/* * Copyright (c) 2008-2009 Patrick McHardy * Copyright (c) 2012 Pablo Neira Ayuso * Copyright (c) 2012 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Development of this code funded by Astaro AG (http://www.astaro.com/) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned int nft_nat_do_chain(void *priv, struct sk_buff *skb, const struct nf_hook_state *state, struct nf_conn *ct) { struct nft_pktinfo pkt; nft_set_pktinfo_ipv4(&pkt, skb, state); return nft_do_chain(&pkt, priv); } static unsigned int nft_nat_ipv4_fn(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { return nf_nat_ipv4_fn(priv, skb, state, nft_nat_do_chain); } static unsigned int nft_nat_ipv4_in(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { return nf_nat_ipv4_in(priv, skb, state, nft_nat_do_chain); } static unsigned int nft_nat_ipv4_out(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { return nf_nat_ipv4_out(priv, skb, state, nft_nat_do_chain); } static unsigned int nft_nat_ipv4_local_fn(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { return nf_nat_ipv4_local_fn(priv, skb, state, nft_nat_do_chain); } static const struct nf_chain_type nft_chain_nat_ipv4 = { .name = "nat", .type = NFT_CHAIN_T_NAT, .family = NFPROTO_IPV4, .owner = THIS_MODULE, .hook_mask = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_LOCAL_IN), .hooks = { [NF_INET_PRE_ROUTING] = nft_nat_ipv4_in, [NF_INET_POST_ROUTING] = nft_nat_ipv4_out, [NF_INET_LOCAL_OUT] = nft_nat_ipv4_local_fn, [NF_INET_LOCAL_IN] = nft_nat_ipv4_fn, }, }; static int __init nft_chain_nat_init(void) { int err; err = nft_register_chain_type(&nft_chain_nat_ipv4); if (err < 0) return err; return 0; } static void __exit nft_chain_nat_exit(void) { nft_unregister_chain_type(&nft_chain_nat_ipv4); } module_init(nft_chain_nat_init); module_exit(nft_chain_nat_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy "); MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat"); >
path: root/net/sched/sch_codel.c
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /net/sched/sch_codel.c
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'net/sched/sch_codel.c')