From 87b7b5335e6995a6d64fca98fc67b92b29caac9c Mon Sep 17 00:00:00 2001 From: Yonghong Song Date: Mon, 9 Aug 2021 16:51:51 -0700 Subject: bpf: Add missing bpf_read_[un]lock_trace() for syscall program Commit 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.") added support for syscall program, which is a sleepable program. But the program run missed bpf_read_lock_trace()/bpf_read_unlock_trace(), which is needed to ensure proper rcu callback invocations. This patch adds bpf_read_[un]lock_trace() properly. Fixes: 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.") Signed-off-by: Yonghong Song Signed-off-by: Daniel Borkmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210809235151.1663680-1-yhs@fb.com --- net/bpf/test_run.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'net/bpf/test_run.c') diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 1cc75c811e24..caa16bf30fb5 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -951,7 +952,10 @@ int bpf_prog_test_run_syscall(struct bpf_prog *prog, goto out; } } + + rcu_read_lock_trace(); retval = bpf_prog_run_pin_on_cpu(prog, ctx); + rcu_read_unlock_trace(); if (copy_to_user(&uattr->test.retval, &retval, sizeof(u32))) { err = -EFAULT; -- cgit v1.2.3