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Jason A. Donenfeld fef0035c0f netlink: do not proceed if dump's start() errs 
Drivers that use the start method for netlink dumping rely on dumpit not
being called if start fails. For example, ila_xlat.c allocates memory
and assigns it to cb->args[0] in its start() function. It might fail to
do that and return -ENOMEM instead. However, even when returning an
error, dumpit will be called, which, in the example above, quickly
dereferences the memory in cb->args[0], which will OOPS the kernel. This
is but one example of how this goes wrong.

Since start() has always been a function with an int return type, it
therefore makes sense to use it properly, rather than ignoring it. This
patch thus returns early and does not call dumpit() when start() fails.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-09-30 16:13:31 +01:00
..
6lowpan
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9p net/9p: switch p9_fd_read to kernel_write 2017-09-04 19:05:16 -04:00
802 net: introduce __skb_put_[zero, data, u8] 2017-06-20 13:30:14 -04:00
8021q net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
appletalk networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
atm net: atm: make atmdev_ops const 2017-08-09 22:43:50 -07:00
ax25 net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t 2017-07-04 22:35:19 +01:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-09 16:28:45 -07:00
bluetooth Bluetooth: Properly check L2CAP config option output buffer length 2017-09-09 17:56:05 -07:00
bpf
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bridge bridge: switchdev: Use an helper to clear forward mark 2017-09-05 11:51:47 -07:00
caif net: convert sock.sk_wmem_alloc from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
can rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
ceph libceph: don't allow bidirectional swap of pg-upmap-items 2017-09-19 20:34:29 +02:00
core net: Set sk_prot_creator when cloning sockets to the right proto 2017-09-28 10:33:22 -07:00
dcb rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
dccp net: dccp: Add handling of IPV6_PKTOPTIONS to dccp_v6_do_rcv() 2017-08-31 11:43:47 -07:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2017-09-03 17:08:42 -07:00
dns_resolver
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dsa net: dsa: Fix network device registration order 2017-09-28 10:12:53 -07:00
ethernet networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
hsr net/hsr: Check skb_put_padto() return value 2017-08-22 13:40:23 -07:00
ieee802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-05 20:03:35 -07:00
ife
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ipv4 inetpeer: fix RCU lookup() again 2017-09-28 09:39:34 -07:00
ipv6 vti: fix use after free in vti_tunnel_xmit/vti6_tnl_xmit 2017-09-26 09:58:21 -07:00
ipx net, ipx: convert ipx_route.refcnt from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
iucv iucv: Convert sk_wmem_alloc accesses to refcount_t. 2017-07-03 02:31:22 -07:00
kcm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-15 20:23:23 -07:00
l2tp l2tp: fix race condition in l2tp_tunnel_delete 2017-09-26 10:24:34 -07:00
l3mdev
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lapb net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t 2017-07-04 22:35:16 +01:00
llc net, llc: convert llc_sap.refcnt from atomic_t to refcount_t 2017-07-04 22:35:15 +01:00
mac80211 mac80211: fix deadlock in driver-managed RX BA session start 2017-09-06 15:22:02 +02:00
mac802154 net: Fix inconsistent teardown and release of private netdev state. 2017-06-07 15:53:24 -04:00
mpls rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
ncsi net/ncsi: fix ncsi_vlan_rx_{add,kill}_vid references 2017-09-05 09:11:45 -07:00
netfilter netfilter: ipset: ipset list may return wrong member count for set with timeout 2017-09-18 17:35:32 +02:00
netlabel
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netlink netlink: do not proceed if dump's start() errs 2017-09-30 16:13:31 +01:00
netrom net, netrom: convert nr_node.refcount from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
nfc NFC: Add sockaddr length checks before accessing sa_family in bind handlers 2017-06-23 00:38:31 +02:00
nsh nsh: add GSO support 2017-08-29 15:16:52 -07:00
openvswitch openvswitch: Fix an error handling path in 'ovs_nla_init_match_and_action()' 2017-09-12 20:37:31 -07:00
packet packet: only test po->has_vnet_hdr once in packet_snd 2017-09-28 10:24:31 -07:00
phonet rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
psample networking: make skb_put & friends return void pointers 2017-06-16 11:48:39 -04:00
qrtr rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
rds rds: Fix incorrect statistics counting 2017-09-07 20:07:13 -07:00
rfkill net: rfkill: gpio: Switch to devm_acpi_dev_add_driver_gpios() 2017-06-13 11:07:51 +02:00
rose
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rxrpc rxrpc: Make service connection lookup always check for retry 2017-09-05 14:39:17 -07:00
sched net_sched: remove cls_flower idr on failure 2017-09-21 15:13:52 -07:00
sctp sctp: Fix a big endian bug in sctp_diag_dump() 2017-09-26 21:16:29 -07:00
smc net/smc: no close wait in case of process shut down 2017-09-21 15:31:03 -07:00
strparser strparser: initialize all callbacks 2017-08-24 21:57:50 -07:00
sunrpc NFS client updates for Linux 4.14 2017-09-11 22:01:44 -07:00
switchdev net: switchdev: Remove bridge bypass support from switchdev 2017-08-07 14:48:48 -07:00
tipc tipc: remove unnecessary call to dev_net() 2017-09-06 21:25:52 -07:00
tls tls: make tls_sw_free_resources static 2017-09-14 09:55:21 -07:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
vmw_vsock hv_sock: implements Hyper-V transport for Virtual Sockets (AF_VSOCK) 2017-08-28 15:38:18 -07:00
wimax
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wireless nl80211: fix null-ptr dereference on invalid mesh configuration 2017-09-18 22:51:07 +02:00
x25 X25: constify null_x25_address 2017-08-03 09:13:51 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
Kconfig net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros. 2017-09-04 13:25:20 +02:00
Makefile nsh: add GSO support 2017-08-29 15:16:52 -07:00
compat.c net: compat: assert the size of cmsg copied in is as expected 2017-09-20 15:36:18 -07:00
socket.c net: fixes for skb_send_sock 2017-08-16 11:27:52 -07:00
sysctl_net.c
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