[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.665574] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.674392] random: sshd: uninitialized urandom read (32 bytes read) [ 26.122607] random: sshd: uninitialized urandom read (32 bytes read) [ 26.985951] random: sshd: uninitialized urandom read (32 bytes read) [ 27.136957] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. [ 32.910107] random: sshd: uninitialized urandom read (32 bytes read) [ 32.999417] IPVS: ftp: loaded support on port[0] = 21 [ 33.111664] bridge0: port 1(bridge_slave_0) entered blocking state [ 33.118100] bridge0: port 1(bridge_slave_0) entered disabled state [ 33.125405] device bridge_slave_0 entered promiscuous mode [ 33.140140] bridge0: port 2(bridge_slave_1) entered blocking state [ 33.146483] bridge0: port 2(bridge_slave_1) entered disabled state [ 33.153486] device bridge_slave_1 entered promiscuous mode [ 33.168209] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.182645] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.219389] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 33.235684] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 33.294623] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 33.302746] team0: Port device team_slave_0 added [ 33.315914] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 33.322969] team0: Port device team_slave_1 added [ 33.336788] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 33.352803] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 33.368549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 33.384610] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 33.485740] bridge0: port 2(bridge_slave_1) entered blocking state [ 33.492195] bridge0: port 2(bridge_slave_1) entered forwarding state [ 33.499219] bridge0: port 1(bridge_slave_0) entered blocking state [ 33.505571] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 33.854844] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 33.860988] 8021q: adding VLAN 0 to HW filter on device bond0 [ 33.898725] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 33.935055] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 33.943110] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 33.978660] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 33.984737] 8021q: adding VLAN 0 to HW filter on device team0 [ 34.064443] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.461591] dst_release: dst:(____ptrval____) refcnt:-1 [ 35.467134] dst_release: dst:(____ptrval____) refcnt:-2 [ 35.472591] dst_release: dst:(____ptrval____) refcnt:-3 [ 35.478047] dst_release: dst:(____ptrval____) refcnt:-4 [ 35.483515] dst_release: dst:(____ptrval____) refcnt:-5 [ 35.488909] dst_release: dst:(____ptrval____) refcnt:-6 [ 35.494373] dst_release: dst:(____ptrval____) refcnt:-7 [ 35.499908] dst_release: dst:(____ptrval____) refcnt:-8 [ 35.505312] dst_release: dst:(____ptrval____) refcnt:-9 executing program [ 35.510821] dst_release: dst:(____ptrval____) refcnt:-10 [ 35.522121] ================================================================== [ 35.529545] BUG: KASAN: use-after-free in dst_release+0x2a/0xb0 [ 35.535586] Write of size 4 at addr ffff8801c86e9900 by task syz-executor087/4814 [ 35.543179] [ 35.544800] CPU: 0 PID: 4814 Comm: syz-executor087 Not tainted 4.18.0-rc7+ #172 [ 35.549455] kasan: CONFIG_KASAN_INLINE enabled [ 35.552263] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.552270] Call Trace: [ 35.552275] [ 35.552292] dump_stack+0x1c9/0x2b4 [ 