kernel/linux.git/net/ipv6/af_inet6.c, branch linux-4.13.y

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-04-27T02:39:08+00:00

Signed-off-by: David S. Miller

ipv6: move stub initialization after ipv6 setup completion

2017-04-25T15:43:16+00:00

The ipv6 stub pointer is currently initialized before the ipv6 routing subsystem: a 3rd party can access and use such stub before the routing data is ready. Moreover, such pointer is not cleared in case of initialization error, possibly leading to dangling pointers usage. This change addresses the above moving the stub initialization at the end of ipv6 init code. Fixes: 5f81bd2e5d80 ("ipv6: export a stub for IPv6 symbols used by vxlan") Signed-off-by: Paolo Abeni Acked-by: Cong Wang Signed-off-by: David S. Miller

ipv6: add support for NETDEV_RESEND_IGMP event

2017-03-29T05:02:21+00:00

This patch adds support for NETDEV_RESEND_IGMP event similar to how it works for IPv4. Signed-off-by: Vladislav Yasevich Signed-off-by: David S. Miller

ipv6: reorder icmpv6_init() and ip6_mr_init()

2017-03-07T22:57:33+00:00

Andrey reported the following kernel crash: kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 14446 Comm: syz-executor6 Not tainted 4.10.0+ #82 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88001f311700 task.stack: ffff88001f6e8000 RIP: 0010:ip6mr_sk_done+0x15a/0x3d0 net/ipv6/ip6mr.c:1618 RSP: 0018:ffff88001f6ef418 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffff10003edde8c RCX: ffffc900043ee000 RDX: 0000000000000004 RSI: ffffffff83e3b3f8 RDI: 0000000000000020 RBP: ffff88001f6ef508 R08: fffffbfff0dcc5d8 R09: 0000000000000000 R10: ffffffff86e62ec0 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88001f6ef4e0 R15: ffff8800380a0040 FS: 00007f7a52cec700(0000) GS:ffff88003ec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000061c500 CR3: 000000001f1ae000 CR4: 00000000000006f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rawv6_close+0x4c/0x80 net/ipv6/raw.c:1217 inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:432 sock_release+0x8d/0x1e0 net/socket.c:597 __sock_create+0x39d/0x880 net/socket.c:1226 sock_create_kern+0x3f/0x50 net/socket.c:1243 inet_ctl_sock_create+0xbb/0x280 net/ipv4/af_inet.c:1526 icmpv6_sk_init+0x163/0x500 net/ipv6/icmp.c:954 ops_init+0x10a/0x550 net/core/net_namespace.c:115 setup_net+0x261/0x660 net/core/net_namespace.c:291 copy_net_ns+0x27e/0x540 net/core/net_namespace.c:396 9pnet_virtio: no channels available for device ./file1 create_new_namespaces+0x437/0x9b0 kernel/nsproxy.c:106 unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:205 SYSC_unshare kernel/fork.c:2281 [inline] SyS_unshare+0x64e/0x1000 kernel/fork.c:2231 entry_SYSCALL_64_fastpath+0x1f/0xc2 This is because net->ipv6.mr6_tables is not initialized at that point, ip6mr_rules_init() is not called yet, therefore on the error path when we iterator the list, we trigger this oops. Fix this by reordering ip6mr_rules_init() before icmpv6_sk_init(). Reported-by: Andrey Konovalov Signed-off-by: Cong Wang Signed-off-by: David S. Miller

Introduce a sysctl that modifies the value of PROT_SOCK.

2017-01-24T17:10:51+00:00

Add net.ipv4.ip_unprivileged_port_start, which is a per namespace sysctl that denotes the first unprivileged inet port in the namespace. To disable all privileged ports set this to zero. It also checks for overlap with the local port range. The privileged and local range may not overlap. The use case for this change is to allow containerized processes to bind to priviliged ports, but prevent them from ever being allowed to modify their container's network configuration. The latter is accomplished by ensuring that the network namespace is not a child of the user namespace. This modification was needed to allow the container manager to disable a namespace's priviliged port restrictions without exposing control of the network namespace to processes in the user namespace. Signed-off-by: Krister Johansen Signed-off-by: David S. Miller

Replace with globally

2016-12-24T19:46:01+00:00

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

bpf: Add new cgroup attach type to enable sock modifications

2016-12-02T18:46:08+00:00

Add new cgroup based program type, BPF_PROG_TYPE_CGROUP_SOCK. Similar to BPF_PROG_TYPE_CGROUP_SKB programs can be attached to a cgroup and run any time a process in the cgroup opens an AF_INET or AF_INET6 socket. Currently only sk_bound_dev_if is exported to userspace for modification by a bpf program. This allows a cgroup to be configured such that AF_INET{6} sockets opened by processes are automatically bound to a specific device. In turn, this enables the running of programs that do not support SO_BINDTODEVICE in a specific VRF context / L3 domain. Signed-off-by: David Ahern Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller

ipv6: sr: add code base for control plane support of SR-IPv6

2016-11-10T01:40:06+00:00

This patch adds the necessary hooks and structures to provide support for SR-IPv6 control plane, essentially the Generic Netlink commands that will be used for userspace control over the Segment Routing kernel structures. The genetlink commands provide control over two different structures: tunnel source and HMAC data. The tunnel source is the source address that will be used by default when encapsulating packets into an outer IPv6 header + SRH. If the tunnel source is set to :: then an address of the outgoing interface will be selected as the source. The HMAC commands currently just return ENOTSUPP and will be implemented in a future patch. Signed-off-by: David Lebrun Signed-off-by: David S. Miller

net: inet: Support UID-based routing in IP protocols.

2016-11-04T18:45:23+00:00

- Use the UID in routing lookups made by protocol connect() and sendmsg() functions. - Make sure that routing lookups triggered by incoming packets (e.g., Path MTU discovery) take the UID of the socket into account. - For packets not associated with a userspace socket, (e.g., ping replies) use UID 0 inside the user namespace corresponding to the network namespace the socket belongs to. This allows all namespaces to apply routing and iptables rules to kernel-originated traffic in that namespaces by matching UID 0. This is better than using the UID of the kernel socket that is sending the traffic, because the UID of kernel sockets created at namespace creation time (e.g., the per-processor ICMP and TCP sockets) is the UID of the user that created the socket, which might not be mapped in the namespace. Tested: compiles allnoconfig, allyesconfig, allmodconfig Tested: https://android-review.googlesource.com/253302 Signed-off-by: Lorenzo Colitti Signed-off-by: David S. Miller

tcp: Set read_sock and peek_len proto_ops

2016-08-29T03:32:41+00:00

In inet_stream_ops we set read_sock to tcp_read_sock and peek_len to tcp_peek_len (which is just a stub function that calls tcp_inq). Signed-off-by: Tom Herbert Signed-off-by: David S. Miller