netdev - [PATCH net-next 0/3] LiquidIO: avoid VM low memory crashes

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Message-ID: <20170608035045.GA1608@felix-thinkpad.cavium.com>
Date:   Wed, 7 Jun 2017 20:50:45 -0700
From:   Felix Manlunas <felix.manlunas@...ium.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, raghu.vatsavayi@...ium.com,
        derek.chickles@...ium.com, satananda.burla@...ium.com,
        ricardo.farrington@...ium.com
Subject: [PATCH net-next 0/3] LiquidIO: avoid VM low memory crashes

From: Rick Farrington <ricardo.farrington@...ium.com>

This patchset addresses issues brought about by low memory conditions
in a VM.  These conditions were only seen when VM's were intentionally
created with small amounts of memory (for stress testing).

1. Fix GPF in octeon_init_droq(); zero the allocated block 'recv_buf_list'.
   This prevents a GPF trying to access an invalid 'recv_buf_list[i]' entry
   in octeon_droq_destroy_ring_buffers() if init didn't alloc all entries.
2. Don't dereference a NULL ptr in octeon_droq_destroy_ring_buffers().
3. For defensive programming, zero the allocated block 'oct->droq[0]' in
   octeon_setup_output_queues() and 'oct->instr_queue[0]' in    
   octeon_setup_instr_queues().

 drivers/net/ethernet/cavium/liquidio/octeon_device.c | 8 ++++----
 drivers/net/ethernet/cavium/liquidio/octeon_droq.c   | 6 ++++--
 2 files changed, 8 insertions(+), 6 deletions(-)

-- 
1.8.3.1