netdev - Re: [PATCH bpf-next] libbpf: fix realloc usage in bpf_core_find

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Message-ID: <7fdde53d-2d49-7e04-c2e6-51e4285b994e@fb.com>
Date:   Fri, 24 Jan 2020 21:28:55 +0000
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andriin@...com>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        William Smith <williampsmith@...com>
CC:     "andrii.nakryiko@...il.com" <andrii.nakryiko@...il.com>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH bpf-next] libbpf: fix realloc usage in bpf_core_find_cands



On 1/24/20 12:18 PM, Andrii Nakryiko wrote:
> Fix bug requesting invalid size of reallocated array when constructing CO-RE
> relocation candidate list. This can cause problems if there are many potential
> candidates and a very fine-grained memory allocator bucket sizes are used.
> 
> Fixes: ddc7c3042614 ("libbpf: implement BPF CO-RE offset relocation algorithm")
> Reported-by: William Smith <williampsmith@...com>
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Acked-by: Yonghong Song <yhs@...com>