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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-01-08 00:06:52 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-01-08 00:06:52 +0100 |
| commit | bc351f07260533cc1b3987339551decd00ddd52e (patch) | |
| tree | 3b6f396681f08dacc8dd24ce2c586ea2195e825d /include/net/ipv6_frag.h | |
| parent | KVM: SVM: fix 32-bit compilation (diff) | |
| parent | KVM: x86/mmu: Optimize not-present/MMIO SPTE check in get_mmio_spte() (diff) | |
| download | linux-bc351f07260533cc1b3987339551decd00ddd52e.tar.xz linux-bc351f07260533cc1b3987339551decd00ddd52e.zip | |
Merge branch 'kvm-master' into kvm-next
Fixes to get_mmio_spte, destined to 5.10 stable branch.
Diffstat (limited to 'include/net/ipv6_frag.h')
| -rw-r--r-- | include/net/ipv6_frag.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/net/ipv6_frag.h b/include/net/ipv6_frag.h index a21e8b1381a1..851029ecff13 100644 --- a/include/net/ipv6_frag.h +++ b/include/net/ipv6_frag.h @@ -108,5 +108,35 @@ out_rcu_unlock: rcu_read_unlock(); inet_frag_put(&fq->q); } + +/* Check if the upper layer header is truncated in the first fragment. */ +static inline bool +ipv6frag_thdr_truncated(struct sk_buff *skb, int start, u8 *nexthdrp) +{ + u8 nexthdr = *nexthdrp; + __be16 frag_off; + int offset; + + offset = ipv6_skip_exthdr(skb, start, &nexthdr, &frag_off); + if (offset < 0 || (frag_off & htons(IP6_OFFSET))) + return false; + switch (nexthdr) { + case NEXTHDR_TCP: + offset += sizeof(struct tcphdr); + break; + case NEXTHDR_UDP: + offset += sizeof(struct udphdr); + break; + case NEXTHDR_ICMP: + offset += sizeof(struct icmp6hdr); + break; + default: + offset += 1; + } + if (offset > skb->len) + return true; + return false; +} + #endif #endif |