Hello:
This patch was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Fri, 29 Jul 2022 20:17:13 +0000 you wrote:
> The bpf_sys_bpf() helper function allows an eBPF program to load another
> eBPF program from within the kernel. In this case the argument union
> bpf_attr pointer (as well as the insns and license pointers inside) is a
> kernel address instead of a userspace address (which is the case of a
> usual bpf() syscall). To make the memory copying process in the syscall
> work in both cases, bpfptr_t was introduced to wrap around the pointer
> and distinguish its origin. Specifically, when copying memory contents
> from a bpfptr_t, a copy_from_user() is performed in case of a userspace
> address and a memcpy() is performed for a kernel address.
>
> [...]
Here is the summary with links:
- [v2] BPF: Fix potential bad pointer dereference in bpf_sys_bpf()
https://git.kernel.org/bpf/bpf/c/e2dcac2f58f5
You are awesome, thank you!
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