================================================================== BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:194 [inline] BUG: KASAN: slab-out-of-bounds in ip6_dst_lookup_tail+0x1abd/0x1b30 net/ipv6/ip6_output.c:970 Read of size 8 at addr ffff88808e408762 by task ksoftirqd/1/16 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.2.0-rc1+ #2 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 kasan_report+0x12/0x20 mm/kasan/common.c:614 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __read_once_size include/linux/compiler.h:194 [inline] ip6_dst_lookup_tail+0x1abd/0x1b30 net/ipv6/ip6_output.c:970 ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1094 sctp_v6_get_dst+0x785/0x1d80 net/sctp/ipv6.c:293 sctp_transport_route+0x12d/0x360 net/sctp/transport.c:312 sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:678 sctp_process_param net/sctp/sm_make_chunk.c:2546 [inline] sctp_process_init+0x2491/0x2b10 net/sctp/sm_make_chunk.c:2359 sctp_sf_do_5_1B_init+0x8ba/0xe50 net/sctp/sm_statefuns.c:416 sctp_do_sm+0x121/0x50e0 net/sctp/sm_sideeffect.c:1162 sctp_endpoint_bh_rcv+0x451/0x950 net/sctp/endpointola.c:458 sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:95 sctp_rcv+0x282e/0x35e0 net/sctp/input.c:271 sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1064 ip6_protocol_deliver_rcu+0x2fe/0x16c0 net/ipv6/ip6_input.c:401 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:442 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:451 dst_input include/net/dst.h:439 [inline] ip6_rcv_finish+0x1de/0x310 net/ipv6/ip6_input.c:80 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:276 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4990 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 process_backlog+0x206/0x750 net/core/dev.c:5944 napi_poll net/core/dev.c:6367 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6433 __do_softirq+0x25c/0x94c kernel/softirq.c:293 run_ksoftirqd kernel/softirq.c:604 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:596 smpboot_thread_fn+0x6a3/0xa30 kernel/smpboot.c:165 kthread+0x354/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 11411: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc mm/slab.c:3326 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3488 dst_alloc+0x10e/0x200 net/core/dst.c:93 ip6_dst_alloc+0x34/0xa0 net/ipv6/route.c:356 ip6_rt_pcpu_alloc net/ipv6/route.c:1257 [inline] rt6_make_pcpu_route net/ipv6/route.c:1287 [inline] ip6_pol_route+0x656/0x1050 net/ipv6/route.c:2031 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2204 fib6_rule_lookup+0x133/0x5a0 net/ipv6/fib6_rules.c:116 ip6_route_output_flags+0x2c4/0x350 net/ipv6/route.c:2233 ip6_route_output include/net/ip6_route.h:89 [inline] ip6_dst_lookup_tail+0xd10/0x1b30 net/ipv6/ip6_output.c:966 ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1094 sctp_v6_get_dst+0x785/0x1d80 net/sctp/ipv6.c:293 sctp_transport_route+0x12d/0x360 net/sctp/transport.c:312 sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:678 sctp_process_param net/sctp/sm_make_chunk.c:2546 [inline] sctp_process_init+0x2491/0x2b10 net/sctp/sm_make_chunk.c:2359 sctp_sf_do_5_1B_init+0x8ba/0xe50 net/sctp/sm_statefuns.c:416 sctp_do_sm+0x121/0x50e0 net/sctp/sm_sideeffect.c:1162 sctp_endpoint_bh_rcv+0x451/0x950 net/sctp/endpointola.c:458 sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:95 sctp_rcv+0x282e/0x35e0 net/sctp/input.c:271 sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1064 ip6_protocol_deliver_rcu+0x2fe/0x16c0 net/ipv6/ip6_input.c:401 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:442 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:451 dst_input include/net/dst.h:439 [inline] ip6_rcv_finish+0x1de/0x310 net/ipv6/ip6_input.c:80 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:276 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4990 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 process_backlog+0x206/0x750 net/core/dev.c:5944 napi_poll net/core/dev.c:6367 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6433 __do_softirq+0x25c/0x94c kernel/softirq.c:293 Freed by task 22: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459 __cache_free mm/slab.c:3432 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3698 dst_destroy+0x29e/0x3c0 net/core/dst.c:129 dst_destroy_rcu+0x16/0x19 net/core/dst.c:142 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2092 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2310 [inline] rcu_core+0xba5/0x1500 kernel/rcu/tree.c:2291 __do_softirq+0x25c/0x94c kernel/softirq.c:293 The buggy address belongs to the object at ffff88808e408680 which belongs to the cache ip6_dst_cache of size 224 The buggy address is located 2 bytes to the right of 224-byte region [ffff88808e408680, ffff88808e408760) The buggy address belongs to the page: page:ffffea0002390200 refcount:1 mapcount:0 mapping:ffff88821651b3c0 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea000291c488 ffffea0002a3b448 ffff88821651b3c0 raw: 0000000000000000 ffff88808e408040 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808e408600: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ffff88808e408680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808e408700: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff88808e408780: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88808e408800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================