leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
94d9f1c590
linux/net
History
David Forster 94d9f1c590 ipv4: panic in leaf_walk_rcu due to stale node pointer 
Panic occurs when issuing "cat /proc/net/route" whilst
populating FIB with > 1M routes.

Use of cached node pointer in fib_route_get_idx is unsafe.

 BUG: unable to handle kernel paging request at ffffc90001630024
 IP: [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0
 PGD 11b08d067 PUD 11b08e067 PMD dac4b067 PTE 0
 Oops: 0000 [#1] SMP
 Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscac
 snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep virti
 acpi_cpufreq button parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd
tio_ring virtio floppy uhci_hcd ehci_hcd usbcore usb_common libata scsi_mod
 CPU: 1 PID: 785 Comm: cat Not tainted 4.2.0-rc8+ #4
 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
 task: ffff8800da1c0bc0 ti: ffff88011a05c000 task.ti: ffff88011a05c000
 RIP: 0010:[<ffffffff814cf6a0>]  [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0
 RSP: 0018:ffff88011a05fda0  EFLAGS: 00010202
 RAX: ffff8800d8a40c00 RBX: ffff8800da4af940 RCX: ffff88011a05ff20
 RDX: ffffc90001630020 RSI: 0000000001013531 RDI: ffff8800da4af950
 RBP: 0000000000000000 R08: ffff8800da1f9a00 R09: 0000000000000000
 R10: ffff8800db45b7e4 R11: 0000000000000246 R12: ffff8800da4af950
 R13: ffff8800d97a74c0 R14: 0000000000000000 R15: ffff8800d97a7480
 FS:  00007fd3970e0700(0000) GS:ffff88011fd00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: ffffc90001630024 CR3: 000000011a7e4000 CR4: 00000000000006e0
 Stack:
  ffffffff814d00d3 0000000000000000 ffff88011a05ff20 ffff8800da1f9a00
  ffffffff811dd8b9 0000000000000800 0000000000020000 00007fd396f35000
  ffffffff811f8714 0000000000003431 ffffffff8138dce0 0000000000000f80
 Call Trace:
  [<ffffffff814d00d3>] ? fib_route_seq_start+0x93/0xc0
  [<ffffffff811dd8b9>] ? seq_read+0x149/0x380
  [<ffffffff811f8714>] ? fsnotify+0x3b4/0x500
  [<ffffffff8138dce0>] ? process_echoes+0x70/0x70
  [<ffffffff8121cfa7>] ? proc_reg_read+0x47/0x70
  [<ffffffff811bb823>] ? __vfs_read+0x23/0xd0
  [<ffffffff811bbd42>] ? rw_verify_area+0x52/0xf0
  [<ffffffff811bbe61>] ? vfs_read+0x81/0x120
  [<ffffffff811bcbc2>] ? SyS_read+0x42/0xa0
  [<ffffffff81549ab2>] ? entry_SYSCALL_64_fastpath+0x16/0x75
 Code: 48 85 c0 75 d8 f3 c3 31 c0 c3 f3 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00
a 04 89 f0 33 02 44 89 c9 48 d3 e8 0f b6 4a 05 49 89
 RIP  [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0
  RSP <ffff88011a05fda0>
 CR2: ffffc90001630024

Signed-off-by: Dave Forster <dforster@brocade.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-06 00:10:05 -04:00
..
6lowpan 6lowpan: ndisc: set invalid unicast short addr to unspec 2016-07-08 13:23:12 +02:00
9p remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
802
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
appletalk
atm net: add dev arg to ndo_neigh_construct/destroy 2016-07-05 09:06:28 -07:00
ax25 AX.25: Close socket connection on session completion 2016-06-18 20:55:34 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
bluetooth Bluetooth: Add debugfs fields for hardware and firmware info 2016-07-18 09:33:28 +03:00
bridge bridge: Fix incorrect re-injection of LLDP packets 2016-07-25 10:53:34 -07:00
caif caif: Remove unneeded header file 2016-06-28 05:26:14 -04:00
can can: only call can_stat_update with procfs 2016-06-23 11:23:49 +02:00
ceph libceph: fsmap.user subscription support 2016-07-28 03:00:40 +02:00
core Merge branch 'salted-string-hash' 2016-07-28 12:26:31 -07:00
dcb
dccp Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2016-07-29 17:38:46 -07:00
decnet net: fix decnet rtnexthop parsing 2016-07-05 14:08:47 -07:00
dns_resolver
dsa net: dsa: support switchdev ageing time attr 2016-07-19 19:42:01 -07:00
ethernet
hsr net/hsr: Use setup_timer and mod_timer. 2016-05-16 14:00:43 -04:00
ieee802154 ieee802154: 6lowpan: fix intra pan id check 2016-07-08 13:23:12 +02:00
ipv4 ipv4: panic in leaf_walk_rcu due to stale node pointer 2016-08-06 00:10:05 -04:00
ipv6 net: ipv6: use list_move instead of list_del/list_add 2016-07-30 20:41:59 -07:00
ipx
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
iucv Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2016-07-29 17:38:46 -07:00
kcm kcm: remove redundant -ve error check and return path 2016-07-25 11:17:16 -07:00
key
l2tp l2tp: Correctly return -EBADF from pppol2tp_getname. 2016-07-26 15:19:46 -07:00
l3mdev net: vrf: Implement get_saddr for IPv6 2016-06-17 21:25:29 -07:00
lapb net/lapb: tuse %*ph to dump buffers 2016-05-29 22:33:25 -07:00
llc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
mac80211 cfg80211: Add mesh peer AID setting API 2016-07-06 15:04:52 +02:00
mac802154
mpls mpls: allow routes on ipip and sit devices 2016-07-09 17:45:56 -04:00
ncsi net/ncsi: avoid maybe-uninitialized warning 2016-07-25 10:32:59 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
netlabel netlabel: Implement CALIPSO config functions for SMACK. 2016-06-27 15:06:18 -04:00
netlink net/netlink/af_netlink.h: Remove unused structure. 2016-06-09 22:26:24 -07:00
netrom
nfc NFC: digital: Fix RTOX supervisor PDU handling 2016-07-11 02:02:03 +02:00
openvswitch OVS: Ignore negative headroom value 2016-08-06 00:06:11 -04:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
phonet
qrtr Merge tag 'qcom-soc-for-4.7-2' into net-next 2016-05-17 14:11:19 -04:00
rds RDS: TCP: Enable multipath RDS for TCP 2016-07-15 11:36:58 -07:00
rfkill
rose rose: limit sk_filter trim to payload 2016-07-13 11:53:40 -07:00
rxrpc rxrpc: Fix races between skb free, ACK generation and replying 2016-08-06 00:08:40 -04:00
sched net_sched: get rid of struct tcf_common 2016-07-25 21:49:20 -07:00
sctp sctp: allow receiving msg when TCP-style sk is in CLOSED state 2016-07-30 22:06:22 -07:00
sunrpc NFS client updates for Linux 4.8 2016-07-30 16:33:25 -07:00
switchdev net/switchdev: Export the same parent ID service function 2016-07-14 13:34:29 -07:00
tipc tipc: fix imbalance read_unlock_bh in __tipc_nl_add_monitor() 2016-07-30 20:38:22 -07:00
unix af_unix: charge buffers to kmemcg 2016-07-26 16:19:19 -07:00
vmw_vsock vsock: make listener child lock ordering explicit 2016-06-27 10:44:46 -04:00
wimax
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
x25 net: fix a kernel infoleak in x25 module 2016-05-09 22:45:33 -04:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
compat.c packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
Kconfig net/ncsi: Resource management 2016-07-19 20:49:16 -07:00
Makefile net/ncsi: Resource management 2016-07-19 20:49:16 -07:00
socket.c fs: poll/select/recvmmsg: use timespec64 for timeout events 2016-05-19 19:12:14 -07:00
sysctl_net.c net: Use ns_capable_noaudit() when determining net sysctl permissions 2016-06-06 20:16:22 +10:00