35.552307] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.552325] ? printk+0xa7/0xcf [ 35.556964] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.566270] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 35.566286] ? dst_release+0x2a/0xb0 [ 35.566299] print_address_description+0x6c/0x20b [ 35.566315] ? dst_release+0x2a/0xb0 [ 35.568913] general protection fault: 0000 [#1] SMP KASAN [ 35.571021] kasan_report.cold.7+0x242/0x2fe [ 35.574639] CPU: 1 PID: 4815 Comm: syz-executor087 Not tainted 4.18.0-rc7+ #172 [ 35.579830] check_memory_region+0x13e/0x1b0 [ 35.583082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.590430] kasan_check_write+0x14/0x20 [ 35.595197] RIP: 0010:ip6_dst_hoplimit+0x3b5/0x4d0 [ 35.598882] dst_release+0x2a/0xb0 [ 35.603697] Code: [ 35.607410] inet_sock_destruct+0x6ae/0x9c0 [ 35.612920] 80 [ 35.617315] ? ipv4_mib_init_net+0x580/0x580 [ 35.624735] 3c [ 35.629144] ? save_stack+0xa9/0xd0 [ 35.638489] 02 [ 35.642549] ? save_stack+0x43/0xd0 [ 35.647461] 00 [ 35.650995] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.653114] 0f [ 35.657422] ? udp_rmem_release+0x323/0x490 [ 35.659291] 85 [ 35.663701] ? sock_sendmsg+0xd5/0x120 [ 35.665561] 2e [ 35.669177] ? ___sys_sendmsg+0x51d/0x930 [ 35.671047] 01 [ 35.674681] udp_destruct_sock+0x350/0x4a0 [ 35.676537] 00 [ 35.682060] ? udp_skb_dtor_locked+0x70/0x70 [ 35.683922] 00 [ 35.688230] l2tp_tunnel_destruct+0x174/0x290 [ 35.690095] 4d [ 35.693980] ? l2tp_build_l2tpv3_header+0x360/0x360 [ 35.695841] 8b [ 35.699995] __sk_destruct+0x107/0xa60 [ 35.701878] a7 [ 35.706108] ? sock_warn_obsolete_bsdism+0xb0/0xb0 [ 35.707983] 78 [ 35.712376] ? lock_downgrade+0x8f0/0x8f0 [ 35.714234] 05 [ 35.718715] ? kasan_check_read+0x11/0x20 [ 35.720572] 00 [ 35.725575] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.727438] 00 [ 35.731323] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.733184] 48 [ 35.738112] ? lock_acquire+0x1e4/0x540 [ 35.739992] b8 [ 35.744128] ? rcu_process_callbacks+0xfc6/0x1850 [ 35.745988] 00 [ 35.750128] ? trace_hardirqs_on+0xd/0x10 [ 35.751999] 00 [ 35.756394] ? lock_release+0xa30/0xa30 [ 35.758253] 00 [ 35.762824] ? debug_stats_show+0x100/0x100 [ 35.764696] 00 [ 35.768666] ? rcu_pm_notify+0xc0/0xc0 [ 35.770523] 00 [ 35.775352] ? rcu_process_callbacks+0xe2f/0x1850 [ 35.777216] fc [ 35.781358] ? sock_warn_obsolete_bsdism+0xb0/0xb0 [ 35.783224] ff [ 35.787194] rcu_process_callbacks+0xed5/0x1850 [ 35.789053] df [ 35.793361] ? call_rcu_sched+0x20/0x20 [ 35.795246] 49 [ 35.799129] ? load_balance+0x3640/0x3640 [ 35.800992] 8d [ 35.805834] ? hrtimer_start_range_ns+0xd20/0xd20 [ 35.807698] bc [ 35.812619] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.814477] 24 [ 35.819142] ? ktime_get+0x2e1/0x440 [ 35.821005] d0 [ 35.824971] ? ktime_get_raw_ts64+0x4f0/0x4f0 [ 35.826835] 0a [ 35.830972] ? lock_downgrade+0x8f0/0x8f0 [ 35.832835] 00 [ 35.837698] ? run_rebalance_domains+0x365/0x4c0 [ 35.839561] 00 [ 35.844565] ? kasan_check_read+0x11/0x20 [ 35.846423] 48 [ 35.850133] ? rcu_is_watching+0x8c/0x150 [ 35.852008] 89 [ 35.856499] ? rcu_pm_notify+0xc0/0xc0 [ 35.858359] fa [ 35.862495] __do_softirq+0x2e8/0xb17 [ 35.864350] 48 [ 35.869102] ? __irqentry_text_end+0x1f97a8/0x1f97a8 [ 35.870964] c1 [ 35.875098] ? irq_exit+0xbb/0x210 [ 35.876959] ea [ 35.881092] ? smp_apic_timer_interrupt+0x186/0x730 [ 35.882951] 03 [ 35.886837] ? smp_call_function_single_interrupt+0x660/0x660 [ 35.888700] <80> [ 35.892485] ? _raw_spin_unlock+0x22/0x30 [ 35.894346] 3c [ 35.899451] ? handle_edge_irq+0x330/0x870 [ 35.901308] 02 [ 35.904835] ? task_prio+0x50/0x50 [ 35.906693] 00 [ 35.911718] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.913576] 0f [ 35.919458] do_softirq_own_stack+0x2a/0x40 [ 35.921501] 85 fa [ 35.925644] [ 35.927523] 00 [ 35.931747] do_softirq.part.17+0x155/0x1a0 [ 35.933618] 00 [ 35.937166] ? pppol2tp_sendmsg+0x49e/0x6c0 [ 35.939028] 00 [ 35.943868] __local_bh_enable_ip+0x1ec/0x230 [ 35.945731] 4d [ 35.950049] pppol2tp_sendmsg+0x4c4/0x6c0 [ 35.952172] 8b [ 35.954397] ? move_addr_to_kernel.part.20+0x100/0x100 [ 35.956268] a4 [ 35.960576] ? pppol2tp_getsockopt+0x950/0x950 [ 35.962437] 24 [ 35.966747] sock_sendmsg+0xd5/0x120 [ 35.968608] d0 [ 35.973089] ___sys_sendmsg+0x51d/0x930 [ 35.974953] 0a [ 35.979105] ? graph_lock+0x170/0x170 [ 35.980977] 00 [ 35.986281] ? copy_msghdr_from_user+0x580/0x580 [ 35.988141] 00 [ 35.992710] ? find_held_lock+0x36/0x1c0 [ 35.994571] 48 [ 35.998281] ? lock_downgrade+0x8f0/0x8f0 [ 36.000144] b8 [ 36.004107] ? __might_fault+0xa0/0x1e0 [ 36.005987] 00 [ 36.009781] ? rcu_note_context_switch+0x730/0x730 [ 36.011647] 00 [ 36.016405] ? check_same_owner+0x340/0x340 [ 36.022311] __sys_sendmmsg+0x240/0x6f0 [ 36.024191] RSP: 0018:ffff8801bc60f3c8 EFLAGS: 00010206 [ 36.028434] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 36.034262] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 36.036121] RAX: dffffc0000000000 RBX: 1ffff100378c1e79 RCX: ffffffff85d036fa [ 36.041034] ? fput+0x130/0x1a0 [ 36.042927] RDX: 000000000000015a RSI: ffffffff85d03833 RDI: 0000000000000ad0 [ 36.047258] ? __sys_connect+0x1d1/0x4c0 [ 36.051204] RBP: ffff8801bc60f450 R08: ffff8801be4fe400 R09: ffffed003b6246d6 [ 36.051215] R10: ffffed003b6246d6 R11: ffff8801db1236b3 R12: 0000000000000000 [ 36.056560] ? __ia32_sys_accept+0xb0/0xb0 [ 36.060857] R13: 0000000000000001 R14: ffff8801bc60f428 R15: ffff8801c6293680 [ 36.066381] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.073625] FS: 00007ff6b7fb5700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 36.076903] __x64_sys_sendmmsg+0x9d/0x100 [ 36.084167] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.088224] do_syscall_64+0x1b9/0x820 [ 36.095471] CR2: 00007ff6b7fb4e78 CR3: 00000001c63b3000 CR4: 00000000001406e0 [ 36.102742] ? finish_task_switch+0x1d3/0x870 [ 36.106950] Call Trace: [ 36.114226] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.118786] ? ipv6_select_ident+0x150/0x150 [ 36.127013] ? syscall_return_slowpath+0x31d/0x5e0 [ 36.131245] udpv6_sendmsg+0x2edb/0x35f0 [ 36.137144] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 36.141018] ? ip_reply_glue_bits+0xc0/0xc0 [ 36.148280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.152768] ? udpv6_queue_rcv_skb+0x1530/0x1530 [ 36.155332] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.160252] ? graph_lock+0x170/0x170 [ 36.164638] RIP: 0033:0x446a29 [ 36.164642] Code: e8 [ 36.169660] ? find_held_lock+0x36/0x1c0 [ 36.173712] ac [ 36.179081] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.183378] b8 [ 36.188227] ? rw_copy_check_uvector+0x30d/0x3e0 [ 36.192966] 02 [ 36.198151] ? find_held_lock+0x36/0x1c0 [ 36.201926] 00 [ 36.205112] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.207494] 48 [ 36.211552] ? import_iovec+0x269/0x470 [ 36.213410] 83 [ 36.218944] ? dup_iter+0x270/0x270 [ 36.220829] c4 [ 36.225598] inet_sendmsg+0x1a1/0x690 [ 36.227471] 18 [ 36.231531] ? udpv6_queue_rcv_skb+0x1530/0x1530 [ 36.233389] c3 [ 36.238916] ? inet_sendmsg+0x1a1/0x690 [ 36.238933] ? copy_msghdr_from_user+0x3c4/0x580 [ 36.240797] 0f [ 36.244757] ? ipip_gro_receive+0x100/0x100 [ 