user/sven/linux.git/net/key, branch v4.9.53

af_key: do not use GFP_KERNEL in atomic contexts

2017-08-30T08:21:38Z

[ Upstream commit 36f41f8fc6d8aa9f8c9072d66ff7cf9055f5e69b ] pfkey_broadcast() might be called from non process contexts, we can not use GFP_KERNEL in these cases [1]. This patch partially reverts commit ba51b6be38c1 ("net: Fix RCU splat in af_key"), only keeping the GFP_ATOMIC forcing under rcu_read_lock() section. [1] : syzkaller reported : in_atomic(): 1, irqs_disabled(): 0, pid: 2932, name: syzkaller183439 3 locks held by syzkaller183439/2932: #0: (&net->xfrm.xfrm_cfg_mutex){+.+.+.}, at: [] pfkey_sendmsg+0x4c8/0x9f0 net/key/af_key.c:3649 #1: (&pfk->dump_lock){+.+.+.}, at: [] pfkey_do_dump+0x76/0x3f0 net/key/af_key.c:293 #2: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [] spin_lock_bh include/linux/spinlock.h:304 [inline] #2: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [] xfrm_policy_walk+0x192/0xa30 net/xfrm/xfrm_policy.c:1028 CPU: 0 PID: 2932 Comm: syzkaller183439 Not tainted 4.13.0-rc4+ #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:5994 __might_sleep+0x95/0x190 kernel/sched/core.c:5947 slab_pre_alloc_hook mm/slab.h:416 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x24b/0x6e0 mm/slab.c:3559 skb_clone+0x1a0/0x400 net/core/skbuff.c:1037 pfkey_broadcast_one+0x4b2/0x6f0 net/key/af_key.c:207 pfkey_broadcast+0x4ba/0x770 net/key/af_key.c:281 dump_sp+0x3d6/0x500 net/key/af_key.c:2685 xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1042 pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2695 pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299 pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2722 pfkey_process+0x606/0x710 net/key/af_key.c:2814 pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3650 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 ___sys_sendmsg+0x755/0x890 net/socket.c:2035 __sys_sendmsg+0xe5/0x210 net/socket.c:2069 SYSC_sendmsg net/socket.c:2080 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2076 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x445d79 RSP: 002b:00007f32447c1dc8 EFLAGS: 00000202 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445d79 RDX: 0000000000000000 RSI: 000000002023dfc8 RDI: 0000000000000008 RBP: 0000000000000086 R08: 00007f32447c2700 R09: 00007f32447c2700 R10: 00007f32447c2700 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe33edec4f R14: 00007f32447c29c0 R15: 0000000000000000 Fixes: ba51b6be38c1 ("net: Fix RCU splat in af_key") Signed-off-by: Eric Dumazet Reported-by: Dmitry Vyukov Cc: David Ahern Acked-by: David Ahern Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

af_key: Add lock to key dump

2017-08-07T01:59:39Z

commit 89e357d83c06b6fac581c3ca7f0ee3ae7e67109e upstream. A dump may come in the middle of another dump, modifying its dump structure members. This race condition will result in NULL pointer dereference in kernel. So add a lock to prevent that race. Fixes: 83321d6b9872 ("[AF_KEY]: Dump SA/SP entries non-atomically") Signed-off-by: Yuejie Shi Signed-off-by: Steffen Klassert Signed-off-by: Mark Salyzyn Signed-off-by: Greg Kroah-Hartman

af_key: Fix sadb_x_ipsecrequest parsing

2017-07-27T22:08:00Z

commit 096f41d3a8fcbb8dde7f71379b1ca85fe213eded upstream. The parsing of sadb_x_ipsecrequest is broken in a number of ways. First of all we're not verifying sadb_x_ipsecrequest_len. This is needed when the structure carries addresses at the end. Worse we don't even look at the length when we parse those optional addresses. The migration code had similar parsing code that's better but it also has some deficiencies. The length is overcounted first of all as it includes the header itself. It also fails to check the length before dereferencing the sa_family field. This patch fixes those problems in parse_sockaddr_pair and then uses it in parse_ipsecrequest. Reported-by: Andrey Konovalov Signed-off-by: Herbert Xu Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman

xfrm: Oops on error in pfkey_msg2xfrm_state()

