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This reverts commit d7807a9adf4856171f8441f13078c33941df48ab.
As mentioned in https://lkml.org/lkml/2021/9/13/1819
5 years old commit 919483096bfe ("ipv4: fix memory leaks in ip_cmsg_send() callers")
was a correct fix.
ip_cmsg_send() can loop over multiple cmsghdr()
If IP_RETOPTS has been successful, but following cmsghdr generates an error,
we do not free ipc.ok
If IP_RETOPTS is not successful, we have freed the allocated temporary space,
not the one currently in ipc.opt.
Sure, code could be refactored, but let's not bring back old bugs.
Fixes: d7807a9adf48 ("Revert "ipv4: fix memory leaks in ip_cmsg_send() callers"")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>
d198b27762