[ 83.807316][ T27] audit: type=1800 audit(1581959496.620:25): pid=9653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 84.835295][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 84.835309][ T27] audit: type=1800 audit(1581959497.640:29): pid=9653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 84.894403][ T27] audit: type=1800 audit(1581959497.640:30): pid=9653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.207891][ T9807] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 92.219925][ T9807] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 92.228494][ T9807] CPU: 0 PID: 9807 Comm: syz-executor290 Not tainted 5.6.0-rc2-next-20200217-syzkaller #0 [ 92.238470][ T9807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.248534][ T9807] RIP: 0010:sco_sock_getsockopt+0x33a/0x910 [ 92.254414][ T9807] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 74 05 00 00 49 8b 9e b8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 45 05 00 00 48 8b 3b e8 44 d1 f3 ff be c8 03 00 [ 92.274049][ T9807] RSP: 0018:ffffc90007a97d40 EFLAGS: 00010246 [ 92.280093][ T9807] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87282cb2 [ 92.288041][ T9807] RDX: 0000000000000000 RSI: ffffffff87282cc0 RDI: ffff88808cc7b4b8 [ 92.295996][ T9807] RBP: ffffc90007a97e00 R08: ffff8880a8fc0380 R09: fffffbfff1709225 [ 92.303954][ T9807] R10: fffffbfff1709224 R11: 0000000000000003 R12: 0000000000000000 [ 92.311993][ T9807] R13: 1ffff92000f52fab R14: ffff88808cc7b000 R15: 0000000000000000 [ 92.319942][ T9807] FS: 00000000009c3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.328846][ T9807] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.335406][ T9807] CR2: 0000000020000080 CR3: 00000000a6d61000 CR4: 00000000001406f0 [ 92.345353][ T9807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.353331][ T9807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.361320][ T9807] Call Trace: [ 92.364620][ T9807] ? sco_sock_destruct+0x30/0x30 [ 92.369633][ T9807] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 92.375169][ T9807] ? apparmor_socket_getsockopt+0x22/0x30 [ 92.380876][ T9807] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.387096][ T9807] ? security_socket_getsockopt+0x8d/0xc0 [ 92.392805][ T9807] __sys_getsockopt+0x16d/0x310 [ 92.397648][ T9807] ? up_read+0x1cd/0x810 [ 92.401878][ T9807] ? kernel_accept+0x360/0x360 [ 92.406618][ T9807] ? down_read_nested+0x440/0x440 [ 92.411633][ T9807] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.417079][ T9807] ? do_syscall_64+0x26/0x790 [ 92.421755][ T9807] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.427801][ T9807] ? do_syscall_64+0x26/0x790 [ 92.432559][ T9807] __x64_sys_getsockopt+0xbe/0x150 [ 92.437839][ T9807] do_syscall_64+0xfa/0x790 [ 92.442322][ T9807] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.448193][ T9807] RIP: 0033:0x440199 [ 92.452076][ T9807] 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 [ 92.472566][ T9807] RSP: 002b:00007ffd6ad93468 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 92.480955][ T9807] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440199 [ 92.488913][ T9807] RDX: 000000000000000e RSI: 0000000000000084 RDI: 0000000000000005 [ 92.496875][ T9807] RBP: 00000000006ca018 R08: 0000000020000080 R09: 00000000004002c8 [ 92.504911][ T9807] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a20 [ 92.512880][ T9807] R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 [ 92.520867][ T9807] Modules linked in: [ 92.525253][ T9807] ---[ end trace 2241e8fa1d14b6d0 ]--- [ 92.530789][ T9807] RIP: 0010:sco_sock_getsockopt+0x33a/0x910 [ 92.536904][ T9807] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 74 05 00 00 49 8b 9e b8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 45 05 00 00 48 8b 3b e8 44 d1 f3 ff be c8 03 00 [ 92.556537][ T9807] RSP: 0018:ffffc90007a97d40 EFLAGS: 00010246 [ 92.562606][ T9807] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87282cb2 [ 92.571000][ T9807] RDX: 0000000000000000 RSI: ffffffff87282cc0 RDI: ffff88808cc7b4b8 [ 92.579206][ T9807] RBP: ffffc90007a97e00 R08: ffff8880a8fc0380 R09: fffffbfff1709225 [ 92.587231][ T9807] R10: fffffbfff1709224 R11: 0000000000000003 R12: 0000000000000000 [ 92.595315][ T9807] R13: 1ffff92000f52fab R14: ffff88808cc7b000 R15: 0000000000000000 [ 92.603420][ T9807] FS: 00000000009c3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.612597][ T9807] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.619659][ T9807] CR2: 0000000020000080 CR3: 00000000a6d61000 CR4: 00000000001406f0 [ 92.627893][ T9807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.636222][ T9807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.644934][ T9807] Kernel panic - not syncing: Fatal exception [ 92.651888][ T9807] Kernel Offset: disabled [ 92.656225][ T9807] Rebooting in 86400 seconds..