2017-07-05T12:40:28Z

commit 1e3d0c2c70cd3edb5deed186c5f5c75f2b84a633 upstream. There are some missing error codes here so we accidentally return NULL instead of an error pointer. It results in a NULL pointer dereference. Fixes: df71837d5024 ("[LSM-IPSec]: Security association restriction.") Signed-off-by: Dan Carpenter Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman

xfrm: NULL dereference on allocation failure

2017-07-05T12:40:28Z

commit e747f64336fc15e1c823344942923195b800aa1e upstream. The default error code in pfkey_msg2xfrm_state() is -ENOBUFS. We added a new call to security_xfrm_state_alloc() which sets "err" to zero so there several places where we can return ERR_PTR(0) if kmalloc() fails. The caller is expecting error pointers so it leads to a NULL dereference. Fixes: df71837d5024 ("[LSM-IPSec]: Security association restriction.") Signed-off-by: Dan Carpenter Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman

af_key: fix two typos

2015-10-23T10:05:19Z

Signed-off-by: Li RongQing Signed-off-by: David S. Miller

net: Fix RCU splat in af_key

2015-08-24T21:48:10Z

Hit the following splat testing VRF change for ipsec: [ 113.475692] =============================== [ 113.476194] [ INFO: suspicious RCU usage. ] [ 113.476667] 4.2.0-rc6-1+deb7u2+clUNRELEASED #3.2.65-1+deb7u2+clUNRELEASED Not tainted [ 113.477545] ------------------------------- [ 113.478013] /work/monster-14/dsa/kernel.git/include/linux/rcupdate.h:568 Illegal context switch in RCU read-side critical section! [ 113.479288] [ 113.479288] other info that might help us debug this: [ 113.479288] [ 113.480207] [ 113.480207] rcu_scheduler_active = 1, debug_locks = 1 [ 113.480931] 2 locks held by setkey/6829: [ 113.481371] #0: (&net->xfrm.xfrm_cfg_mutex){+.+.+.}, at: [] pfkey_sendmsg+0xfb/0x213 [ 113.482509] #1: (rcu_read_lock){......}, at: [] rcu_read_lock+0x0/0x6e [ 113.483509] [ 113.483509] stack backtrace: [ 113.484041] CPU: 0 PID: 6829 Comm: setkey Not tainted 4.2.0-rc6-1+deb7u2+clUNRELEASED #3.2.65-1+deb7u2+clUNRELEASED [ 113.485422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014 [ 113.486845] 0000000000000001 ffff88001d4c7a98 ffffffff81518af2 ffffffff81086962 [ 113.487732] ffff88001d538480 ffff88001d4c7ac8 ffffffff8107ae75 ffffffff8180a154 [ 113.488628] 0000000000000b30 0000000000000000 00000000000000d0 ffff88001d4c7ad8 [ 113.489525] Call Trace: [ 113.489813] [] dump_stack+0x4c/0x65 [ 113.490389] [] ? console_unlock+0x3d6/0x405 [ 113.491039] [] lockdep_rcu_suspicious+0xfa/0x103 [ 113.491735] [] rcu_preempt_sleep_check+0x45/0x47 [ 113.492442] [] ___might_sleep+0x19/0x1c8 [ 113.493077] [] __might_sleep+0x6c/0x82 [ 113.493681] [] cache_alloc_debugcheck_before.isra.50+0x1d/0x24 [ 113.494508] [] kmem_cache_alloc+0x31/0x18f [ 113.495149] [] skb_clone+0x64/0x80 [ 113.495712] [] pfkey_broadcast_one+0x3d/0xff [ 113.496380] [] pfkey_broadcast+0xb5/0x11e [ 113.497024] [] pfkey_register+0x191/0x1b1 [ 113.497653] [] pfkey_process+0x162/0x17e [ 113.498274] [] pfkey_sendmsg+0x109/0x213 In pfkey_sendmsg the net mutex is taken and then pfkey_broadcast takes the RCU lock. Since pfkey_broadcast takes the RCU lock the allocation argument is pointless since GFP_ATOMIC must be used between the rcu_read_{,un}lock. The one call outside of rcu can be done with GFP_KERNEL. Fixes: 7f6b9dbd5afbd ("af_key: locking change") Signed-off-by: David Ahern Acked-by: Eric Dumazet Signed-off-by: David S. Miller

