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| author | Kal Conley <[email protected]> | 2023-04-05 23:59:18 +0000 |
|---|---|---|
| committer | Martin KaFai Lau <[email protected]> | 2023-04-06 16:53:05 +0000 |
| commit | d769ccaf957fe7391f357c0a923de71f594b8a2b (patch) | |
| tree | 04219cbe7264763a0b64b51f1db796069fbf7386 /tools/bpf/bpftool/prog.c | |
| parent | kallsyms: move module-related functions under correct configs (diff) | |
| download | kernel-d769ccaf957fe7391f357c0a923de71f594b8a2b.tar.gz kernel-d769ccaf957fe7391f357c0a923de71f594b8a2b.zip | |
xsk: Fix unaligned descriptor validation
Make sure unaligned descriptors that straddle the end of the UMEM are
considered invalid. Currently, descriptor validation is broken for
zero-copy mode which only checks descriptors at page granularity.
For example, descriptors in zero-copy mode that overrun the end of the
UMEM but not a page boundary are (incorrectly) considered valid. The
UMEM boundary check needs to happen before the page boundary and
contiguity checks in xp_desc_crosses_non_contig_pg(). Do this check in
xp_unaligned_validate_desc() instead like xp_check_unaligned() already
does.
Fixes: 2b43470add8c ("xsk: Introduce AF_XDP buffer allocation API")
Signed-off-by: Kal Conley <[email protected]>
Acked-by: Magnus Karlsson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
0 files changed, 0 insertions, 0 deletions