[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. 2021/04/21 12:22:45 fuzzer started 2021/04/21 12:22:46 dialing manager at 10.128.0.169:39737 2021/04/21 12:22:46 syscalls: 1690 2021/04/21 12:22:46 code coverage: enabled 2021/04/21 12:22:46 comparison tracing: enabled 2021/04/21 12:22:46 extra coverage: enabled 2021/04/21 12:22:46 setuid sandbox: enabled 2021/04/21 12:22:46 namespace sandbox: enabled 2021/04/21 12:22:46 Android sandbox: /sys/fs/selinux/policy does not exist 2021/04/21 12:22:46 fault injection: enabled 2021/04/21 12:22:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/04/21 12:22:46 net packet injection: enabled 2021/04/21 12:22:46 net device setup: enabled 2021/04/21 12:22:46 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/04/21 12:22:46 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/04/21 12:22:46 USB emulation: enabled 2021/04/21 12:22:46 hci packet injection: enabled 2021/04/21 12:22:46 wifi device emulation: enabled 2021/04/21 12:22:46 802.15.4 emulation: enabled 2021/04/21 12:22:46 fetching corpus: 0, signal 0/2000 (executing program) syzkaller login: [ 70.372693][ C0] ================================================================== [ 70.373167][ T1] BUG: unable to handle page fault for address: ffffea0003ffff88 [ 70.381044][ C0] BUG: KASAN: use-after-free in skb_try_coalesce+0x1334/0x1440 [ 70.388754][ T1] #PF: supervisor read access in kernel mode [ 70.396311][ C0] Write of size 4 at addr ffff8880256a8008 by task systemd-udevd/8384 [ 70.402271][ T1] #PF: error_code(0x0000) - not-present page [ 70.410401][ C0] [ 70.410412][ C0] CPU: 0 PID: 8384 Comm: systemd-udevd Not tainted 5.12.0-rc7-syzkaller #0 [ 70.416365][ T1] PGD 13fff8067 P4D 13fff8067 [ 70.418679][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.427511][ T1] PUD 13fff7067 [ 70.432299][ C0] Call Trace: [ 70.432313][ C0] [ 70.442379][ T1] PMD 0 [ 70.445933][ C0] dump_stack+0x141/0x1d7 [ 70.449209][ T1] [ 70.449217][ T1] Oops: 0000 [#1] PREEMPT SMP KASAN [ 70.452069][ C0] ? skb_try_coalesce+0x1334/0x1440 [ 70.454895][ T1] CPU: 1 PID: 1 Comm: systemd Not tainted 5.12.0-rc7-syzkaller #0 [ 70.459290][ C0] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 70.461628][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.466807][ C0] ? skb_try_coalesce+0x1334/0x1440 [ 70.471983][ T1] RIP: 0010:qlist_free_all+0x85/0xc0 [ 70.479768][ C0] ? skb_try_coalesce+0x1334/0x1440 [ 70.486779][ T1] Code: 85 ff 74 3b 4c 89 fe 48 85 ed 48 89 ef 75 cb 48 89 f7 48 89 34 24 e8 2a 52 7b ff 48 8b 34 24 48 c1 e8 0c 48 c1 e0 06 4c 01 f0 <48> 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 78 18 eb 9b 49 [ 70.496835][ C0] kasan_report.cold+0x7c/0xd8 [ 70.502013][ T1] RSP: 0018:ffffc90000c67c98 EFLAGS: 00010282 [ 70.507284][ C0] ? __sanitizer_cov_trace_cmp8+0x61/0x70 [ 70.512457][ T1] [ 70.512464][ T1] RAX: ffffea0003ffff80 RBX: ffff888028576600 RCX: 0000000000000000 [ 70.532067][ C0] ? skb_try_coalesce+0x1334/0x1440 [ 70.536820][ T1] RDX: ffff888140740000 RSI: ffff8880ffffea00 RDI: 0000000000000003 [ 70.542889][ C0] skb_try_coalesce+0x1334/0x1440 [ 70.548589][ T1] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002e [ 70.550915][ C0] tcp_try_coalesce+0x393/0x920 [ 70.558887][ T1] R10: ffffffff813371ca R11: 000000000000003f R12: