Re: [PATCH v2 4.19 00/19] bpf: fix verifier selftests, add CVE-2021-29155, CVE-2021-33200 fixes

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On Fri, May 28, 2021 at 01:37:51PM +0300, Ovidiu Panait wrote:
> v2 updates:
> - fix the last failing verfifier selftest by backporting the following
>   commits:
> * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb8d251ee2a6bf4d7f4af5548e9c8f4fb5f90402
> * https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.4.y&id=37e1cdff90c1bc448edb4d73a18d89e05e36ab55
> * https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.4.y&id=a801a05ca7145fd2b72dad35bd01977014241e55
> - add CVE-2021-33200 fixes + support patch from 5.4:
> * https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.4.y&id=8ba25a9ef9b9ca84d085aea4737e6c0852aa5bfd
> * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0
> * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e
> * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5
> 
> The CVE-2021-29155 part of this series is based on Frank van der Linden's
> backport to 5.4 and 4.14:
> https://lore.kernel.org/stable/20210429220839.15667-1-fllinden@xxxxxxxxxx/
> https://lore.kernel.org/stable/20210501043014.33300-1-fllinden@xxxxxxxxxx/
> 
> With this series, all verifier selftests pass:
> /root# ./test_verifier
> ...
> Summary: 916 PASSED, 0 SKIPPED, 0 FAILED
> 
> What the series does is:
> * Fix verifier selftests by backporting various bpf/selftest upstream commits +
>   add two 4.19 specific fixes
> * Backport fixes for CVE-2021-29155 from 5.4 stable, including selftest
>   changes. Only minor context adjustements were made for 4.19 backport.
> * Backport CVE-2021-33200 fixes. No modifications were made, all patches
>   apply cleanly.
> 
> The following commits that fix selftests are 4.19 specific:
> Ovidiu Panait (2):
>    1. bpf: fix up selftests after backports were fixed
> 
>       This is the 4.19 equivalent of
>       https://lore.kernel.org/stable/20210501043014.33300-3-fllinden@xxxxxxxxxx/
> 
>       Basically a backport of upstream commit 80c9b2fae87b ("bpf: add various
>       test cases to selftests") adapted to 4.19 in order to fix the
>       selftests that began to fail after CVE-2019-7308 fixes.
> 
>   2. selftests/bpf: add selftest part of "bpf: improve verifier branch
>      analysis"
> 
>      This is a cherry-pick of the selftest parts that have been left out when
>      backporting 4f7b3e82589e0 ("bpf: improve verifier branch analysis") to 4.19.

All now queued up, thanks!

greg k-h



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