diff mbox series

[bpf-next,v3,2/2] bpf: Use GFP_KERNEL in bpf_event_entry_gen()

Message ID 20231214043010.3458072-3-houtao@huaweicloud.com (mailing list archive)
State Accepted
Commit dc68540913ac523b46ebda3843cec179362c7a72
Delegated to: BPF
Headers show
Series bpf: Use GFP_KERNEL in bpf_event_entry_gen() | expand

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Commit Message

Hou Tao Dec. 14, 2023, 4:30 a.m. UTC 
From: Hou Tao <houtao1@huawei.com>

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: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Hou Tao <houtao1@huawei.com>
---
 kernel/bpf/arraymap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c
index 8d365bda9a8b..b5ec24b3563e 100644
--- a/kernel/bpf/arraymap.c
+++ b/kernel/bpf/arraymap.c
@@ -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;