Hello:
This patch was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Sat, 24 Dec 2022 21:31:46 +0800 you wrote:
> In the scenario where livepatch and kretfunc coexist, the pageattr of
> im->image is rox after arch_prepare_bpf_trampoline in
> bpf_trampoline_update, and then modify_fentry or register_fentry returns
> -EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag
> will be configured, and arch_prepare_bpf_trampoline will be re-executed.
>
> At this time, because the pageattr of im->image is rox,
> arch_prepare_bpf_trampoline will read and write im->image, which causes
> a fault. as follows:
>
> [...]
Here is the summary with links:
- bpf: Fix panic due to wrong pageattr of im->image
https://git.kernel.org/bpf/bpf/c/9ed1d9aeef58
You are awesome, thank you!
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