audit: type=1800 audit(1548167291.149:120): pid=2981 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor1" name="cpuset.memory_pressure" dev="sda1" ino=16514 res=0
IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: null-ptr-deref in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: null-ptr-deref in atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
BUG: KASAN: null-ptr-deref in atomic_add_unless include/linux/atomic.h:597 [inline]
BUG: KASAN: null-ptr-deref in dst_hold_safe include/net/dst.h:308 [inline]
BUG: KASAN: null-ptr-deref in ip6_hold_safe+0xca/0x620 net/ipv6/route.c:1023
Read of size 4 at addr 0000000000000171 by task syz-executor0/2986
CPU: 1 PID: 2986 Comm: syz-executor0 Not tainted 5.0.0-rc3+ #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
kasan_report.cold+0x5/0x40 mm/kasan/report.c:321
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x123/0x190 mm/kasan/generic.c:191
kasan_check_read+0x11/0x20 mm/kasan/common.c:100
atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
atomic_add_unless include/linux/atomic.h:597 [inline]
dst_hold_safe include/net/dst.h:308 [inline]
ip6_hold_safe+0xca/0x620 net/ipv6/route.c:1023
rt6_get_pcpu_route net/ipv6/route.c:1243 [inline]
ip6_pol_route+0x3a3/0x1490 net/ipv6/route.c:1892
ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2068
fib6_rule_lookup+0x12f/0x870 net/ipv6/fib6_rules.c:118
ip6_route_output_flags+0x2c4/0x350 net/ipv6/route.c:2097
ip6_route_output include/net/ip6_route.h:88 [inline]
ip6_dst_lookup_tail+0xe18/0x1d50 net/ipv6/ip6_output.c:958
ip6_dst_lookup_flow+0xca/0x270 net/ipv6/ip6_output.c:1086
sctp_v6_get_dst+0x7d5/0x2240 net/sctp/ipv6.c:292
sctp_transport_route+0x132/0x370 net/sctp/transport.c:311
sctp_assoc_add_peer+0x5f7/0x10e0 net/sctp/associola.c:678
sctp_process_param net/sctp/sm_make_chunk.c:2543 [inline]
sctp_process_init+0xe63/0x2910 net/sctp/sm_make_chunk.c:2356
sctp_sf_do_5_1B_init+0x908/0xf80 net/sctp/sm_statefuns.c:416
sctp_do_sm+0x197/0x7020 net/sctp/sm_sideeffect.c:1188
sctp_endpoint_bh_rcv+0x471/0x9b0 net/sctp/endpointola.c:456
sctp_inq_push+0x288/0x3a0 net/sctp/inqueue.c:95
sctp_rcv+0x2cef/0x4010 net/sctp/input.c:271
sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1062
ip6_protocol_deliver_rcu+0x3aa/0x1940 net/ipv6/ip6_input.c:394
ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip6_input+0xf9/0x600 net/ipv6/ip6_input.c:443
dst_input include/net/dst.h:450 [inline]
ip6_rcv_finish+0x177/0x330 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ipv6_rcv+0x113/0x650 net/ipv6/ip6_input.c:272
__netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
process_backlog+0x206/0x750 net/core/dev.c:5923
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x76d/0x1930 net/core/dev.c:6412
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
kobject: 'queues' (000000001248f9d9): kobject_uevent_env: filter function caused the event to drop!
