[Bug 194577] mbuf packet header leakage when closing TUN devices
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Mon Oct 27 19:54:35 UTC 2014
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194577
--- Comment #8 from Andrey V. Elsukov <ae at FreeBSD.org> ---
Comment on attachment 148695
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=148695
kernel function for printing mbuf info
> printf("mbuf %p: len %u, flags %b\n", m, m->m_len,
> m->m_flags, M_FLAG_PRINTF);
Nothing specific :(
It seems the last what here can be interesting is the following:
if (m->m_flags & M_PKTHDR)
printf(" hdrlen %u\n", m, m->m_pkthdr.len)
> if (m->m_len < sizeof(struct ip))
> return;
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