On Thu, Apr 02, 2026 at 10:18:00AM +0200, Luigi Leonardi wrote: > `virtio_transport_stream_do_peek`, when calculating the number of bytes to > copy, > didn't consider the `offset`, caused by partial reads that happend before. > This might cause out-of-bounds read that lead to an EFAULT. > More details in the commit. > > Commit 1 introduces the fix > Commit 2 introduces a test that checks for this bug to avoid future > regressions. > > Signed-off-by: Luigi Leonardi <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]> > --- > Luigi Leonardi (2): > vsock/virtio: fix MSG_PEEK ignoring skb offset when calculating bytes > to copy > vsock/test: add MSG_PEEK after partial recv test > > net/vmw_vsock/virtio_transport_common.c | 5 ++- > tools/testing/vsock/vsock_test.c | 64 > +++++++++++++++++++++++++++++++++ > 2 files changed, 66 insertions(+), 3 deletions(-) > --- > base-commit: 9147566d801602c9e7fc7f85e989735735bf38ba > change-id: 20260401-fix_peek-6837b83469e3 > > Best regards, > -- > Luigi Leonardi <[email protected]>
