[ 87.571080][ T27] audit: type=1800 audit(1581632926.415:26): pid=9670 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 88.483896][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 88.483911][ T27] audit: type=1800 audit(1581632927.345:29): pid=9670 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 [ 88.510675][ T27] audit: type=1800 audit(1581632927.355:30): pid=9670 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 '10.128.10.28' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.215660][ T9823] IPVS: ftp: loaded support on port[0] = 21 [ 97.261981][ T9823] BUG: unable to handle page fault for address: ffff887f9f31f7ff [ 97.269834][ T9823] #PF: supervisor read access in kernel mode [ 97.275796][ T9823] #PF: error_code(0x0000) - not-present page [ 97.281756][ T9823] PGD 0 P4D 0 [ 97.285227][ T9823] Oops: 0000 [#1] PREEMPT SMP KASAN [ 97.290532][ T9823] CPU: 1 PID: 9823 Comm: syz-executor908 Not tainted 5.5.0-syzkaller #0 [ 97.298922][ T9823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.308984][ T9823] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 97.315121][ T9823] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 97.334764][ T9823] RSP: 0018:ffffc9000688f770 EFLAGS: 00010246 [ 97.340834][ T9823] RAX: dffffc0000000000 RBX: ffff88809f30f800 RCX: ffffffff0000feff [ 97.349166][ T9823] RDX: 1ffff10ff3e63eff RSI: ffff8880a67ea970 RDI: 0000000000000005 [ 97.357126][ T9823] RBP: ffffc9000688f8b0 R08: ffff88808bcee280 R09: ffffed1013e61f5d [ 97.365085][ T9823] R10: ffffed1013e61f5c R11: ffff88809f30fae3 R12: ffff887f9f31f7ff [ 97.373043][ T9823] R13: 0000000000000100 R14: ffff88809f31f7ff R15: ffff8880a67ea900 [ 97.381011][ T9823] FS: 0000000000ad1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 97.389939][ T9823] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.396555][ T9823] CR2: ffff887f9f31f7ff CR3: 00000000a70ab000 CR4: 00000000001406e0 [ 97.404521][ T9823] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.412480][ T9823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.420479][ T9823] Call Trace: [ 97.423762][ T9823] ? generic_xdp_tx+0x740/0x740 [ 97.428605][ T9823] ? rcu_read_lock_held+0x9c/0xb0 [ 97.433720][ T9823] do_xdp_generic+0x30/0x50 [ 97.438208][ T9823] tun_get_user+0x2bcd/0x4020 [ 97.442874][ T9823] ? __kasan_check_read+0x11/0x20 [ 97.447945][ T9823] ? aa_file_perm+0x617/0x1600 [ 97.452707][ T9823] ? tun_build_skb.isra.0+0x1480/0x1480 [ 97.458255][ T9823] ? rcu_read_lock_held+0x9c/0xb0 [ 97.463348][ T9823] ? __kasan_check_read+0x11/0x20 [ 97.468429][ T9823] tun_chr_write_iter+0xbd/0x156 [ 97.473351][ T9823] do_iter_readv_writev+0x5f8/0x8f0 [ 97.478569][ T9823] ? no_seek_end_llseek_size+0x70/0x70 [ 97.484021][ T9823] ? apparmor_file_permission+0x27/0x30 [ 97.489564][ T9823] ? rw_verify_area+0x126/0x360 [ 97.494397][ T9823] do_iter_write+0x184/0x610 [ 97.499069][ T9823] ? dup_iter+0x260/0x260 [ 97.503386][ T9823] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.508494][ T9823] vfs_writev+0x1b3/0x2f0 [ 97.512808][ T9823] ? vfs_iter_write+0xb0/0xb0 [ 97.517477][ T9823] ? __do_sys_bpf+0x938/0x41e0 [ 97.523835][ T9823] ? __fget_light+0x1ad/0x270 [ 97.528545][ T9823] ? __fdget+0x1b/0x20 [ 97.532613][ T9823] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.538843][ T9823] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.545202][ T9823] ? __fget_light+0x1ad/0x270 [ 97.549896][ T9823] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.556127][ T9823] do_writev+0x15b/0x330 [ 97.560350][ T9823] ? vfs_writev+0x2f0/0x2f0 [ 97.565023][ T9823] ? do_syscall_64+0x26/0x790 [ 97.569678][ T9823] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.575776][ T9823] ? do_syscall_64+0x26/0x790 [ 97.580450][ T9823] __x64_sys_writev+0x75/0xb0 [ 97.585115][ T9823] do_syscall_64+0xfa/0x790 [ 97.589642][ T9823] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.595948][ T9823] RIP: 0033:0x4416b0 [ 97.599859][ T9823] Code: 05 48 3d 01 f0 ff ff 0f 83 fd 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 61 99 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0e fc ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 97.619504][ T9823] RSP: 002b:00007ffd0ed1ebf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 97.627990][ T9823] RAX: ffffffffffffffda RBX: 00007ffd0ed1ec10 RCX: 00000000004416b0 [ 97.635942][ T9823] RDX: 0000000000000001 RSI: 00007ffd0ed1ec40 RDI: 00000000000000f0 [ 97.643904][ T9823] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 97.651910][ T9823] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 [ 97.659865][ T9823] R13: 0000000000402aa0 R14: 0000000000000000 R15: 0000000000000000 [ 97.667876][ T9823] Modules linked in: [ 97.671802][ T9823] CR2: ffff887f9f31f7ff [ 97.675950][ T9823] ---[ end trace dfc427fb89af1c1a ]--- [ 97.681397][ T9823] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 97.687531][ T9823] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 97.707120][ T9823] RSP: 0018:ffffc9000688f770 EFLAGS: 00010246 [ 97.713165][ T9823] RAX: dffffc0000000000 RBX: ffff88809f30f800 RCX: ffffffff0000feff [ 97.721126][ T9823] RDX: 1ffff10ff3e63eff RSI: ffff8880a67ea970 RDI: 0000000000000005 [ 97.729098][ T9823] RBP: ffffc9000688f8b0 R08: ffff88808bcee280 R09: ffffed1013e61f5d [ 97.737054][ T9823] R10: ffffed1013e61f5c R11: ffff88809f30fae3 R12: ffff887f9f31f7ff [ 97.745014][ T9823] R13: 0000000000000100 R14: ffff88809f31f7ff R15: ffff8880a67ea900 [ 97.753055][ T9823] FS: 0000000000ad1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 97.761970][ T9823] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.768533][ T9823] CR2: ffff887f9f31f7ff CR3: 00000000a70ab000 CR4: 00000000001406e0 [ 97.776497][ T9823] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.784450][ T9823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.792405][ T9823] Kernel panic - not syncing: Fatal exception in interrupt [ 97.801156][ T9823] Kernel Offset: disabled [ 97.805484][ T9823] Rebooting in 86400 seconds..