-in-64bit-relocation-value-comput.patch
 Patch0030:      backport-libbpf-Avoid-uninitialized-value-in-BPF_CORE_READ_BI.patch
+Patch0031:      backport-libbpf-Add-NULL-checks-to-bpf_object__prev_map,next_.patch
+Patch0032:      backport-libbpf-Apply-map_set_def_max_entries-for-inner_maps-.patch
+Patch0033:      backport-libbpf-Fix-uninitialized-warning-in-btf_dump_dump_ty.patch
+
 
 # This package supersedes libbpf from kernel-tools,
 # which has default Epoch: 0. By having Epoch: 1
@@ -96,6 +100,12 @@ developing applications that use %{name}
 %{_libdir}/libbpf.a
 
 %changelog
+* Wed Oct 09 2024 zhangmingyi <zhangmingyi5@huawei.com> 2:0.8.1-16
+- backport patch from upstream:
+  backport-libbpf-Add-NULL-checks-to-bpf_object__prev_map,next_.patch
+  backport-libbpf-Apply-map_set_def_max_entries-for-inner_maps-.patch
+  backport-libbpf-Fix-uninitialized-warning-in-btf_dump_dump_ty.patch
+
 * Wed Sep 25 2024 zhangmingyi <zhangmingyi5@huawei.com> 2:0.8.1-15
 - backport patch from upstream:
   backport-libbpf-Avoid-uninitialized-value-in-BPF_CORE_READ_BI.patch