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| H A D | tun.c | diff a7385ba21102a90f902055f9f185ca02bf62fa43 Tue Jan 20 04:57:48 CST 2009 Eric W. Biederman <ebiederm@xmission.com> tun: Fix races in tun_set_iff
It is possible for two different tasks with access to the same file
descriptor to call tun_set_iff on it at the same time and race to
attach to a tap device. Prevent this by placing all of the logic to
attach to a file descriptor in one function and testing the file
descriptor to be certain it is not already attached to another tun
device.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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