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I suggested to put DEBUG_NET_WARN_ON_ONCE() in __sock_create() to catch possible use-after-free. But the warning itself was not useful because our interest is in the callee than the caller. Let's define DEBUG_NET_WARN_ONCE() and print the name of pf->create() and the socket identifier. While at it, we enclose DEBUG_NET_WARN_ON_ONCE() in parentheses too to avoid a checkpatch error. Note that %pf or %pF were obsoleted and will be removed later as per comment in lib/vsprintf.c. Link: https://lore.kernel.org/netdev/202410231427.633734b3-lkp@intel.com/ Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20241024201458.49412-1-kuniyu@amazon.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>