Eric Dumazet 0e1d6eca51 rtnl: limit IFLA_NUM_TX_QUEUES and IFLA_NUM_RX_QUEUES to 4096 ...

We have an impressive number of syzkaller bugs that are linked
to the fact that syzbot was able to create a networking device
with millions of TX (or RX) queues.

Let's limit the number of RX/TX queues to 4096, this really should
cover all known cases.

A separate patch will add various cond_resched() in the loops
handling sysfs entries at device creation and dismantle.

Tested:

lpaa6:~# ip link add gre-4097 numtxqueues 4097 numrxqueues 4097 type ip6gretap
RTNETLINK answers: Invalid argument

lpaa6:~# time ip link add gre-4096 numtxqueues 4096 numrxqueues 4096 type ip6gretap

real	0m0.180s
user	0m0.000s
sys	0m0.107s

Fixes: 76ff5cc919 ("rtnl: allow to specify number of rx and tx queues on device creation")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2018-10-02 16:06:13 -07:00

..

datagram.c

net: simplify sock_poll_wait

2018-07-30 09:10:25 -07:00

dev_addr_lists.c

net: change the comment of dev_mc_init

2018-04-19 12:58:20 -04:00

dev_ioctl.c

net: remove redundant input checks in SIOCSIFTXQLEN case of dev_ifsioc

2018-07-24 11:36:15 -07:00

dev.c

notifier: Remove notifier header file wherever not used

2018-08-30 12:56:40 +02:00

devlink.c

devlink: double free in devlink_resource_fill()

2018-09-21 19:19:07 -07:00

drop_monitor.c

…

dst_cache.c

net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency

2018-03-05 12:52:45 -05:00

dst.c

netfilter: nf_tables: add tunnel support

2018-08-03 21:12:12 +02:00

ethtool.c

net: core: add member wol_enabled to struct net_device

2018-09-26 20:04:11 -07:00

failover.c

net: Introduce generic failover module

2018-05-28 22:59:54 -04:00

fib_notifier.c

net: Fix fib notifer to return errno

2018-03-29 14:10:30 -04:00

fib_rules.c

fib_rules: NULL check before kfree is not needed

2018-07-30 09:44:06 -07:00

filter.c

bpf: use __GFP_COMP while allocating page

2018-09-12 23:47:28 +02:00

flow_dissector.c

flow_dissector: allow dissection of tunnel options from metadata

2018-08-07 12:22:14 -07:00

gen_estimator.c

net: core: protect rate estimator statistics pointer with lock

2018-08-11 12:37:10 -07:00

gen_stats.c

gen_stats: Fix netlink stats dumping in the presence of padding

2018-07-04 14:44:45 +09:00

gro_cells.c

…

hwbm.c

…

link_watch.c

net: link_watch: mark bonding link events urgent

2018-01-23 19:43:30 -05:00

lwt_bpf.c

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

2018-08-07 11:02:05 -07:00

lwtunnel.c

…

Makefile

net: Introduce generic failover module

2018-05-28 22:59:54 -04:00

neighbour.c

neighbour: confirm neigh entries when ARP packet is received

2018-09-13 12:01:29 -07:00

net_namespace.c

Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax

2018-08-26 11:48:42 -07:00

net-procfs.c

proc: introduce proc_create_net{,_data}

2018-05-16 07:24:30 +02:00

net-sysfs.c

net: allow to call netif_reset_xps_queues() under cpus_read_lock

2018-08-09 14:25:06 -07:00

net-sysfs.h

…

net-traces.c

net/ipv6: Udate fib6_table_lookup tracepoint

2018-05-24 23:01:15 -04:00

netclassid_cgroup.c

…

netevent.c

…

netpoll.c

bond: take rcu lock in netpoll_send_skb_on_dev

2018-10-01 23:25:25 -07:00

netprio_cgroup.c

net: remove duplicate includes

2017-12-13 13:18:46 -05:00

page_pool.c

net/page_pool: Fix inconsistent lock state warning

2018-07-19 23:23:01 -07:00

pktgen.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next

2018-07-27 09:33:37 -07:00

ptp_classifier.c

…

request_sock.c

…

rtnetlink.c

rtnl: limit IFLA_NUM_TX_QUEUES and IFLA_NUM_RX_QUEUES to 4096

2018-10-02 16:06:13 -07:00

scm.c

…

secure_seq.c

infiniband: i40iw, nes: don't use wall time for TCP sequence numbers

2018-07-11 12:10:19 -06:00

skbuff.c

tcp: really ignore MSG_ZEROCOPY if no SO_ZEROCOPY

2018-09-07 23:11:06 -07:00

sock_diag.c

net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()

2018-08-14 10:01:24 -07:00

sock_reuseport.c

bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection

2018-08-11 01:58:46 +02:00

sock.c

net: avoid unnecessary sock_flag() check when enable timestamp

2018-08-06 10:42:48 -07:00

stream.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

sysctl_net_core.c

headers: untangle kmemleak.h from mm.h

2018-04-05 21:36:27 -07:00

timestamping.c

…

tso.c

…

utils.c

net: Remove some unneeded semicolon

2018-08-04 13:05:39 -07:00

xdp.c

net/xdp: Fix suspicious RCU usage warning

2018-08-16 21:55:21 +02:00