[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.925730][ T27] audit: type=1800 audit(1580306776.898:25): pid=8725 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.949798][ T27] audit: type=1800 audit(1580306776.898:26): pid=8725 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.993020][ T27] audit: type=1800 audit(1580306776.908:27): pid=8725 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 '10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.185918][ T8877] general protection fault, probably for non-canonical address 0xe3fffa220268d202: 0000 [#1] PREEMPT SMP KASAN [ 67.198085][ T8877] KASAN: maybe wild-memory-access in range [0x1ffff11013469010-0x1ffff11013469017] [ 67.209598][ T8877] CPU: 1 PID: 8877 Comm: syz-executor472 Not tainted 5.5.0-syzkaller #0 [ 67.220727][ T8877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.231064][ T8877] RIP: 0010:nf_flow_table_offload_setup+0x2cb/0x530 [ 67.237952][ T8877] 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 [ 67.258600][ T8877] RSP: 0018:ffffc900020ef658 EFLAGS: 00010203 [ 67.264951][ T8877] RAX: 03fffe220268d202 RBX: 1ffff11013469015 RCX: ffff8880a66282c0 [ 67.273015][ T8877] RDX: 0000000000000000 RSI: ffffffff895a0f00 RDI: ffffc900020ef690 [ 67.281164][ T8877] RBP: ffffc900020ef700 R08: 0000000000000005 R09: ffffffff86a72704 [ 67.289503][ T8877] R10: ffff8880a66282c0 R11: 0000000000000002 R12: dffffc0000000000 [ 67.297888][ T8877] R13: ffff888090367048 R14: 1ffff1101206ce4a R15: ffff888090367250 [ 67.306035][ T8877] FS: 0000000001541880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 67.314992][ T8877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.322178][ T8877] CR2: 0000000020000104 CR3: 000000009f4ff000 CR4: 00000000001406e0 [ 67.330389][ T8877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.338432][ T8877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.347805][ T8877] Call Trace: [ 67.351193][ T8877] ? nf_tables_parse_netdev_hooks+0x6a7/0x6e0 [ 67.357270][ T8877] ? nf_flow_table_offload_flush+0x70/0x70 [ 67.363077][ T8877] nf_tables_newflowtable+0x1327/0x1ff0 [ 67.368643][ T8877] ? nf_tables_delobj+0xd40/0xd40 [ 67.373755][ T8877] nfnetlink_rcv+0xeba/0x1e40 [ 67.379010][ T8877] ? rcu_lock_release+0x21/0x30 [ 67.384050][ T8877] ? netlink_deliver_tap+0x142/0x860 [ 67.389434][ T8877] netlink_unicast+0x766/0x920 [ 67.394799][ T8877] netlink_sendmsg+0xa2b/0xd40 [ 67.399684][ T8877] ? netlink_getsockopt+0x9f0/0x9f0 [ 67.405117][ T8877] ____sys_sendmsg+0x4f7/0x7f0 [ 67.411266][ T8877] __sys_sendmsg+0x1ed/0x290 [ 67.416209][ T8877] ? handle_mm_fault+0x173a/0x2900 [ 67.421594][ T8877] ? __kasan_check_write+0x14/0x20 [ 67.426695][ T8877] ? __up_read+0x231/0x740 [ 67.431282][ T8877] ? check_preemption_disabled+0xb4/0x260 [ 67.437426][ T8877] ? debug_smp_processor_id+0x9/0x20 [ 67.444044][ T8877] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.449508][ T8877] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 67.455684][ T8877] ? do_syscall_64+0x1d/0x1c0 [ 67.460374][ T8877] __x64_sys_sendmsg+0x7f/0x90 [ 67.465126][ T8877] do_syscall_64+0xf7/0x1c0 [ 67.469636][ T8877] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.475622][ T8877] RIP: 0033:0x440689 [ 67.479504][ T8877] 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 [ 67.499103][ T8877] RSP: 002b:00007ffdc94dfa28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.507505][ T8877] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440689 [ 67.515475][ T8877] RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000003 [ 67.523437][ T8877] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.531497][ T8877] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f10 [ 67.540251][ T8877] R13: 0000000000401fa0 R14: 0000000000000000 R15: 0000000000000000 [ 67.548487][ T8877] Modules linked in: [ 67.552901][ T8877] ---[ end trace 20591ef9660a9f9a ]--- [ 67.559018][ T8877] RIP: 0010:nf_flow_table_offload_setup+0x2cb/0x530 [ 67.565900][ T8877] 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 [ 67.585765][ T8877] RSP: 0018:ffffc900020ef658 EFLAGS: 00010203 [ 67.591857][ T8877] RAX: 03fffe220268d202 RBX: 1ffff11013469015 RCX: ffff8880a66282c0 [ 67.599852][ T8877] RDX: 0000000000000000 RSI: ffffffff895a0f00 RDI: ffffc900020ef690 [ 67.607829][ T8877] RBP: ffffc900020ef700 R08: 0000000000000005 R09: ffffffff86a72704 [ 67.616185][ T8877] R10: ffff8880a66282c0 R11: 0000000000000002 R12: dffffc0000000000 [ 67.624909][ T8877] R13: ffff888090367048 R14: 1ffff1101206ce4a R15: ffff888090367250 [ 67.633019][ T8877] FS: 0000000001541880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 67.642282][ T8877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.649153][ T8877] CR2: 0000000020000104 CR3: 000000009f4ff000 CR4: 00000000001406e0 [ 67.657335][ T8877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.665521][ T8877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.673978][ T8877] Kernel panic - not syncing: Fatal exception [ 67.681598][ T8877] Kernel Offset: disabled [ 67.686202][ T8877] Rebooting in 86400 seconds..