dffffc0000000000 [ 70.564071][ C0] ? mark_held_locks+0x9f/0xe0 [ 70.572025][ T1] R13: ffffc90000c67cd0 R14: ffffea0000000000 R15: ffff8880ffffea00 [ 70.577044][ C0] ? tcp_urg.part.0+0x2d0/0x2d0 [ 70.585029][ T1] FS: 00007fdfa082c500(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 70.589870][ C0] ? ktime_get+0x38a/0x470 [ 70.597825][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.602569][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 70.610524][ T1] CR2: ffffea0003ffff88 CR3: 0000000022095000 CR4: 00000000001506e0 [ 70.615388][ C0] tcp_queue_rcv+0x8a/0x6e0 [ 70.624310][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.628730][ C0] tcp_rcv_established+0x175e/0x1eb0 [ 70.635296][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.640594][ C0] ? tcp_data_queue+0x4b10/0x4b10 [ 70.648545][ T1] Call Trace: [ 70.648558][ T1] kasan_quarantine_reduce+0x180/0x200 [ 70.653029][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 70.661010][ T1] __kasan_slab_alloc+0x7f/0x90 [ 70.666315][ C0] tcp_v4_do_rcv+0x5d1/0x870 [ 70.674269][ T1] kmem_cache_alloc+0x155/0x370 [ 70.679282][ C0] tcp_v4_rcv+0x3298/0x3950 [ 70.682551][ T1] getname_flags.part.0+0x50/0x4f0 [ 70.687990][ C0] ? tcp_v4_early_demux+0x8f0/0x8f0 [ 70.693005][ T1] getname+0x8e/0xd0 [ 70.697856][ C0] ? lock_release+0x720/0x720 [ 70.702428][ T1] do_sys_openat2+0xf5/0x420 [ 70.707274][ C0] ip_protocol_deliver_rcu+0x5c/0xa20 [ 70.711754][ T1] ? build_open_flags+0x6f0/0x6f0 [ 70.716855][ C0] ip_local_deliver_finish+0x20a/0x370 [ 70.722031][ T1] ? __context_tracking_exit+0xb8/0xe0 [ 70.726865][ C0] ip_local_deliver+0x1b3/0x200 [ 70.731530][ T1] ? lock_downgrade+0x6e0/0x6e0 [ 70.736117][ C0] ip_sublist_rcv_finish+0x9a/0x2c0 [ 70.741485][ T1] __x64_sys_open+0x119/0x1c0 [ 70.746494][ C0] ip_list_rcv_finish.constprop.0+0x51e/0x6e0 [ 70.751935][ T1] ? do_sys_open+0x140/0x140 [ 70.757382][ C0] ? ip_rcv_finish_core.constprop.0+0x1e70/0x1e70 [ 70.762223][ T1] ? syscall_enter_from_user_mode+0x27/0x70 [ 70.767073][ C0] ? ip_list_rcv_finish.constprop.0+0x6e0/0x6e0 [ 70.772371][ T1] do_syscall_64+0x2d/0x70 [ 70.777038][ C0] ? ip_rcv_core+0x867/0xcb0 [ 70.783098][ T1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 70.787754][ C0] ip_list_rcv+0x34e/0x490 [ 70.794149][ T1] RIP: 0033:0x7fdf9edcd9b1 [ 70.800044][ C0] ? ip_rcv+0xd0/0xd0 [ 70.806263][ T1] Code: f7 d8 bf ff ff ff ff 64 89 02 eb cb 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 80 3f 00 74 1b be 00 08 09 00 b8 02 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1f 89 c7 e9 00 ff ff ff 48 8b 05 b1 54 2e 00 [ 70.810666][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 70.815238][ T1] RSP: 002b:00007fffe9750148 EFLAGS: 00000202 [ 70.821132][ C0] ? find_held_lock+0x2d/0x110 [ 70.825621][ T1] ORIG_RAX: 0000000000000002 [ 70.830022][ C0] ? ip_rcv+0xd0/0xd0 [ 70.833984][ T1] RAX: ffffffffffffffda RBX: 00005576dafccb40 RCX: 00007fdf9edcd9b1 [ 70.853684][ C0] __netif_receive_skb_list_core+0x549/0x8e0 [ 70.859671][ T1] RDX: 00005576daadda90 RSI: 0000000000090800 RDI: 00005576daff4340 [ 70.865840][ C0] ? process_backlog+0x6c0/0x6c0 [ 70.870584][ T1] RBP: 00005576daff4340 R08: 0000000000000000 R09: 0000000000000050 [ 70.875250][ C0] ? ktime_get_with_offset+0x3f2/0x500 [ 70.879210][ T1] R10: 0000000000000004 