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| author | Jiri Olsa <jolsa@kernel.org> | 2024-06-04 18:00:24 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2024-06-05 10:41:33 +0300 |
| commit | d0d1df8ba18abc57f28fb3bc053b2bf319367f2c (patch) | |
| tree | 8292b3906975a234bf0fcb5c6aa5e5629d656703 | |
| parent | 2884dc7d08d98a89d8d65121524bb7533183a63a (diff) | |
| download | linux-d0d1df8ba18abc57f28fb3bc053b2bf319367f2c.tar.xz | |
bpf: Set run context for rawtp test_run callback
syzbot reported crash when rawtp program executed through the
test_run interface calls bpf_get_attach_cookie helper or any
other helper that touches task->bpf_ctx pointer.
Setting the run context (task->bpf_ctx pointer) for test_run
callback.
Fixes: 7adfc6c9b315 ("bpf: Add bpf_get_attach_cookie() BPF helper to access bpf_cookie value")
Reported-by: syzbot+3ab78ff125b7979e45f9@syzkaller.appspotmail.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Closes: https://syzkaller.appspot.com/bug?extid=3ab78ff125b7979e45f9
Link: https://lore.kernel.org/bpf/20240604150024.359247-1-jolsa@kernel.org
| -rw-r--r-- | net/bpf/test_run.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index f6aad4ed2ab2..36ae54f57bf5 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -727,10 +727,16 @@ static void __bpf_prog_test_run_raw_tp(void *data) { struct bpf_raw_tp_test_run_info *info = data; + struct bpf_trace_run_ctx run_ctx = {}; + struct bpf_run_ctx *old_run_ctx; + + old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); rcu_read_lock(); info->retval = bpf_prog_run(info->prog, info->ctx); rcu_read_unlock(); + + bpf_reset_run_ctx(old_run_ctx); } int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |