This is a note to let you know that I've just added the patch titled
libbpf: prefer global symbols as bpf program name source
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libbpf-prefer-global-symbols-as-bpf-program-name-source.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Mar 22 14:03:39 CET 2018
From: Roman Gushchin <guro@xxxxxx>
Date: Wed, 13 Dec 2017 15:18:52 +0000
Subject: libbpf: prefer global symbols as bpf program name source
From: Roman Gushchin <guro@xxxxxx>
[ Upstream commit fe4d44b23f6b38194a92c6b8a50d921a071c4db4 ]
Libbpf picks the name of the first symbol in the corresponding
elf section to use as a program name. But without taking symbol's
scope into account it may end's up with some local label
as a program name. E.g.:
$ bpftool prog
1: type 15 name LBB0_10 tag 0390a5136ba23f5c
loaded_at Dec 07/17:22 uid 0
xlated 456B not jited memlock 4096B
Fix this by preferring global symbols as program name.
For instance:
$ bpftool prog
1: type 15 name bpf_prog1 tag 0390a5136ba23f5c
loaded_at Dec 07/17:26 uid 0
xlated 456B not jited memlock 4096B
Signed-off-by: Roman Gushchin <guro@xxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>
Cc: Martin KaFai Lau <kafai@xxxxxx>
Cc: Quentin Monnet <quentin.monnet@xxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/lib/bpf/libbpf.c | 2 ++
1 file changed, 2 insertions(+)
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -387,6 +387,8 @@ bpf_object__init_prog_names(struct bpf_o
continue;
if (sym.st_shndx != prog->idx)
continue;
+ if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL)
+ continue;
name = elf_strptr(obj->efile.elf,
obj->efile.strtabidx,
Patches currently in stable-queue which might be from guro@xxxxxx are
queue-4.15/libbpf-prefer-global-symbols-as-bpf-program-name-source.patch
queue-4.15/bpf-cgroup-fix-a-verification-error-for-a-cgroup_device-type-prog.patch