| Message ID | 1601292670-1616-6-git-send-email-alan.maguire@oracle.com |
|---|---|
| State | Accepted |
| Commit | af65320948b848dd1ae65eb4bc3e164c53e741d8 |
| Headers | show |
| Series | bpf: add helpers to support BTF-based kernel data display | expand |
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c index 30833bb..8f10e30 100644 --- a/kernel/bpf/bpf_iter.c +++ b/kernel/bpf/bpf_iter.c @@ -88,8 +88,8 @@ static ssize_t bpf_seq_read(struct file *file, char __user *buf, size_t size, mutex_lock(&seq->lock); if (!seq->buf) { - seq->size = PAGE_SIZE; - seq->buf = kmalloc(seq->size, GFP_KERNEL); + seq->size = PAGE_SIZE << 3; + seq->buf = kvmalloc(seq->size, GFP_KERNEL); if (!seq->buf) { err = -ENOMEM; goto done;
BPF iter size is limited to PAGE_SIZE; if we wish to display BTF-based representations of larger kernel data structures such as task_struct, this will be insufficient. Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Alan Maguire <alan.maguire@oracle.com> --- kernel/bpf/bpf_iter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)