[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.985463][ T27] audit: type=1800 audit(1580305648.840:25): pid=8842 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.006819][ T27] audit: type=1800 audit(1580305648.840:26): pid=8842 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.026578][ T27] audit: type=1800 audit(1580305648.840:27): pid=8842 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.227' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.253412][ T8997] general protection fault, probably for non-canonical address 0xe3fffa220287b002: 0000 [#1] PREEMPT SMP KASAN [ 66.270350][ T8997] KASAN: maybe wild-memory-access in range [0x1ffff110143d8010-0x1ffff110143d8017] [ 66.280293][ T8997] CPU: 1 PID: 8997 Comm: syz-executor794 Not tainted 5.5.0-syzkaller #0 [ 66.291516][ T8997] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.302148][ T8997] RIP: 0010:nf_flow_table_offload_setup+0x2cb/0x530 [ 66.309199][ T8997] Code: 90 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 5b de 0c fb 4c 8b 6d 90 48 89 9d 58 ff ff ff 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 d6 de 0c fb 48 8b 85 60 ff ff ff [ 66.331119][ T8997] RSP: 0018:ffffc90002047658 EFLAGS: 00010203 [ 66.338250][ T8997] RAX: 03fffe220287b002 RBX: 1ffff110143d8015 RCX: ffff88809536c040 [ 66.346665][ T8997] RDX: 0000000000000000 RSI: ffffffff895a0f00 RDI: ffffc90002047690 [ 66.355583][ T8997] RBP: ffffc90002047700 R08: 0000000000000005 R09: ffffffff86a72704 [ 66.364298][ T8997] R10: ffff88809536c040 R11: 0000000000000002 R12: dffffc0000000000 [ 66.372979][ T8997] R13: ffff88809c812048 R14: 1ffff1101390244a R15: ffff88809c812250 [ 66.381639][ T8997] FS: 0000000001a72880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 66.391180][ T8997] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.397973][ T8997] CR2: 0000000020000104 CR3: 00000000a85ca000 CR4: 00000000001406e0 [ 66.406095][ T8997] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.414483][ T8997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.423578][ T8997] Call Trace: [ 66.426882][ T8997] ? nf_tables_parse_netdev_hooks+0x6a7/0x6e0 [ 66.432962][ T8997] ? nf_flow_table_offload_flush+0x70/0x70 [ 66.438864][ T8997] nf_tables_newflowtable+0x1327/0x1ff0 [ 66.444547][ T8997] ? nf_tables_delobj+0xd40/0xd40 [ 66.449801][ T8997] nfnetlink_rcv+0xeba/0x1e40 [ 66.454847][ T8997] ? rcu_lock_release+0x21/0x30 [ 66.459911][ T8997] ? netlink_deliver_tap+0x142/0x860 [ 66.465320][ T8997] netlink_unicast+0x766/0x920 [ 66.470144][ T8997] netlink_sendmsg+0xa2b/0xd40 [ 66.474938][ T8997] ? netlink_getsockopt+0x9f0/0x9f0 [ 66.480145][ T8997] ____sys_sendmsg+0x4f7/0x7f0 [ 66.485453][ T8997] __sys_sendmsg+0x1ed/0x290 [ 66.490047][ T8997] ? handle_mm_fault+0x173a/0x2900 [ 66.495157][ T8997] ? __kasan_check_write+0x14/0x20 [ 66.500402][ T8997] ? __up_read+0x231/0x740 [ 66.505196][ T8997] ? check_preemption_disabled+0xb4/0x260 [ 66.511033][ T8997] ? debug_smp_processor_id+0x9/0x20 [ 66.516573][ T8997] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 66.522611][ T8997] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 66.528338][ T8997] ? do_syscall_64+0x1d/0x1c0 [ 66.533139][ T8997] __x64_sys_sendmsg+0x7f/0x90 [ 66.538157][ T8997] do_syscall_64+0xf7/0x1c0 [ 66.543044][ T8997] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.549691][ T8997] RIP: 0033:0x440689 [ 66.553580][ T8997] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 66.573316][ T8997] RSP: 002b:00007fff4dd6ae78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 66.581714][ T8997] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440689 [ 66.589990][ T8997] RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000003 [ 66.597954][ T8997] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 66.606131][ T8997] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f10 [ 66.617059][ T8997] R13: 0000000000401fa0 R14: 0000000000000000 R15: 0000000000000000 [ 66.625347][ T8997] Modules linked in: [ 66.630153][ T8997] ---[ end trace cc02219f428cf1c1 ]--- [ 66.635880][ T8997] RIP: 0010:nf_flow_table_offload_setup+0x2cb/0x530 [ 66.643304][ T8997] Code: 90 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 5b de 0c fb 4c 8b 6d 90 48 89 9d 58 ff ff ff 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 d6 de 0c fb 48 8b 85 60 ff ff ff [ 66.663729][ T8997] RSP: 0018:ffffc90002047658 EFLAGS: 00010203 [ 66.669966][ T8997] RAX: 03fffe220287b002 RBX: 1ffff110143d8015 RCX: ffff88809536c040 [ 66.678761][ T8997] RDX: 0000000000000000 RSI: ffffffff895a0f00 RDI: ffffc90002047690 [ 66.686743][ T8997] RBP: ffffc90002047700 R08: 0000000000000005 R09: ffffffff86a72704 [ 66.694956][ T8997] R10: ffff88809536c040 R11: 0000000000000002 R12: dffffc0000000000 [ 66.703169][ T8997] R13: ffff88809c812048 R14: 1ffff1101390244a R15: ffff88809c812250 [ 66.711494][ T8997] FS: 0000000001a72880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 66.720872][ T8997] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.727768][ T8997] CR2: 0000000020000104 CR3: 00000000a85ca000 CR4: 00000000001406e0 [ 66.735852][ T8997] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.744025][ T8997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.752081][ T8997] Kernel panic - not syncing: Fatal exception [ 66.759741][ T8997] Kernel Offset: disabled [ 66.764411][ T8997] Rebooting in 86400 seconds..