[ 83.948034][ T26] audit: type=1800 audit(1580493541.033:26): pid=9610 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. [ 84.925484][ T26] kauditd_printk_skb: 2 callbacks suppressed [ 84.925495][ T26] audit: type=1800 audit(1580493542.033:29): pid=9610 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 [ 84.952552][ T26] audit: type=1800 audit(1580493542.033:30): pid=9610 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 '10.128.0.17' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 94.551924][ T9765] IPVS: ftp: loaded support on port[0] = 21 [ 94.605497][ T9767] BUG: unable to handle page fault for address: ffff887f9fa13fff [ 94.613292][ T9767] #PF: supervisor read access in kernel mode [ 94.619264][ T9767] #PF: error_code(0x0000) - not-present page [ 94.625218][ T9767] PGD 0 P4D 0 [ 94.628577][ T9767] Oops: 0000 [#1] PREEMPT SMP KASAN [ 94.633771][ T9767] CPU: 1 PID: 9767 Comm: syz-executor819 Not tainted 5.5.0-syzkaller #0 [ 94.642072][ T9767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.652122][ T9767] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 94.658297][ T9767] 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 [ 94.677890][ T9767] RSP: 0018:ffffc90000f77770 EFLAGS: 00010246 [ 94.683941][ T9767] RAX: dffffc0000000000 RBX: ffff88809fa04000 RCX: ffffffff0000feff [ 94.692007][ T9767] RDX: 1ffff10ff3f427ff RSI: ffff8880950496b0 RDI: 0000000000000005 [ 94.699967][ T9767] RBP: ffffc90000f778b0 R08: ffff88809fc4e140 R09: ffffed1013f4085d [ 94.707935][ T9767] R10: ffffed1013f4085c R11: ffff88809fa042e3 R12: ffff887f9fa13fff [ 94.716109][ T9767] R13: 0000000000000100 R14: ffff88809fa13fff R15: ffff888095049640 [ 94.725207][ T9767] FS: 00000000014a6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 94.736270][ T9767] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.742882][ T9767] CR2: ffff887f9fa13fff CR3: 00000000a928d000 CR4: 00000000001406e0 [ 94.750842][ T9767] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.758797][ T9767] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.766799][ T9767] Call Trace: [ 94.770087][ T9767] ? generic_xdp_tx+0x740/0x740 [ 94.774926][ T9767] ? rcu_read_lock_held+0x9c/0xb0 [ 94.779945][ T9767] do_xdp_generic+0x30/0x50 [ 94.784434][ T9767] tun_get_user+0x2bcd/0x4020 [ 94.789102][ T9767] ? __kasan_check_read+0x11/0x20 [ 94.794147][ T9767] ? aa_file_perm+0x617/0x1600 [ 94.798908][ T9767] ? tun_build_skb.isra.0+0x1480/0x1480 [ 94.804448][ T9767] ? rcu_read_lock_held+0x9c/0xb0 [ 94.809454][ T9767] ? __kasan_check_read+0x11/0x20 [ 94.814592][ T9767] tun_chr_write_iter+0xbd/0x156 [ 94.819513][ T9767] do_iter_readv_writev+0x5f8/0x8f0 [ 94.824691][ T9767] ? no_seek_end_llseek_size+0x70/0x70 [ 94.830137][ T9767] ? apparmor_file_permission+0x27/0x30 [ 94.835665][ T9767] ? rw_verify_area+0x126/0x360 [ 94.840511][ T9767] do_iter_write+0x184/0x610 [ 94.845091][ T9767] ? dup_iter+0x260/0x260 [ 94.849445][ T9767] ? mark_lock+0xc2/0x1220 [ 94.853844][ T9767] vfs_writev+0x1b3/0x2f0 [ 94.858158][ T9767] ? vfs_iter_write+0xb0/0xb0 [ 94.862822][ T9767] ? lock_downgrade+0x920/0x920 [ 94.867651][ T9767] ? handle_mm_fault+0x292/0xa50 [ 94.872583][ T9767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.878806][ T9767] ? __fget_light+0x1ad/0x270 [ 94.883482][ T9767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.889702][ T9767] do_writev+0x15b/0x330 [ 94.893926][ T9767] ? vfs_writev+0x2f0/0x2f0 [ 94.898424][ T9767] ? do_syscall_64+0x26/0x790 [ 94.903080][ T9767] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.909136][ T9767] ? do_syscall_64+0x26/0x790 [ 94.913810][ T9767] __x64_sys_writev+0x75/0xb0 [ 94.918576][ T9767] do_syscall_64+0xfa/0x790 [ 94.923078][ T9767] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.928947][ T9767] RIP: 0033:0x441f30 [ 94.932859][ T9767] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d e1 90 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 94.952445][ T9767] RSP: 002b:00007fff6ad34eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 94.960840][ T9767] RAX: ffffffffffffffda RBX: 00007fff6ad34ed0 RCX: 0000000000441f30 [ 94.968802][ T9767] RDX: 0000000000000001 RSI: 00007fff6ad34f00 RDI: 00000000000000f0 [ 94.976761][ T9767] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 94.984871][ T9767] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000001716d [ 94.992826][ T9767] R13: 0000000000402d80 R14: 0000000000000000 R15: 0000000000000000 [ 95.000785][ T9767] Modules linked in: [ 95.004661][ T9767] CR2: ffff887f9fa13fff [ 95.008803][ T9767] ---[ end trace c0a345d4470d5f70 ]--- [ 95.014250][ T9767] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 95.020383][ T9767] 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 [ 95.040024][ T9767] RSP: 0018:ffffc90000f77770 EFLAGS: 00010246 [ 95.046071][ T9767] RAX: dffffc0000000000 RBX: ffff88809fa04000 RCX: ffffffff0000feff [ 95.054031][ T9767] RDX: 1ffff10ff3f427ff RSI: ffff8880950496b0 RDI: 0000000000000005 [ 95.061986][ T9767] RBP: ffffc90000f778b0 R08: ffff88809fc4e140 R09: ffffed1013f4085d [ 95.069936][ T9767] R10: ffffed1013f4085c R11: ffff88809fa042e3 R12: ffff887f9fa13fff [ 95.077888][ T9767] R13: 0000000000000100 R14: ffff88809fa13fff R15: ffff888095049640 [ 95.085890][ T9767] FS: 00000000014a6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 95.094831][ T9767] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.101440][ T9767] CR2: ffff887f9fa13fff CR3: 00000000a928d000 CR4: 00000000001406e0 [ 95.109434][ T9767] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.117388][ T9767] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.125345][ T9767] Kernel panic - not syncing: Fatal exception in interrupt [ 95.134102][ T9767] Kernel Offset: disabled [ 95.138530][ T9767] Rebooting in 86400 seconds..