Messages in this thread | | | Subject | Re: [PATCH bpf-next] bpf/selftests: use bpf_num_possible_cpus() in per-cpu map allocations | From | patchwork-bot+netdevbpf@kernel ... | Date | Wed, 06 Apr 2022 17:20:12 +0000 |
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Hello:
This patch was applied to bpf/bpf-next.git (master) by Andrii Nakryiko <andrii@kernel.org>:
On Wed, 6 Apr 2022 10:54:08 +0200 you wrote: > bpf_map_value_size() uses num_possible_cpus() to determine map size, but > some of the tests only allocate enough memory for online cpus. This > results in out-of-bound writes in userspace during bpf(BPF_MAP_LOOKUP_ELEM) > syscalls in cases when number of online cpus is lower than the number of > possible cpus. Fix by switching from get_nprocs_conf() to > bpf_num_possible_cpus() when determining the number of processors in > these tests (test_progs/netcnt and test_cgroup_storage). > > [...]
Here is the summary with links: - [bpf-next] bpf/selftests: use bpf_num_possible_cpus() in per-cpu map allocations https://git.kernel.org/bpf/bpf-next/c/ebaf24c589d7
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