[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.137' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.314291][ T7068] IPVS: ftp: loaded support on port[0] = 21 [ 65.406226][ T7092] BUG: unable to handle page fault for address: ffff887f94cd7fff [ 65.414060][ T7092] #PF: supervisor read access in kernel mode [ 65.420136][ T7092] #PF: error_code(0x0000) - not-present page [ 65.426103][ T7092] PGD 0 P4D 0 [ 65.429466][ T7092] Oops: 0000 [#1] PREEMPT SMP KASAN [ 65.434738][ T7092] CPU: 1 PID: 7092 Comm: syz-executor786 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 65.444593][ T7092] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.454646][ T7092] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 65.460785][ T7092] Code: 4c 89 f8 4c 29 f0 4c 89 ac 24 b0 00 00 00 48 89 84 24 b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 bd 10 00 00 <49> 8b 45 00 49 8d 7d 0c 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 [ 65.480381][ T7092] RSP: 0018:ffffc900053b7648 EFLAGS: 00010246 [ 65.486475][ T7092] RAX: dffffc0000000000 RBX: ffff888094cd7fff RCX: 00000000ffff0101 [ 65.494437][ T7092] RDX: 1ffff10ff299afff RSI: ffffffff8627a6d0 RDI: 0000000000000005 [ 65.502466][ T7092] RBP: ffff88808fa64a40 R08: ffff888094400340 R09: ffffed10129997dd [ 65.510530][ T7092] R10: ffff888094ccbee3 R11: ffffed10129997dc R12: ffffc90000e8e000 [ 65.519620][ T7092] R13: ffff887f94cd7fff R14: 0000000000000100 R15: ffff888094cc8100 [ 65.527619][ T7092] FS: 00007effdaad1700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 65.536685][ T7092] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.543269][ T7092] CR2: ffff887f94cd7fff CR3: 0000000094697000 CR4: 00000000001406e0 [ 65.551337][ T7092] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.559294][ T7092] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.567330][ T7092] Call Trace: [ 65.570616][ T7092] ? tun_get_user+0x2896/0x3c70 [ 65.575454][ T7092] ? generic_xdp_tx+0x710/0x710 [ 65.580290][ T7092] ? rcu_read_lock_held+0x9c/0xb0 [ 65.585290][ T7092] do_xdp_generic+0x2b/0x40 [ 65.589769][ T7092] tun_get_user+0x2993/0x3c70 [ 65.594599][ T7092] ? tun_build_skb.isra.0+0x13e0/0x13e0 [ 65.600122][ T7092] ? tun_get+0x16d/0x290 [ 65.604364][ T7092] ? rcu_read_lock_held_common+0x130/0x130 [ 65.610285][ T7092] tun_chr_write_iter+0xba/0x151 [ 65.615223][ T7092] new_sync_write+0x4a2/0x700 [ 65.619882][ T7092] ? new_sync_read+0x7a0/0x7a0 [ 65.624622][ T7092] ? pipe_lock+0x5a/0x70 [ 65.628857][ T7092] ? lock_release+0x800/0x800 [ 65.633511][ T7092] __vfs_write+0xc9/0x100 [ 65.637817][ T7092] __kernel_write+0x11c/0x3a0 [ 65.642468][ T7092] write_pipe_buf+0x153/0x1e0 [ 65.647129][ T7092] ? do_splice_direct+0x280/0x280 [ 65.652137][ T7092] ? splice_from_pipe_next.part.0+0x29c/0x350 [ 65.658177][ T7092] __splice_from_pipe+0x3e6/0x7b0 [ 65.663174][ T7092] ? do_splice_direct+0x280/0x280 [ 65.668173][ T7092] ? do_splice_direct+0x280/0x280 [ 65.673169][ T7092] splice_from_pipe+0xd9/0x140 [ 65.677919][ T7092] ? splice_shrink_spd+0xc0/0xc0 [ 65.682850][ T7092] ? security_file_permission+0x8c/0x470 [ 65.688458][ T7092] default_file_splice_write+0x37/0x90 [ 65.693909][ T7092] ? generic_splice_sendpage+0x40/0x40 [ 65.701080][ T7092] do_splice+0xb38/0x1560 [ 65.705393][ T7092] ? __fget_files+0x32f/0x500 [ 65.710059][ T7092] ? do_dup2+0x520/0x520 [ 65.714288][ T7092] ? default_file_splice_write+0x90/0x90 [ 65.719919][ T7092] __x64_sys_splice+0x2c1/0x330 [ 65.724752][ T7092] do_syscall_64+0xf6/0x7d0 [ 65.729243][ T7092] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 65.735107][ T7092] RIP: 0033:0x4464c9 [ 65.738975][ T7092] Code: e8 1c ba 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.759606][ T7092] RSP: 002b:00007effdaad0d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 65.768003][ T7092] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 00000000004464c9 [ 65.776085][ T7092] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 65.784047][ T7092] RBP: 00000000006dbc70 R08: 0000000000010008 R09: 0000000000000000 [ 65.791997][ T7092] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 65.799959][ T7092] R13: 0000000000003172 R14: 656c6c616b7a7973 R15: 0000000000000064 [ 65.808125][ T7092] Modules linked in: [ 65.812000][ T7092] CR2: ffff887f94cd7fff [ 65.816148][ T7092] ---[ end trace 74eb572a0fb95646 ]--- [ 65.821586][ T7092] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 65.827733][ T7092] Code: 4c 89 f8 4c 29 f0 4c 89 ac 24 b0 00 00 00 48 89 84 24 b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 bd 10 00 00 <49> 8b 45 00 49 8d 7d 0c 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 [ 65.847487][ T7092] RSP: 0018:ffffc900053b7648 EFLAGS: 00010246 [ 65.853525][ T7092] RAX: dffffc0000000000 RBX: ffff888094cd7fff RCX: 00000000ffff0101 [ 65.861498][ T7092] RDX: 1ffff10ff299afff RSI: ffffffff8627a6d0 RDI: 0000000000000005 [ 65.869455][ T7092] RBP: ffff88808fa64a40 R08: ffff888094400340 R09: ffffed10129997dd [ 65.877417][ T7092] R10: ffff888094ccbee3 R11: ffffed10129997dc R12: ffffc90000e8e000 [ 65.885363][ T7092] R13: ffff887f94cd7fff R14: 0000000000000100 R15: ffff888094cc8100 [ 65.893313][ T7092] FS: 00007effdaad1700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 65.902216][ T7092] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.908903][ T7092] CR2: ffff887f94cd7fff CR3: 0000000094697000 CR4: 00000000001406e0 [ 65.916857][ T7092] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.924816][ T7092] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.932770][ T7092] Kernel panic - not syncing: Fatal exception in interrupt [ 65.941321][ T7092] Kernel Offset: disabled [ 65.945668][ T7092] Rebooting in 86400 seconds..