Hello:
This series was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Tue, 28 Jan 2025 17:22:45 -0800 you wrote:
> For all BPF maps we ensure that VM_MAYWRITE is cleared when
> memory-mapping BPF map contents as initially read-only VMA. This is
> because in some cases BPF verifier relies on the underlying data to not
> be modified afterwards by user space, so once something is mapped
> read-only, it shouldn't be re-mmap'ed as read-write.
>
> As such, it's not necessary to check VM_MAYWRITE in bpf_map_mmap() and
> map->ops->map_mmap() callbacks: VM_WRITE should be consistently set for
> read-write mappings, and if VM_WRITE is not set, there is no way for
> user space to upgrade read-only mapping to read-write one.
>
> [...]
Here is the summary with links:
- [v2,bpf-next,1/2] bpf: unify VM_WRITE vs VM_MAYWRITE use in BPF map mmaping logic
https://git.kernel.org/bpf/bpf/c/98671a0fd1f1
- [v2,bpf-next,2/2] bpf: avoid holding freeze_mutex during mmap operation
https://git.kernel.org/bpf/bpf/c/bc27c52eea18
You are awesome, thank you!
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