Don't allow allocating a new send tag on an INP which is being torn down.
This fixes a potential send tag leak. Reviewed by: rrs@ MFC after: 1 week Sponsored by: Mellanox Technologies // NVIDIA Networking
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@ -3399,7 +3399,12 @@ in_pcbattach_txrtlmt(struct inpcb *inp, struct ifnet *ifp,
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INP_WLOCK_ASSERT(inp);
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if (*st != NULL)
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/*
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* If there is already a send tag, or the INP is being torn
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* down, allocating a new send tag is not allowed. Else send
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* tags may leak.
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*/
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if (*st != NULL || (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) != 0)
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return (EINVAL);
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error = m_snd_tag_alloc(ifp, ¶ms, st);
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