R11: 0000000000000202 R12: 00005576daf468e0 [ 70.887186][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 70.893148][ T1] R13: 00005576daff4340 R14: 0000000000000000 R15: 00005576daadda90 [ 70.901124][ C0] netif_receive_skb_list_internal+0x777/0xd70 [ 70.906059][ T1] Modules linked in: [ 70.914050][ C0] ? __netif_receive_skb_list_core+0x8e0/0x8e0 [ 70.919524][ T1] [ 70.919540][ T1] CR2: ffffea0003ffff88 [ 70.927493][ C0] ? xdp_linearize_page+0x840/0x840 [ 70.932685][ T1] ---[ end trace d228d501ced3cb6b ]--- [ 70.940635][ C0] ? detach_buf_split+0x599/0x7b0 [ 70.946769][ T1] RIP: 0010:qlist_free_all+0x85/0xc0 [ 70.950652][ C0] napi_complete_done+0x1f1/0x880 [ 70.956791][ T1] Code: 85 ff 74 3b 4c 89 fe 48 85 ed 48 89 ef 75 cb 48 89 f7 48 89 34 24 e8 2a 52 7b ff 48 8b 34 24 48 c1 e8 0c 48 c1 e0 06 4c 01 f0 <48> 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 78 18 eb 9b 49 [ 70.959120][ C0] virtqueue_napi_complete+0x2c/0xc0 [ 70.963253][ T1] RSP: 0018:ffffc90000c67c98 EFLAGS: 00010282 [ 70.968437][ C0] virtnet_poll+0xbbb/0x10b0 [ 70.973873][ T1] [ 70.973882][ T1] RAX: ffffea0003ffff80 RBX: ffff888028576600 RCX: 0000000000000000 [ 70.978883][ C0] ? receive_buf+0x6220/0x6220 [ 70.984142][ T1] RDX: ffff888140740000 RSI: ffff8880ffffea00 RDI: 0000000000000003 [ 70.989162][ C0] __napi_poll+0xaf/0x440 [ 71.009616][ T1] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002e [ 71.014917][ C0] net_rx_action+0x801/0xb40 [ 71.020970][ T1] R10: ffffffff813371ca R11: 000000000000003f R12: dffffc0000000000 [ 71.025556][ C0] ? napi_threaded_poll+0x5b0/0x5b0 [ 71.027863][ T1] R13: ffffc90000c67cd0 R14: ffffea0000000000 R15: ffff8880ffffea00 [ 71.035837][ C0] __do_softirq+0x29b/0x9f6 [ 71.040611][ T1] FS: 00007fdfa082c500(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 71.048575][ C0] irq_exit_rcu+0x134/0x200 [ 71.052899][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.060858][ C0] common_interrupt+0xa4/0xd0 [ 71.065427][ T1] CR2: ffffea0003ffff88 CR3: 0000000022095000 CR4: 00000000001506e0 [ 71.073397][ C0] [ 71.078573][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.086539][ C0] asm_common_interrupt+0x1e/0x40 [ 71.091029][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.099950][ C0] RIP: 0010:lock_release+0x124/0x720 [ 71.104450][ T1] Kernel panic - not syncing: Fatal exception [ 71.111020][ C0] Code: 85 e8 02 00 00 65 4c 8b 34 25 00 f0 01 00 49 8d be ec 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 64 05 00 00 45 [ 71.178680][ C0] RSP: 0018:ffffc900013ef1e8 EFLAGS: 00000a07 [ 71.184795][ C0] RAX: dffffc0000000000 RBX: ffffffff8dc6468c RCX: 0000000000000001 [ 71.192985][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888012fba62c [ 71.200999][ C0] RBP: 1ffff9200027de3f R08: 0000000000000000 R09: ffffffff8dc6158f [ 71.209004][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8bf74520 [ 71.217014][ C0] R13: 0000000000000000 R14: ffff888012fb9c40 R15: 0000000000000d40 [ 71.225033][ C0] ? lock_release+0x5d3/0x720 [ 71.229738][ C0] ? is_bpf_text_address+0xa9/0x160 [ 71.234967][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 71.240009][ C0] ? unwind_next_frame+0xec8/0x1ce0 [ 71.245240][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.251324][ C0] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 