linux-stable-mirror

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-09-22 09:34:56 +02:00

Files

T

Jiri Olsa e8bd8274ae libbpf: Prevent double close and leak of btf objects

[ Upstream commit 380044c40b ]

Sashiko found possible double close of btf object fd [1],
which happens when strdup in load_module_btfs fails at which
point the obj->btf_module_cnt is already incremented.

The error path close btf fd and so does later cleanup code in
bpf_object_post_load_cleanup function.

Also libbpf_ensure_mem failure leaves btf object not assigned
and it's leaked.

Replacing the err_out label with break to make the error path
less confusing as suggested by Alan.

Incrementing obj->btf_module_cnt only if there's no failure
and releasing btf object in error path.

Fixes: 91abb4a6d7 ("libbpf: Support attachment of BPF tracing programs to kernel modules")
[1] https://sashiko.dev/#/patchset/20260324081846.2334094-1-jolsa%40kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260416100034.1610852-1-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-05-23 13:06:52 +02:00

api

libapi: Add missing header with NAME_MAX define to io_dir.h

2025-03-13 00:29:36 -07:00

bpf

libbpf: Prevent double close and leak of btf objects

2026-05-23 13:06:52 +02:00

perf

libperf build: Always place libperf includes first

2026-03-04 07:19:27 -05:00

subcmd

libsubcmd: Fix null intersection case in exclude_cmds()