Re: [PATCH bpf] bpf: fix bug in mmap() implementation for BPF array map
From: Yonghong Song <hidden>
Date: 2020-05-13 03:20:19
Also in:
bpf
On 5/12/20 4:59 PM, Andrii Nakryiko wrote:
mmap() subsystem allows user-space application to memory-map region with
initial page offset. This wasn't taken into account in initial implementation
of BPF array memory-mapping. This would result in wrong pages, not taking into
account requested page shift, being memory-mmaped into user-space. This patch
fixes this gap and adds a test for such scenario.
Fixes: fc9702273e2e ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY")
Signed-off-by: Andrii Nakryiko <redacted>Acked-by: Yonghong Song <redacted>