36.246657] 1f [ 36.250286] ? move_addr_to_kernel.part.20+0x100/0x100 [ 36.252148] 80 [ 36.255957] ? security_socket_sendmsg+0x94/0xc0 [ 36.257813] 00 [ 36.262564] ? ipip_gro_receive+0x100/0x100 [ 36.264435] 00 [ 36.268398] sock_sendmsg+0xd5/0x120 [ 36.273127] 00 [ 36.275012] ___sys_sendmsg+0x51d/0x930 [ 36.279314] 00 [ 36.281204] ? copy_msghdr_from_user+0x580/0x580 [ 36.286443] 48 89 [ 36.288333] ? __lock_acquire+0x7fc/0x5020 [ 36.293067] f8 [ 36.294961] ? __fget_light+0x2f7/0x440 [ 36.299348] 48 [ 36.301223] ? fget_raw+0x20/0x20 [ 36.304908] 89 [ 36.306794] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.310751] f7 [ 36.312657] ? sockfd_lookup_light+0xc5/0x160 [ 36.317387] 48 [ 36.319537] __sys_sendmmsg+0x240/0x6f0 [ 36.323746] 89 [ 36.325642] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 36.329589] d6 [ 36.331470] ? lock_downgrade+0x8f0/0x8f0 [ 36.334896] 48 [ 36.336778] ? finish_task_switch+0x18a/0x870 [ 36.342285] 89 [ 36.344193] ? kasan_check_read+0x11/0x20 [ 36.348665] ca [ 36.350545] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.354506] 4d [ 36.356395] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.360693] 89 [ 36.362577] __x64_sys_sendmmsg+0x9d/0x100 [ 36.366711] c2 [ 36.368601] do_syscall_64+0x1b9/0x820 [ 36.373068] 4d [ 36.374975] ? finish_task_switch+0x1d3/0x870 [ 36.379096] 89 [ 36.381198] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.385758] c8 [ 36.387655] ? syscall_return_slowpath+0x31d/0x5e0 [ 36.392217] 4c [ 36.394100] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 36.398306] 8b [ 36.400196] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.404066] 4c [ 36.405953] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.410429] 24 [ 36.412308] RIP: 0033:0x446a29 [ 36.417213] 08 [ 36.419085] Code: [ 36.424011] 0f [ 36.425887] e8 [ 36.431230] 05 [ 36.433102] ac [ 36.437925] <48> [ 36.439815] b8 [ 36.445001] 3d [ 36.446875] 02 [ 36.450047] 01 [ 36.451919] 00 [ 36.454069] f0 [ 36.455941] 48 [ 36.457826] ff [ 36.459715] 83 [ 36.461586] ff [ 36.463647] c4 [ 36.465529] 0f [ 36.467406] 18 [ 36.469276] 83 [ 36.471145] c3 [ 36.473019] eb [ 36.474893] 0f [ 36.476769] 08 [ 36.478649] 1f [ 36.480528] fc [ 36.482401] 80 [ 36.484270] ff [ 36.486142] 00 [ 36.488016] c3 [ 36.489888] 00 [ 36.491771] 66 [ 36.493676] 00 [ 36.495548] 2e [ 36.497420] 00 [ 36.499293] 0f [ 36.501165] 48 [ 36.503042] 1f [ 36.504918] 89 [ 36.506798] 84 [ 36.508671] f8 [ 36.510547] 00 [ 36.512422] 48 [ 36.514297] 00 [ 36.516200] 89 [ 36.518072] 00 [ 36.519945] f7 [ 36.521816] 00 [ 36.523703] 48 [ 36.527455] 89 [ 36.529329] RSP: 002b:00007ff6b7fd5db8 EFLAGS: 00000297 [ 36.531196] d6 [ 36.533067] ORIG_RAX: 0000000000000133 [ 36.534935] 48 [ 36.536812] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446a29 [ 36.538682] 89 [ 36.540557] RDX: 00000000000003e8 RSI: 0000000020005fc0 RDI: 0000000000000004 [ 36.542426] ca [ 36.544310] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 36.546182] 4d [ 36.551529] R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dcc2c [ 36.553399] 89 [ 36.557371] R13: 00007ffd01de1edf R14: 00007ff6b7fd69c0 R15: 0000000000000000 [ 36.559239] c2 [ 36.566492] [ 36.568359] 4d [ 36.575609] Allocated by task 4687: [ 36.577472] 89 [ 36.584735] save_stack+0x43/0xd0 [ 36.586622] c8 [ 36.593888] kasan_kmalloc+0xc4/0xe0 [ 36.595771] 4c [ 36.603027] kasan_slab_alloc+0x12/0x20 [ 36.604891] 8b [ 36.606528] kmem_cache_alloc+0x12e/0x760 [ 36.608400] 4c [ 36.612026] dst_alloc+0xbb/0x1d0 [ 36.613918] 24 [ 36.617380] ip6_dst_alloc+0x35/0xa0 [ 36.619242] 