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BUG: KASAN: user-memory-access in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: user-memory-access in atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
BUG: KASAN: user-memory-access in atomic_add_unless include/linux/atomic.h:597 [inline]
BUG: KASAN: user-memory-access in dst_hold_safe include/net/dst.h:308 [inline]
BUG: KASAN: user-memory-access in ip6_hold_safe+0xca/0x620 net/ipv6/route.c:1023
IPVS: ftp: loaded support on port[0] = 21
Read of size 4 at addr 00000000000027a0 by task syz-executor1/13108

CPU: 1 PID: 13108 Comm: syz-executor1 Not tainted 5.0.0-rc3+ #24
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
 ip6_datagram_dst_update+0x779/0xfb0 net/ipv6/datagram.c:91
kobject: 'tx-0' (000000008d589a24): kobject_add_internal: parent: 'queues', set: 'queues'
 __ip6_datagram_connect+0x5df/0x1440 net/ipv6/datagram.c:250
kobject: 'tx-0' (000000008d589a24): kobject_uevent_env
kobject: 'tx-0' (000000008d589a24): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0'
 ip6_datagram_connect+0x30/0x50 net/ipv6/datagram.c:273
 inet_dgram_connect+0x150/0x2e0 net/ipv4/af_inet.c:571
 __sys_connect+0x357/0x490 net/socket.c:1664
kobject: 'tunl0' (00000000faf0449d): kobject_add_internal: parent: 'net', set: 'devices'
kobject: 'tunl0' (00000000faf0449d): kobject_uevent_env
 __do_sys_connect net/socket.c:1675 [inline]
 __se_sys_connect net/socket.c:1672 [inline]
 __x64_sys_connect+0x73/0xb0 net/socket.c:1672
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'tunl0' (00000000faf0449d): fill_kobj_path: path = '/devices/virtual/net/tunl0'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
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:00007f9b7c8d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 000000000000001c RSI: 00000000200000c0 RDI: 0000000000000004
kobject: 'queues' (00000000c090c4b3): kobject_add_internal: parent: 'tunl0', set: '<NULL>'
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9b7c8da6d4
R13: 00000000004be4f7 R14: 00000000004ceb30 R15: 00000000ffffffff
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