https://dpdk.org/tracker/show_bug.cgi?id=20
Bug ID: 20
Summary: Undefined behavior caused by NUMA function in
eal_memory
Product: DPDK
Version: unspecified
Hardware: All
OS: Linux
Status: CONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: solal.pire...@gmail.com
Target Milestone: ---
In linuxapp's eal_memory.c, the map_all_hugepages function begins by declaring
and initializing variables, including a nodemask
(http://dpdk.org/browse/dpdk/tree/lib/librte_eal/linuxapp/eal/eal_memory.c?h=v18.02#n344).
However, this initialization occurs before the numa_available function is
called. According to the libnuma documentation
(https://linux.die.net/man/3/numa), all other functions have undefined behavior
if numa_available returns -1.
The initialization of the nodemask needs to be moved after the numa_available
call, and consequently its freeing at the end of the function needs to be
conditional on it not being NULL.
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