08 [ 36.622942] ip6_pol_route+0x83f/0x1250 [ 36.624818] 0f [ 36.628779] ip6_pol_route_output+0x54/0x70 [ 36.630638] 05 <48> [ 36.634799] fib6_rule_lookup+0x26e/0x700 [ 36.636668] 3d [ 36.640114] ip6_route_output_flags+0x2c5/0x350 [ 36.641993] 01 [ 36.645703] ip6_dst_lookup_tail+0xe3f/0x1da0 [ 36.647576] f0 [ 36.651550] ip6_dst_lookup_flow+0xc8/0x270 [ 36.653420] ff [ 36.657735] ip6_datagram_dst_update+0x75b/0xf80 [ 36.660039] ff [ 36.664198] __ip6_datagram_connect+0x5fe/0x1470 [ 36.666087] 0f [ 36.670747] ip6_datagram_connect+0x2f/0x50 [ 36.672629] 83 [ 36.677125] inet_dgram_connect+0x154/0x2e0 [ 36.678993] eb [ 36.683306] __sys_connect+0x37d/0x4c0 [ 36.685172] 08 [ 36.689920] __x64_sys_connect+0x73/0xb0 [ 36.691788] fc [ 36.696533] do_syscall_64+0x1b9/0x820 [ 36.698397] ff [ 36.702734] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.704600] c3 [ 36.708902] [ 36.710791] 66 [ 36.714667] Freed by task 4814: [ 36.716536] 2e [ 36.720590] save_stack+0x43/0xd0 [ 36.722453] 0f [ 36.726419] __kasan_slab_free+0x11a/0x170 [ 36.728281] 1f [ 36.733458] kasan_slab_free+0xe/0x10 [ 36.735326] 84 [ 36.736962] kmem_cache_free+0x86/0x2d0 [ 36.738843] 00 [ 36.742112] dst_destroy+0x267/0x3c0 [ 36.743975] 00 [ 36.747416] dst_destroy_rcu+0x16/0x20 [ 36.749280] 00 [ 36.753524] rcu_process_callbacks+0xed5/0x1850 [ 36.755387] 00 [ 36.759171] __do_softirq+0x2e8/0xb17 [ 36.759179] [ 36.765036] The buggy address belongs to the object at ffff8801c86e98c0 [ 36.765036] which belongs to the cache ip6_dst_cache of size 240 [ 36.766916] RSP: 002b:00007ff6b7fb4db8 EFLAGS: 00000246 [ 36.770619] The buggy address is located 64 bytes inside of [ 36.770619] 240-byte region [ffff8801c86e98c0, ffff8801c86e99b0) [ 36.772491] ORIG_RAX: 0000000000000133 [ 36.776358] The buggy address belongs to the page: [ 36.778237] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000446a29 [ 36.782888] page:ffffea000721ba40 count:1 mapcount:0 mapping:ffff8801cddcec40 index:0x0 [ 36.784761] RDX: 00000000000000b8 RSI: 0000000020001b00 RDI: 0000000000000003 [ 36.790171] RBP: 00000000006dcc30 R08: 00007ff6b7fb5700 R09: 0000000000000000 [ 36.802993] flags: 0x2fffc0000000100(slab) [ 36.808342] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c [ 36.820112] raw: 02fffc0000000100 ffffea0006d35888 ffffea00075de088 ffff8801cddcec40 [ 36.824066] R13: 00007ffd01de1edf R14: 00007ff6b7fb59c0 R15: 0000000000000001 [ 36.828978] raw: 0000000000000000 ffff8801c86e9000 000000010000000c 0000000000000000 [ 36.836256] Modules linked in: [ 36.844385] page dumped because: kasan: bad access detected [ 36.858926] [ 36.863145] Dumping ftrace buffer: [ 36.870403] Memory state around the buggy address: [ 36.878265] (ftrace buffer empty) [ 36.885534] ffff8801c86e9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.894336] ---[ end trace ce18b2247f7f6c70 ]--- [ 36.896587] ffff8801c86e9880: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 36.896595] >ffff8801c86e9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.896599] ^ [ 36.896610] ffff8801c86e9980: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 36.902338] RIP: 0010:ip6_dst_hoplimit+0x3b5/0x4d0 [ 36.903962] ffff8801c86e9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.903965] ================================================================== [ 36.903992] Kernel panic - not syncing: panic_on_warn set ... [ 36.903992] [ 36.907517] Code: [ 36.912736] Dumping ftrace buffer: [ 36.912741] (ftrace buffer empty) [ 36.912744] Kernel Offset: disabled [ 36.993782] Rebooting in 86400 seconds..