71.257072][ C0] is_bpf_text_address+0xcb/0x160 [ 71.262979][ C0] kernel_text_address+0xbd/0xf0 [ 71.267934][ C0] __kernel_text_address+0x9/0x30 [ 71.272996][ C0] unwind_get_return_address+0x51/0x90 [ 71.278470][ C0] ? create_prof_cpu_mask+0x20/0x20 [ 71.283700][ C0] arch_stack_walk+0x93/0xe0 [ 71.288321][ C0] stack_trace_save+0x8c/0xc0 [ 71.293004][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 71.298832][ C0] ? __lock_acquire+0x16b3/0x54c0 [ 71.303870][ C0] kasan_save_stack+0x1b/0x40 [ 71.308562][ C0] ? kasan_save_stack+0x1b/0x40 [ 71.313417][ C0] ? __kasan_slab_alloc+0x75/0x90 [ 71.318445][ C0] ? kmem_cache_alloc+0x155/0x370 [ 71.323566][ C0] ? security_inode_alloc+0x34/0x160 [ 71.328956][ C0] ? inode_init_always+0x5d8/0xd60 [ 71.334086][ C0] ? alloc_inode+0x82/0x230 [ 71.338589][ C0] ? iget_locked+0x1d0/0x740 [ 71.343206][ C0] ? kernfs_get_inode+0x47/0x520 [ 71.348169][ C0] ? kernfs_iop_lookup+0x194/0x220 [ 71.353304][ C0] ? __lookup_slow+0x24c/0x480 [ 71.358069][ C0] ? walk_component+0x418/0x6a0 [ 71.362921][ C0] ? link_path_walk.part.0+0x712/0xc90 [ 71.368384][ C0] ? path_openat+0x25a/0x27e0 [ 71.373066][ C0] ? do_filp_open+0x190/0x3d0 [ 71.377744][ C0] ? do_sys_openat2+0x16d/0x420 [ 71.382599][ C0] ? __x64_sys_open+0x119/0x1c0 [ 71.387456][ C0] ? do_syscall_64+0x2d/0x70 [ 71.392050][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.398122][ C0] ? iget_locked+0x1d0/0x740 [ 71.402726][ C0] ? kernfs_get_inode+0x47/0x520 [ 71.407685][ C0] ? ___slab_alloc+0x147/0x7a0 [ 71.412448][ C0] ? find_held_lock+0x2d/0x110 [ 71.417220][ C0] ? security_inode_alloc+0x34/0x160 [ 71.422509][ C0] ? mark_held_locks+0x9f/0xe0 [ 71.427298][ C0] ? __slab_alloc.constprop.0+0xaf/0xf0 [ 71.432862][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 71.438172][ C0] ? kasan_unpoison+0x3a/0x60 [ 71.443335][ C0] __kasan_slab_alloc+0x75/0x90 [ 71.448202][ C0] kmem_cache_alloc+0x155/0x370 [ 71.453151][ C0] security_inode_alloc+0x34/0x160 [ 71.458276][ C0] inode_init_always+0x5d8/0xd60 [ 71.463227][ C0] alloc_inode+0x82/0x230 [ 71.467582][ C0] iget_locked+0x1d0/0x740 [ 71.472003][ C0] kernfs_get_inode+0x47/0x520 [ 71.476795][ C0] kernfs_iop_lookup+0x194/0x220 [ 71.481768][ C0] __lookup_slow+0x24c/0x480 [ 71.486366][ C0] ? page_put_link+0x210/0x210 [ 71.491136][ C0] ? plantronics_probe.cold+0x1c/0x3a [ 71.496517][ C0] ? plantronics_probe.cold+0x1c/0x3a [ 71.501899][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 71.507545][ C0] walk_component+0x418/0x6a0 [ 71.512243][ C0] ? handle_dots.part.0+0x15d0/0x15d0 [ 71.517629][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.524516][ C0] ? security_inode_permission+0xc5/0xf0 [ 71.530184][ C0] link_path_walk.part.0+0x712/0xc90 [ 71.535497][ C0] ? walk_component+0x6a0/0x6a0 [ 71.540357][ C0] ? percpu_counter_add_batch+0xbd/0x180 [ 71.546002][ C0] path_openat+0x25a/0x27e0 [ 71.550513][ C0] ? path_lookupat+0x850/0x850 [ 71.555296][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 71.561284][ C0] do_filp_open+0x190/0x3d0 [ 71.565789][ C0] ? may_open_dev+0xf0/0xf0 [ 71.570295][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 71.575344][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 71.580288][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 71.586547][ C0] ? _raw_spin_unlock+0x24/0x40 [ 71.591409][ C0] ? alloc_fd+0x2bc/0x640 [ 71.595853][ C0] do_sys_openat2+0x16d/0x420 [ 71.600555][ C0] ? build_open_flags+0x6f0/0x6f0 [ 71.605596][ C0] ? __context_tracking_exit+0xb8/0xe0 [ 71.611067][ C0] __x64_sys_open+0x119/0x1c0 [ 71.615755][ C0] ? do_sys_open+0x140/0x140 [ 71.620440][ C0] ? __secure_computing+0x104/0x360 [ 71.625750][ C0] do_syscall_64+0x2d/0x70 [ 71.630377][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.636291][ C0] RIP: 0033:0x7f830c9dd6f0 [ 71.640709][ C0] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24 [ 71.660323][ C0] RSP: 002b:00007ffcebd63138 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 71.668746][ C0] RAX: ffffffffffffffda RBX: 0000562996cfc210 RCX: 00007f830c9dd6f0 [ 71.676754][ C0] RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffcebd632e0 [ 71.684724][ C0] RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001 [ 71.692699][ C0] R10: 0000000000080000 R11: 0000000000000246 R12: 0000562995c6f68a [ 71.700674][ C0] R13: 0000000000000001 R14: 0000562996cf7900 R15: 00007ffcebd63370 [ 71.708659][ C0] [ 71.710989][ C0] Allocated by task 6422: [ 71.715309][ C0] kasan_save_stack+0x1b/0x40 [ 71.719999][ C0] __kasan_kmalloc+0x99/0xc0 [ 71.724617][ C0] tomoyo_realpath_from_path+0xc3/0x620 [ 71.730207][ C0] tomoyo_check_open_permission+0x272/0x380 [ 71.736140][ C0] tomoyo_file_open+0xa3/0xd0 [ 71.740819][ C0] security_file_open+0x52/0x4f0 [ 71.745755][ C0] do_dentry_open+0x358/0x11b0 [ 71.750520][ C0] path_openat+0x1c0e/0x27e0 [ 71.755113][ C0] do_filp_open+0x190/0x3d0 [ 71.759619][ C0] do_sys_openat2+0x16d/0x420 [ 71.764299][ C0] __x64_sys_open+0x119/0x1c0 [ 71.768994][ C0] do_syscall_64+0x2d/0x70 [ 71.773423][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.779360][ C0] [ 71.781682][ C0] The buggy address belongs to the object at ffff8880256a8000 [ 71.781682][ C0] which belongs to the cache kmalloc-4k of size 4096 [ 71.795733][ C0] The buggy address is located 8 bytes inside of [ 71.795733][ C0] 4096-byte region [ffff8880256a8000, ffff8880256a9000) [ 71.808925][ C0] The buggy address belongs to the page: [ 71.814658][ C0] page:ffffea000095aa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880256a8000 pfn:0x256a8 [ 71.826119][ C0] head:ffffea000095aa00 order:3 compound_mapcount:0 compound_pincount:0 [ 71.834448][ C0] flags: 0xfff00000010200(slab|head) [ 71.839745][ C0] raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888010842140 [ 71.848343][ C0] raw: ffff8880256a8000 0000000080040000 00000001ffffffff 0000000000000000 [ 71.856936][ C0] page dumped because: kasan: bad access detected [ 71.863348][ C0] [ 71.865667][ C0] Memory state around the buggy address: [ 71.871292][ C0] ffff8880256a7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.879391][ C0] ffff8880256a7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.887457][ C0] >ffff8880256a8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.895533][ C0] ^ [ 71.899872][ C0] ffff8880256a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.907962][ C0] ffff8880256a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.916029][ C0] ================================================================== [ 71.924666][ T1] Kernel Offset: disabled [ 71.929021][ T1] Rebooting in 86400 seconds..