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Alexander Duyck 7f077afe94 net: Do not allow negative values for busy_read and busy_poll sysctl interfaces 
[ Upstream commit 95f255211396958c718aef8c45e3923b5211ea7b ]

This change basically codifies what I think was already the limitations on
the busy_poll and busy_read sysctl interfaces.  We weren't checking the
lower bounds and as such could input negative values. The behavior when
that was used was dependent on the architecture. In order to prevent any
issues with that I am just disabling support for values less than 0 since
this way we don't have to worry about any odd behaviors.

By limiting the sysctl values this way it also makes it consistent with how
we handle the SO_BUSY_POLL socket option since the value appears to be
reported as a signed integer value and negative values are rejected.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-25 14:23:41 +01:00
..
datagram.c udp: on peeking bad csum, drop packets even if not at head 2017-09-20 08:19:53 +02:00
dev.c net: Resend IGMP memberships upon peer notification. 2017-12-20 10:07:21 +01:00
dev_addr_lists.c net: fix spelling for synchronized 2014-11-18 15:26:32 -05:00
dev_ioctl.c net: Zero terminate ifr_name in dev_ifname(). 2017-08-11 08:49:32 -07:00
devlink.c devlink: add hardware messages tracing facility 2016-07-12 14:20:18 -07:00
drop_monitor.c drop_monitor: consider inserted data in genlmsg_end 2017-01-15 13:42:54 +01:00
dst.c Fix an intermittent pr_emerg warning about lo becoming free. 2017-07-05 14:40:14 +02:00
dst_cache.c net: dst_cache_per_cpu_dst_set() can be static 2016-03-18 17:45:08 -04:00
ethtool.c net: ethtool: Initialize buffer when querying device channel settings 2017-07-05 14:40:21 +02:00
fib_rules.c fib_rules: Added NLM_F_EXCL support to fib_nl_newrule 2016-06-30 08:23:19 -04:00
filter.c Revert "socket, bpf: fix possible use after free" 2017-10-12 21:21:39 +02:00
flow.c flowcache: Increase threshold for refusing new allocations 2016-11-23 06:37:09 +01:00
flow_dissector.c flow_dissector: Update pptp handling to avoid null pointer deref. 2017-01-15 13:42:54 +01:00
gen_estimator.c net: sched: do not acquire qdisc spinlock in qdisc/class stats dump 2016-06-07 16:37:14 -07:00
gen_stats.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
hwbm.c net: hwbm: Fix unbalanced spinlock in error case 2016-05-25 12:35:09 -07:00
link_watch.c dev: introduce dev_get_iflink() 2015-04-02 14:04:59 -04:00
lwtunnel.c lwtunnel: Fix oops on state free after encap module unload 2017-02-04 09:47:11 +01:00
Makefile net: add a hardware buffer management helper API 2016-03-14 12:19:46 -04:00
neighbour.c net: neigh: guard against NULL solicit() method 2017-05-03 08:36:34 -07:00
net-procfs.c net: remove NETDEV_TX_LOCKED support 2016-04-26 15:53:05 -04:00
net-sysfs.c net: introduce NETDEV_CHANGE_TX_QUEUE_LEN 2016-07-01 05:32:17 -04:00
net-sysfs.h net: netdev_kobject_init: annotate with __init 2014-01-05 20:27:54 -05:00
net-traces.c net: IPv6 fib lookup tracepoint 2015-11-22 11:54:10 -05:00
net_namespace.c net: check dead netns for peernet2id_alloc() 2016-11-17 11:19:40 -05:00
netclassid_cgroup.c cgroup, net_cls: iterate the fds of only the tasks which are being migrated 2017-03-30 09:41:27 +02:00
netevent.c netevent: remove automatic variable in register_netevent_notifier() 2015-05-31 00:03:21 -07:00
netpoll.c netpoll: Check for skb->queue_mapping 2017-05-03 08:36:36 -07:00
netprio_cgroup.c core: remove unneded headers for net cgroup controllers. 2016-02-17 15:31:27 -05:00
pktgen.c net: pktgen: remove rcu locking in pktgen_change_name() 2016-10-17 10:52:59 -04:00
ptp_classifier.c ptp: Change ptp_class to a proper bitmask 2015-11-03 11:08:22 -05:00
request_sock.c tcp: restore fastopen operations 2015-10-05 03:19:06 -07:00
rtnetlink.c net: rtnetlink: fix info leak in RTM_GETSTATS call 2017-10-12 11:51:23 +02:00
scm.c unix: correctly track in-flight fds in sending process user_struct 2016-02-08 10:30:42 -05:00
secure_seq.c net: remove a sparse error in secure_dccpv6_sequence_number() 2015-05-25 22:55:37 -04:00
skbuff.c netfilter/ipvs: clear ipvs_property flag when SKB net namespace changed 2017-11-24 08:33:40 +01:00
sock.c net: call cgroup_sk_alloc() earlier in sk_clone_lock() 2017-11-18 11:22:21 +01:00
sock_diag.c sock_diag: align nlattr properly when needed 2016-04-26 12:00:48 -04:00
sock_reuseport.c soreuseport: fix initialization race 2017-11-18 11:22:22 +01:00
stream.c net: do not export sk_stream_write_space 2016-09-28 20:32:38 -04:00
sysctl_net_core.c net: Do not allow negative values for busy_read and busy_poll sysctl interfaces 2017-12-25 14:23:41 +01:00
timestamping.c net: skb_defer_rx_timestamp should check for phydev before setting up classify 2015-07-09 14:17:15 -07:00
tso.c net: tso: add support for IPv6 2015-10-26 22:24:22 -07:00
utils.c net: the space is required before the open parenthesis '(' 2016-06-29 05:15:14 -04:00