#ifndef MPLS_INTERNAL_H #define MPLS_INTERNAL_H #include struct mpls_entry_decoded { u32 label; u8 ttl; u8 tc; u8 bos; }; struct mpls_dev { int input_enabled; struct ctl_table_header *sysctl; struct rcu_head rcu; }; struct sk_buff; #define LABEL_NOT_SPECIFIED (1 << 20) #define MAX_NEW_LABELS 2 /* This maximum ha length copied from the definition of struct neighbour */ #define VIA_ALEN_ALIGN sizeof(unsigned long) #define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, VIA_ALEN_ALIGN)) enum mpls_payload_type { MPT_UNSPEC, /* IPv4 or IPv6 */ MPT_IPV4 = 4, MPT_IPV6 = 6, /* Other types not implemented: * - Pseudo-wire with or without control word (RFC4385) * - GAL (RFC5586) */ }; struct mpls_nh { /* next hop label forwarding entry */ struct net_device __rcu *nh_dev; unsigned int nh_flags; u32 nh_label[MAX_NEW_LABELS]; u8 nh_labels; u8 nh_via_alen; u8 nh_via_table; }; /* The route, nexthops and vias are stored together in the same memory * block: * * +----------------------+ * | mpls_route | * +----------------------+ * | mpls_nh 0 | * +----------------------+ * | ... | * +----------------------+ * | mpls_nh n-1 | * +----------------------+ * | alignment padding | * +----------------------+ * | via[rt_max_alen] 0 | * +----------------------+ * | ... | * +----------------------+ * | via[rt_max_alen] n-1 | * +----------------------+ */ struct mpls_route { /* next hop label forwarding entry */ struct rcu_head rt_rcu; u8 rt_protocol; u8 rt_payload_type; u8 rt_max_alen; unsigned int rt_nhn; unsigned int rt_nhn_alive; struct mpls_nh rt_nh[0]; }; #define for_nexthops(rt) { \ int nhsel; struct mpls_nh *nh; \ for (nhsel = 0, nh = (rt)->rt_nh; \ nhsel < (rt)->rt_nhn; \ nh++, nhsel++) #define change_nexthops(rt) { \ int nhsel; struct mpls_nh *nh; \ for (nhsel = 0, nh = (struct mpls_nh *)((rt)->rt_nh); \ nhsel < (rt)->rt_nhn; \ nh++, nhsel++) #define endfor_nexthops(rt) } static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos) { struct mpls_shim_hdr result; result.label_stack_entry = cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) | (tc << MPLS_LS_TC_SHIFT) | (bos ? (1 << MPLS_LS_S_SHIFT) : 0) | (ttl << MPLS_LS_TTL_SHIFT)); return result; } static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr) { struct mpls_entry_decoded result; unsigned entry = be32_to_cpu(hdr->label_stack_entry); result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT; result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT; result.tc = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT; result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT; return result; } int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, const u32 label[]); int nla_get_labels(const struct nlattr *nla, u32 max_labels, u8 *labels, u32 label[]); int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table, u8 via[]); bool mpls_output_possible(const struct net_device *dev); unsigned int mpls_dev_mtu(const struct net_device *dev); bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu); #endif /* MPLS_INTERNAL_H */ ;'>space:mode:
authorDan Carpenter <dan.carpenter@oracle.com>2017-01-30 10:55:04 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-30 16:37:55 -0500
commitcdaf25dfc058ee6f7a7b2e2353de00fa288c0cd4 (patch)
treea45096fd9e8aaeea2eac1f1999a3d17dfeb0d02b /net/netrom/nr_in.c
parent1930b60352e7e195f55b27cde15d2a8f43342a8b (diff)
smc: some potential use after free bugs
Say we got really unlucky and these failed on the last iteration, then it could lead to a use after free bug. Fixes: cd6851f30386 ("smc: remote memory buffers (RMBs)") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netrom/nr_in.c')