im a kernel newbie here so pardon "the blind leading the blind" ...
doing a quick search for all calls to sk_alloc in the entire kernel
sources
yields only one call that sets the "zero out the allocated struct"
boolean
to false and that is:
net/ipv4/tcp_minisocks.c:tcp_create_openreq_chil
looking further at
net/ipv4/tcp_ipv4.c:tcp_create_openreq_child() (for 2.2.16)
and
net/ipv4/tcp_minisocks.c:tcp_create_openreq_child() (for 2.4.x)
immediately after the sk_alloc() call (if it successful) it calls
memcpy(newsk, sk, sizeof(*newsk))
i suggest setting your NULL initial value
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