i40e: define proper net_device::neigh_priv_len

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[ Upstream commit 31389b53b3 ]

Out of bound read reported by KASan.

i40iw_net_event() reads unconditionally 16 bytes from
neigh->primary_key while the memory allocated for
"neighbour" struct is evaluated in neigh_alloc() as

  tbl->entry_size + dev->neigh_priv_len

where "dev" is a net_device.

But the driver does not setup dev->neigh_priv_len and
we read beyond the neigh entry allocated memory,
so the patch in the next mail fixes this.

Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Konstantin Khorenko 2018-11-23 19:10:28 +03:00 • committed by Greg Kroah-Hartman

parent 3968079afe

commit a3cc8fde51

1 changed files with 3 additions and 0 deletions

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drivers/net/ethernet/intel/i40e/i40e_main.c

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