Luigi Leonardi 0fee717b1d vsock/virtio: fix MSG_PEEK ignoring skb offset when calculating bytes to copy ...

commit 080f22f5d3 upstream.

`virtio_transport_stream_do_peek()` does not account for the skb offset
when computing the number of bytes to copy.

This means that, after a partial recv() that advances the offset, a peek
requesting more bytes than are available in the sk_buff causes
`skb_copy_datagram_iter()` to go past the valid payload, resulting in
a -EFAULT.

The dequeue path already handles this correctly.
Apply the same logic to the peek path.

Fixes: 0df7cd3c13 ("vsock/virtio/vhost: read data from non-linear skb")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
Signed-off-by: Luigi Leonardi <leonardi@redhat.com>
Link: https://patch.msgid.link/20260415-fix_peek-v4-1-8207e872759e@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-05-17 17:14:29 +02:00

..

af_vsock_tap.c

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af_vsock.c

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diag.c

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hyperv_transport.c

hv_sock: fix ARM64 support

2026-05-14 15:29:22 +02:00

Kconfig

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Makefile

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virtio_transport_common.c

vsock/virtio: fix MSG_PEEK ignoring skb offset when calculating bytes to copy

2026-05-17 17:14:29 +02:00

virtio_transport.c

vsock/virtio: Rename virtio_vsock_skb_rx_put()

2026-01-30 10:28:49 +01:00

vmci_transport_notify_qstate.c

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vmci_transport_notify.c

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vmci_transport_notify.h

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vmci_transport.c

vmw_vsock: bypass false-positive Wnonnull warning with gcc-16

2026-03-04 07:21:18 -05:00

vmci_transport.h

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vsock_addr.c

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vsock_bpf.c

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vsock_loopback.c

…