https://bugs.dpdk.org/show_bug.cgi?id=1687
Bug ID: 1687
Summary: ring PMD uses unsafe internal devarg
Product: DPDK
Version: 25.03
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: step...@networkplumber.org
Target Milestone: ---
The ring PMD uses and undocumented devarg of "internal=" to create network
device from ring parameters. The problem is that it passes a pointer across
devargs which leads to ruin. There is no way to validate that pointer really
points to valid data.
Example:
dpdk-testpmd --vdev=net_ring0,internal=0xdeadbeef -- -i
EAL: Detected CPU lcores: 20
EAL: Detected NUMA nodes: 1
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
Segmentation fault
This is a design flaw.
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