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

2015-06-24T23:49:49Z

Pull networking updates from David Miller: 1) Add TX fast path in mac80211, from Johannes Berg. 2) Add TSO/GRO support to ibmveth, from Thomas Falcon 3) Move away from cached routes in ipv6, just like ipv4, from Martin KaFai Lau. 4) Lots of new rhashtable tests, from Thomas Graf. 5) Run ingress qdisc lockless, from Alexei Starovoitov. 6) Allow servers to fetch TCP packet headers for SYN packets of new connections, for fingerprinting. From Eric Dumazet. 7) Add mode parameter to pktgen, for testing receive. From Alexei Starovoitov. 8) Cache access optimizations via simplifications of build_skb(), from Alexander Duyck. 9) Move page frag allocator under mm/, also from Alexander. 10) Add xmit_more support to hv_netvsc, from KY Srinivasan. 11) Add a counter guard in case we try to perform endless reclassify loops in the packet scheduler. 12) Extern flow dissector to be programmable and use it in new "Flower" classifier. From Jiri Pirko. 13) AF_PACKET fanout rollover fixes, performance improvements, and new statistics. From Willem de Bruijn. 14) Add netdev driver for GENEVE tunnels, from John W Linville. 15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso. 16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet. 17) Add an ECN retry fallback for the initial TCP handshake, from Daniel Borkmann. 18) Add tail call support to BPF, from Alexei Starovoitov. 19) Add several pktgen helper scripts, from Jesper Dangaard Brouer. 20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa. 21) Favor even port numbers for allocation to connect() requests, and odd port numbers for bind(0), in an effort to help avoid ip_local_port_range exhaustion. From Eric Dumazet. 22) Add Cavium ThunderX driver, from Sunil Goutham. 23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata, from Alexei Starovoitov. 24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai. 25) Double TCP Small Queues default to 256K to accomodate situations like the XEN driver and wireless aggregation. From Wei Liu. 26) Add more entropy inputs to flow dissector, from Tom Herbert. 27) Add CDG congestion control algorithm to TCP, from Kenneth Klette Jonassen. 28) Convert ipset over to RCU locking, from Jozsef Kadlecsik. 29) Track and act upon link status of ipv4 route nexthops, from Andy Gospodarek. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits) bridge: vlan: flush the dynamically learned entries on port vlan delete bridge: multicast: add a comment to br_port_state_selection about blocking state net: inet_diag: export IPV6_V6ONLY sockopt stmmac: troubleshoot unexpected bits in des0 & des1 net: ipv4 sysctl option to ignore routes when nexthop link is down net: track link-status of ipv4 nexthops net: switchdev: ignore unsupported bridge flags net: Cavium: Fix MAC address setting in shutdown state drivers: net: xgene: fix for ACPI support without ACPI ip: report the original address of ICMP messages net/mlx5e: Prefetch skb data on RX net/mlx5e: Pop cq outside mlx5e_get_cqe net/mlx5e: Remove mlx5e_cq.sqrq back-pointer net/mlx5e: Remove extra spaces net/mlx5e: Avoid TX CQE generation if more xmit packets expected net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq() net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device ...

ipsec: Add IV generator information to xfrm_state

2015-05-28T03:23:20Z

This patch adds IV generator information to xfrm_state. This is currently obtained from our own list of algorithm descriptions. Signed-off-by: Herbert Xu

net: Pass kern from net_proto_family.create to sk_alloc

2015-05-11T14:50:17Z

In preparation for changing how struct net is refcounted on kernel sockets pass the knowledge that we are creating a kernel socket from sock_create_kern through to sk_alloc. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller