ice: add extra check for null Rx descriptor

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[ Upstream commit 1f45ebe0d8 ]

In the case where the hardware gives us a null Rx descriptor, it is
theoretically possible that we could call one of our skb-construction
functions with no data pointer, which would cause a panic.

In real life, this will never happen - we only get null RX
descriptors as the final descriptor in a chain of otherwise-valid
descriptors. When this happens, the skb will be extant and we'll just
call ice_add_rx_frag(), which can deal with empty data buffers.

Unfortunately, Coverity does not have intimate knowledge of our
hardware, so we must add a check here.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.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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Mitch Williams 2019-12-12 03:13:05 -08:00 • committed by Greg Kroah-Hartman

parent b73dcb6cfa

commit 38a7658375

1 changed files with 8 additions and 5 deletions

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drivers/net/ethernet/intel/ice/ice_txrx.c

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