virtio-net: ensure the received length does not exceed allocated size

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commit 315dbdd7cd upstream.

In xdp_linearize_page, when reading the following buffers from the ring,
we forget to check the received length with the true allocate size. This
can lead to an out-of-bound read. This commit adds that missing check.

Cc: <stable@vger.kernel.org>
Fixes: 4941d472bf ("virtio-net: do not reset during XDP set")
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://patch.msgid.link/20250630144212.48471-2-minhquangbui99@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Bui Quang Minh 2025-06-30 21:42:10 +07:00 • committed by Greg Kroah-Hartman

parent 892f6ed9a4

commit bc68bc3563

1 changed files with 34 additions and 4 deletions

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38

drivers/net/virtio_net.c

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