[dpdk-dev] [PATCH v4 0/4] Memory corruption due to HW rings allocation

[Renata Saiakhova <Renata.Saiakhova@ekinops.com>]

igb and ixgbe and some other drivers allocate HW rings using
rte_eth_dma_zone_reserve(),
which checks first if the memzone exists for a given name, consisting of port
id, queue_id, rx/tx direction, but not for the size, alignment, and socket_id.
If the memzone with a given name exists it is returned, otherwise it is
allocated.
Disconnecting dpdk port from one type of interface (igb) and connecting it
to another type of interface (ixgbe) for the same port id, potentially creates
memory overlap and corruption, because it may require memzone of bigger size.
That's what is happening from switching from igb to ixgbe having the same port
id.

v3->v4: Improve return code in rte_eth_dma_zone_free() in case mz is not found;
        Release explicitly i40e Flow Director rx/tx rings by calling
        rte_eth_dma_zone_free().
v2->v3: Remove #undef ETH_DMA_MZONE_NAME and minor changes in code standard.
v1->v2: Minor changes on code standard and additional fixes in i40e em and ice
drivers.

Renata Saiakhova (4):
  librte_ethdev: Introduce a function to release HW rings
  drivers/net: Fix in igb and ixgbe HW rings memory
  drivers/net: Fix in i40e HW rings memory overlap
  drivers/net: Fix in em and ice HW rings memory overlap

 drivers/net/e1000/em_rxtx.c              |  2 ++
 drivers/net/e1000/igb_rxtx.c             |  2 ++
 drivers/net/i40e/i40e_fdir.c             |  3 +++
 drivers/net/i40e/i40e_rxtx.c             |  2 ++
 drivers/net/ice/ice_rxtx.c               |  2 ++
 drivers/net/ixgbe/ixgbe_rxtx.c           |  2 ++
 lib/librte_ethdev/rte_ethdev.c           | 30 ++++++++++++++++++++++--
 lib/librte_ethdev/rte_ethdev_driver.h    | 20 ++++++++++++++++
 lib/librte_ethdev/rte_ethdev_version.map |  1 +
 9 files changed, 62 insertions(+), 2 deletions(-)

-- 
2.17.2