[ 84.247383][ T27] audit: type=1800 audit(1581912890.720:25): pid=9832 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[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.319755][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 85.319767][ T27] audit: type=1800 audit(1581912891.790:29): pid=9832 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 [ 85.346023][ T27] audit: type=1800 audit(1581912891.790:30): pid=9832 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 '10.128.0.228' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 111.127887][ T9988] IPVS: ftp: loaded support on port[0] = 21 [ 111.182103][ T9990] BUG: unable to handle page fault for address: ffff887f94e367ff [ 111.190058][ T9990] #PF: supervisor read access in kernel mode [ 111.196218][ T9990] #PF: error_code(0x0000) - not-present page [ 111.202179][ T9990] PGD 0 P4D 0 [ 111.205559][ T9990] Oops: 0000 [#1] PREEMPT SMP KASAN [ 111.210740][ T9990] CPU: 0 PID: 9990 Comm: syz-executor658 Not tainted 5.6.0-rc1-next-20200214-syzkaller #0 [ 111.220605][ T9990] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.230795][ T9990] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 111.237105][ T9990] Code: ff 48 c1 ea 03 48 89 85 e8 fe ff ff 4c 89 f8 4c 29 f0 48 89 45 80 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 11 00 00 <48> 8b 03 48 8d 7b 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 d8 fe [ 111.256866][ T9990] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 111.263084][ T9990] RAX: dffffc0000000000 RBX: ffff887f94e367ff RCX: 00000000ffff0101 [ 111.271319][ T9990] RDX: 1ffff10ff29c6cff RSI: ffffffff863b2840 RDI: 0000000000000005 [ 111.279619][ T9990] RBP: ffffc90000e778b0 R08: ffff8880a7ff6340 R09: ffffed10129c4d5d [ 111.287580][ T9990] R10: ffffed10129c4d5c R11: ffff888094e26ae3 R12: ffff88809d52ca80 [ 111.295542][ T9990] R13: 0000000000000000 R14: 0000000000000100 R15: ffff888094e26900 [ 111.303504][ T9990] FS: 0000000001ca4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 111.312429][ T9990] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 111.319135][ T9990] CR2: ffff887f94e367ff CR3: 0000000097bd6000 CR4: 00000000001406f0 [ 111.327221][ T9990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 111.335239][ T9990] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 111.343218][ T9990] Call Trace: [ 111.346508][ T9990] ? generic_xdp_tx+0x740/0x740 [ 111.351404][ T9990] ? rcu_read_lock_held+0x9c/0xb0 [ 111.356420][ T9990] do_xdp_generic+0x30/0x50 [ 111.360956][ T9990] tun_get_user+0x2bcd/0x4020 [ 111.365629][ T9990] ? aa_file_perm+0x62b/0x1600 [ 111.370555][ T9990] ? tun_build_skb.isra.0+0x1480/0x1480 [ 111.376211][ T9990] ? rcu_read_lock_held+0x9c/0xb0 [ 111.381232][ T9990] ? __kasan_check_read+0x11/0x20 [ 111.386250][ T9990] tun_chr_write_iter+0xbd/0x156 [ 111.391180][ T9990] do_iter_readv_writev+0x5f8/0x8f0 [ 111.396378][ T9990] ? no_seek_end_llseek_size+0x70/0x70 [ 111.402842][ T9990] ? apparmor_file_permission+0x27/0x30 [ 111.408441][ T9990] ? rw_verify_area+0x126/0x360 [ 111.413416][ T9990] do_iter_write+0x184/0x610 [ 111.418003][ T9990] ? dup_iter+0x260/0x260 [ 111.422334][ T9990] vfs_writev+0x1b3/0x2f0 [ 111.426770][ T9990] ? vfs_iter_write+0xb0/0xb0 [ 111.431618][ T9990] ? lock_downgrade+0x920/0x920 [ 111.436454][ T9990] ? handle_mm_fault+0x292/0xa50 [ 111.441431][ T9990] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 111.447774][ T9990] ? __fget_light+0x1ad/0x270 [ 111.452441][ T9990] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 111.458668][ T9990] do_writev+0x15b/0x330 [ 111.462898][ T9990] ? vfs_writev+0x2f0/0x2f0 [ 111.467384][ T9990] ? do_syscall_64+0x26/0x790 [ 111.472053][ T9990] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 111.478123][ T9990] ? do_syscall_64+0x26/0x790 [ 111.482921][ T9990] __x64_sys_writev+0x75/0xb0 [ 111.487591][ T9990] do_syscall_64+0xfa/0x790 [ 111.492089][ T9990] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 111.498006][ T9990] RIP: 0033:0x441f30 [ 111.501891][ T9990] 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 [ 111.521656][ T9990] RSP: 002b:00007ffd29b04ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 111.530058][ T9990] RAX: ffffffffffffffda RBX: 00007ffd29b04b00 RCX: 0000000000441f30 [ 111.538236][ T9990] RDX: 0000000000000001 RSI: 00007ffd29b04b30 RDI: 00000000000000f0 [ 111.546311][ T9990] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 111.554270][ T9990] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000001b221 [ 111.562223][ T9990] R13: 0000000000402d80 R14: 0000000000000000 R15: 0000000000000000 [ 111.570536][ T9990] Modules linked in: [ 111.574421][ T9990] CR2: ffff887f94e367ff [ 111.578563][ T9990] ---[ end trace 035dcba28d400bee ]--- [ 111.584110][ T9990] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 111.590249][ T9990] Code: ff 48 c1 ea 03 48 89 85 e8 fe ff ff 4c 89 f8 4c 29 f0 48 89 45 80 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 11 00 00 <48> 8b 03 48 8d 7b 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 d8 fe [ 111.610986][ T9990] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 111.617088][ T9990] RAX: dffffc0000000000 RBX: ffff887f94e367ff RCX: 00000000ffff0101 [ 111.625321][ T9990] RDX: 1ffff10ff29c6cff RSI: ffffffff863b2840 RDI: 0000000000000005 [ 111.633282][ T9990] RBP: ffffc90000e778b0 R08: ffff8880a7ff6340 R09: ffffed10129c4d5d [ 111.643131][ T9990] R10: ffffed10129c4d5c R11: ffff888094e26ae3 R12: ffff88809d52ca80 [ 111.651149][ T9990] R13: 0000000000000000 R14: 0000000000000100 R15: ffff888094e26900 [ 111.659127][ T9990] FS: 0000000001ca4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 111.668151][ T9990] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 111.674719][ T9990] CR2: ffff887f94e367ff CR3: 0000000097bd6000 CR4: 00000000001406f0 [ 111.682725][ T9990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 111.691238][ T9990] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 111.699210][ T9990] Kernel panic - not syncing: Fatal exception in interrupt [ 111.708238][ T9990] Kernel Offset: disabled [ 111.712573][ T9990] Rebooting in 86400 seconds..