Messages in this thread | | | From | Martin Lau <> | Subject | Re: [PATCH bpf v2] bpftool: Don't crash on missing jited insns or ksyms | Date | Tue, 10 Dec 2019 18:21:45 +0000 |
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On Tue, Dec 10, 2019 at 07:14:12PM +0100, Toke Høiland-Jørgensen wrote: > When the kptr_restrict sysctl is set, the kernel can fail to return > jited_ksyms or jited_prog_insns, but still have positive values in > nr_jited_ksyms and jited_prog_len. This causes bpftool to crash when trying > to dump the program because it only checks the len fields not the actual > pointers to the instructions and ksyms. > > Fix this by adding the missing checks. Acked-by: Martin KaFai Lau <kafai@fb.com>
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