Commit dc685409 authored by Hou Tao's avatar Hou Tao Committed by Alexei Starovoitov
Browse files

bpf: Use GFP_KERNEL in bpf_event_entry_gen() 



rcu_read_lock() is no longer held when invoking bpf_event_entry_gen()
which is called by perf_event_fd_array_get_ptr(), so using GFP_KERNEL
instead of GFP_ATOMIC to reduce the possibility of failures due to
out-of-memory.

Acked-by: default avatarYonghong Song <yonghong.song@linux.dev>
Signed-off-by: default avatarHou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20231214043010.3458072-3-houtao@huaweicloud.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 8f82583f

kernel/bpf/arraymap.c

+1 −1
Original line number Diff line number Diff line
@@ -1195,7 +1195,7 @@ static struct bpf_event_entry *bpf_event_entry_gen(struct file *perf_file, 
{

	struct bpf_event_entry *ee;



	ee = kzalloc(sizeof(*ee), GFP_ATOMIC);

	ee = kzalloc(sizeof(*ee), GFP_KERNEL);

	if (ee) {

		ee->event = perf_file->private_data;

		ee->perf_file = perf_file;