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%3Ba=su...
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@vger.kernel.org know about it.
From foo@baz Thu Mar 22 14:03:39 CET 2018
From: Roman Gushchin guro@fb.com Date: Wed, 13 Dec 2017 15:18:52 +0000 Subject: libbpf: prefer global symbols as bpf program name source
From: Roman Gushchin guro@fb.com
[ 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@fb.com Cc: Alexei Starovoitov ast@kernel.org Cc: Daniel Borkmann daniel@iogearbox.net Cc: Jakub Kicinski jakub.kicinski@netronome.com Cc: Martin KaFai Lau kafai@fb.com Cc: Quentin Monnet quentin.monnet@netronome.com Cc: David Ahern dsahern@gmail.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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@fb.com 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