xsk: Add missing overflow check in xdp_umem_reg

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[ Upstream commit c7df4813b1 ]

The number of chunks can overflow u32. Make sure to return -EINVAL on
overflow. Also remove a redundant u32 cast assigning umem->npgs.

Fixes: bbff2f321a ("xsk: new descriptor addressing scheme")
Signed-off-by: Kal Conley <kal.conley@dectris.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20230308174013.1114745-1-kal.conley@dectris.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Kal Conley 2023-03-08 18:40:13 +01:00 • committed by Greg Kroah-Hartman

parent 4797ad1f56

commit a069909acc

1 changed files with 7 additions and 6 deletions

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net/xdp/xdp_umem.c

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