kobject: 'rx-0' (000000000642a258): kobject_add_internal: parent: 'queues', set: 'queues'
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027
do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337
do_softirq kernel/softirq.c:329 [inline]
__local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline]
ip6_finish_output2+0xca9/0x28e0 net/ipv6/ip6_output.c:121
kobject: 'rx-0' (000000000642a258): kobject_uevent_env
kobject: 'rx-0' (000000000642a258): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/rx-0'
ip6_finish_output+0x577/0xc30 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x23c/0xa00 net/ipv6/ip6_output.c:171
kobject: 'tx-0' (00000000db2f924d): kobject_add_internal: parent: 'queues', set: 'queues'
dst_output include/net/dst.h:444 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip6_xmit+0xee1/0x24a0 net/ipv6/ip6_output.c:275
kobject: 'tx-0' (00000000db2f924d): kobject_uevent_env
sctp_v6_xmit+0x3bf/0x780 net/sctp/ipv6.c:232
kobject: 'tx-0' (00000000db2f924d): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/tx-0'
sctp_packet_transmit+0x1e49/0x3be0 net/sctp/output.c:641
kobject: 'gretap0' (0000000056a1ce04): kobject_add_internal: parent: 'net', set: 'devices'
kobject: 'gretap0' (0000000056a1ce04): kobject_uevent_env
sctp_packet_singleton net/sctp/outqueue.c:787 [inline]
sctp_outq_flush_ctrl.constprop.0+0x7c9/0xe50 net/sctp/outqueue.c:918
kobject: 'gretap0' (0000000056a1ce04): fill_kobj_path: path = '/devices/virtual/net/gretap0'
sctp_outq_flush+0x290/0x3580 net/sctp/outqueue.c:1200
kobject: 'queues' (00000000a3d0ebb2): kobject_add_internal: parent: 'gretap0', set: ''
kobject: 'queues' (00000000a3d0ebb2): kobject_uevent_env
kobject: 'queues' (00000000a3d0ebb2): kobject_uevent_env: filter function caused the event to drop!
kobject: 'rx-0' (00000000d9c86b0e): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'rx-0' (00000000d9c86b0e): kobject_uevent_env
sctp_outq_uncork+0x6c/0x80 net/sctp/outqueue.c:772
kobject: 'rx-0' (00000000d9c86b0e): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/rx-0'
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
sctp_do_sm+0x624/0x7020 net/sctp/sm_sideeffect.c:1191
kobject: 'tx-0' (00000000535f3516): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'tx-0' (00000000535f3516): kobject_uevent_env
kobject: 'tx-0' (00000000535f3516): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/tx-0'
kobject: 'batman_adv' (00000000367c168f): kobject_add_internal: parent: 'gretap0', set: ''
sctp_primitive_ASSOCIATE+0x9d/0xd0 net/sctp/primitive.c:88
sctp_sendmsg_to_asoc+0x57f/0x1ad0 net/sctp/socket.c:1923
kobject: 'erspan0' (00000000b4d2381e): kobject_add_internal: parent: 'net', set: 'devices'
sctp_sendmsg+0x892/0x1dc0 net/sctp/socket.c:2113
kobject: 'erspan0' (00000000b4d2381e): kobject_uevent_env
kobject: 'erspan0' (00000000b4d2381e): fill_kobj_path: path = '/devices/virtual/net/erspan0'
inet_sendmsg+0x1af/0x740 net/ipv4/af_inet.c:798
kobject: 'queues' (0000000084a5e946): kobject_add_internal: parent: 'erspan0', set: ''
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:631
kobject: 'queues' (0000000084a5e946): kobject_uevent_env
__sys_sendto+0x387/0x5f0 net/socket.c:1788
kobject: 'queues' (0000000084a5e946): kobject_uevent_env: filter function caused the event to drop!
kobject: 'rx-0' (00000000fdf05ce6): kobject_add_internal: parent: 'queues', set: 'queues'
__do_sys_sendto net/socket.c:1800 [inline]
__se_sys_sendto net/socket.c:1796 [inline]
__x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'rx-0' (00000000fdf05ce6): kobject_uevent_env
entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'rx-0' (00000000fdf05ce6): fill_kobj_path: path = '/devices/virtual/net/erspan0/queues/rx-0'
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb7d9efac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458099
RDX: 0000000000000001 RSI: 0000000020e33fe0 RDI: 0000000000000007
RBP: 000000000073bfa0 R08: 000000002005ffe4 R09: 000000000000001c
kobject: 'tx-0' (000000005ccf482f): kobject_add_internal: parent: 'queues', set: 'queues'
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb7d9efb6d4
R13: 00000000004c568c R14: 00000000004d9358 R15: 00000000ffffffff
==================================================================