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bpf: bpf_event_entry_gen's alloc needs to be in atomic context 

Should have been obvious, only called from bpf() syscall via map_update_elem()
that calls bpf_fd_array_map_update_elem() under RCU read lock and thus this
must also be in GFP_ATOMIC, of course.

Fixes: 3b1efb196e ("bpf, maps: flush own entries on perf map release")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Daniel Borkmann 2016-07-16 01:15:55 +02:00 committed by David S. Miller
parent c5c4e45c4b
commit 858d68f102
1 changed files with 1 additions and 1 deletions
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kernel/bpf/arraymap.c
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@ -430,7 +430,7 @@ static struct bpf_event_entry *bpf_event_entry_gen(struct file *perf_file,
{
struct bpf_event_entry *ee;
ee = kzalloc(sizeof(*ee), GFP_KERNEL);
ee = kzalloc(sizeof(*ee), GFP_ATOMIC);
if (ee) {
ee->event = perf_file->private_data;
ee->perf_file = perf_file;