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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-12 08:15:27 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-12 08:15:27 +0200 |
| commit | 14d34d2dbbe2d9144a65bae1549202d1717062e2 (patch) | |
| tree | 8d8a84be09fa898bdfdf14e7783cd6b42d6bb0ed /kernel/bpf/stackmap.c | |
| parent | 3db53374405fbf7a474086ed984189f65b6f0008 (diff) | |
| parent | d434405aaab7d0ebc516b68a8fc4100922d7f5ef (diff) | |
Merge 5.12-rc7 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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) |