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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-13 15:14:37 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-13 15:14:37 -0300 |
| commit | 473b2922c7e54260268c9bb037d2ff9f327422ab (patch) | |
| tree | 40cee01f50cb0f285399c406ceba7b5acb58e486 /kernel/bpf/stackmap.c | |
| parent | da66658638c947cab0fb157289f03698453ff8d5 (diff) | |
| parent | 89698becf06d341a700913c3d89ce2a914af69a2 (diff) | |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes from perf/urgent that got into upstream.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index be35bfb7fb13..6fbc2abe9c91 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -517,9 +517,17 @@ const struct bpf_func_proto bpf_get_stack_proto = { BPF_CALL_4(bpf_get_task_stack, struct task_struct *, task, void *, buf, u32, size, u64, flags) { - struct pt_regs *regs = task_pt_regs(task); + struct pt_regs *regs; + long res; - return __bpf_get_stack(regs, task, NULL, buf, size, flags); + if (!try_get_task_stack(task)) + return -EFAULT; + + regs = task_pt_regs(task); + res = __bpf_get_stack(regs, task, NULL, buf, size, flags); + put_task_stack(task); + + return res; } BTF_ID_LIST_SINGLE(bpf_get_task_stack_btf_ids, struct, task_struct) |