projects
/
platform
/
kernel
/
linux-rpi.git
/ commitdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
| commitdiff |
tree
raw
|
patch
| inline |
side by side
(parent:
8fb2e3c
)
libbpf: Fix memory leak/double free issue
author
Andrii Nakryiko
<andriin@fb.com>
Thu, 7 Nov 2019 02:08:51 +0000
(18:08 -0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sun, 26 Jan 2020 09:00:57 +0000
(10:00 +0100)
commit
3dc5e059821376974177cc801d377e3fcdac6712
upstream.
Coverity scan against Github libbpf code found the issue of not freeing memory and
leaving already freed memory still referenced from bpf_program. Fix it by
re-assigning successfully reallocated memory sooner.
Fixes:
2993e0515bb4
("tools/bpf: add support to read .BTF.ext sections")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link:
https://lore.kernel.org/bpf/20191107020855.3834758-2-andriin@fb.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tools/lib/bpf/libbpf.c
patch
|
blob
|
history
diff --git
a/tools/lib/bpf/libbpf.c
b/tools/lib/bpf/libbpf.c
index
a267cd0
..
d98838c
100644
(file)
--- a/
tools/lib/bpf/libbpf.c
+++ b/
tools/lib/bpf/libbpf.c
@@
-3220,6
+3220,7
@@
bpf_program__reloc_text(struct bpf_program *prog, struct bpf_object *obj,
pr_warning("oom in prog realloc\n");
return -ENOMEM;
}
+ prog->insns = new_insn;
if (obj->btf_ext) {
err = bpf_program_reloc_btf_ext(prog, obj,
@@
-3231,7
+3232,6
@@
bpf_program__reloc_text(struct bpf_program *prog, struct bpf_object *obj,
memcpy(new_insn + prog->insns_cnt, text->insns,
text->insns_cnt * sizeof(*insn));
- prog->insns = new_insn;
prog->main_prog_cnt = prog->insns_cnt;
prog->insns_cnt = new_cnt;
pr_debug("added %zd insn from %s to prog %s\n",