[ 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 '10.128.15.197' (ECDSA) to the list of known hosts. syzkaller login: [ 541.078458] IPVS: ftp: loaded support on port[0] = 21 [ 541.111604] IPVS: ftp: loaded support on port[0] = 21 [ 541.145568] IPVS: ftp: loaded support on port[0] = 21 [ 541.179566] IPVS: ftp: loaded support on port[0] = 21 [ 541.214523] IPVS: ftp: loaded support on port[0] = 21 executing program [ 541.251634] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 781.348483] BUG: unable to handle kernel paging request at ffff888001000180 [ 781.348503] IP: cfb_imageblit+0xa30/0xe40 [ 781.348506] PGD c9c5067 P4D c9c5067 PUD c9c6067 PMD 80000000010001e1 [ 781.348518] Oops: 0003 [#1] PREEMPT SMP KASAN [ 781.348522] Modules linked in: [ 781.348531] CPU: 0 PID: 9657 Comm: agetty Not tainted 4.14.212-syzkaller #0 [ 781.348534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.348538] task: ffff8880a0f80400 task.stack: ffff88808fdd8000 [ 781.348545] RIP: 0010:cfb_imageblit+0xa30/0xe40 [ 781.348548] RSP: 0018:ffff88808fddf6e0 EFLAGS: 00010297 [ 781.348554] RAX: ffff888001000184 RBX: 000000000000001c RCX: 000000000000001c [ 781.348559] RDX: 0000000000000000 RSI: ffff888001000180 RDI: dffffc0000000000 [ 781.348562] RBP: 0000000000000000 R08: ffff888238869faf R09: 0000000000000000 [ 781.348566] R10: ffff8880a0f80d00 R11: 0000000000000000 R12: ffff888238869fa4 [ 781.348570] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 781.348576] FS: 00007fdccfe7e500(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 781.348580] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 781.348584] CR2: ffff888001000180 CR3: 00000000a0852000 CR4: 00000000001406f0 [ 781.348593] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 781.348597] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 781.348599] Call Trace: [ 781.348615] vga16fb_imageblit+0x630/0x2140 [ 781.348624] ? __up_console_sem+0xa9/0x1b0 [ 781.348630] ? console_unlock+0x557/0xf20 [ 781.348635] ? fb_pad_aligned_buffer+0xbf/0x110 [ 781.348639] soft_cursor+0x50a/0xa50 [ 781.348644] ? console_unlock+0xc72/0xf20 [ 781.348648] ? lock_downgrade+0x740/0x740 [ 781.348652] bit_cursor+0xf7a/0x1580 [ 781.348657] ? bit_update_start+0x1f0/0x1f0 [ 781.348663] ? fb_get_color_depth+0x100/0x200 [ 781.348667] ? get_color+0x1be/0x3a0 [ 781.348671] ? bit_update_start+0x1f0/0x1f0 [ 781.348674] fbcon_cursor+0x480/0x640 [ 781.348680] ? add_softcursor+0x14/0x2d0 [ 781.348684] set_cursor+0x189/0x1e0 [ 781.348688] con_write+0x81/0xa0 [ 781.348694] do_output_char+0x4f5/0x750 [ 781.348699] __process_echoes+0x313/0x8c0 [ 781.348705] n_tty_receive_buf_common+0x9a3/0x25a0 [ 781.348713] ? n_tty_receive_buf2+0x40/0x40 [ 781.348717] tty_ioctl+0xe5a/0x13c0 [ 781.348721] ? n_tty_poll+0x7d0/0x7d0 [ 781.348724] ? tty_fasync+0x2c0/0x2c0 [ 781.348728] ? ldsem_up_read+0x1d/0x60 [ 781.348738] ? get_seconds+0x5/0x10 [ 781.348741] ? tty_read+0x1c7/0x260 [ 781.348745] ? copy_from_read_buf+0x430/0x430 [ 781.348750] ? fsnotify+0x974/0x11b0 [ 781.348754] ? hung_up_tty_compat_ioctl+0x30/0x30 [ 781.348759] ? tty_fasync+0x2c0/0x2c0 [ 781.348767] do_vfs_ioctl+0x75a/0xff0 [ 781.348775] ? security_file_permission+0x82/0x1e0 [ 781.348782] ? ioctl_preallocate+0x1a0/0x1a0 [ 781.348789] ? rw_verify_area+0xe1/0x2a0 [ 781.348796] ? vfs_read+0x104/0x340 [ 781.348805] ? SyS_read+0x14d/0x210 [ 781.348811] ? security_file_ioctl+0x83/0xb0 [ 781.348818] SyS_ioctl+0x7f/0xb0 [ 781.348823] ? do_vfs_ioctl+0xff0/0xff0 [ 781.348831] do_syscall_64+0x1d5/0x640 [ 781.348842] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 781.348848] RIP: 0033:0x7fdccf9a2017 [ 781.348851] RSP: 002b:00007ffc54d47918 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 781.348858] RAX: ffffffffffffffda RBX: 00007ffc54d47b5d RCX: 00007fdccf9a2017 [ 781.348862] RDX: 00007ffc54d47b5c RSI: 0000000000005412 RDI: 0000000000000000 [ 781.348866] RBP: 00007ffc54d47ba0 R08: ffffffffffffff98 R09: 00007ffc54d47990 [ 781.348870] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc54d47934 [ 781.348874] R13: 00007ffc54d47a90 R14: 00007ffc54d47990 R15: 0000000000000000 [ 781.348881] Code: 45 7c 24 20 e8 02 26 15 fe 89 d9 44 89 f8 d3 e0 41 09 c5 39 5c 24 08 0f 87 76 ff ff ff e8 e9 25 15 fe 48 8b 74 24 10 48 8d 46 04 <44> 89 2e 39 5c 24 08 0f 85 44 ff ff ff 45 31 ed 48 89 44 24 10 [ 781.348960] RIP: cfb_imageblit+0xa30/0xe40 RSP: ffff88808fddf6e0 [ 781.348961] CR2: ffff888001000180 [ 781.348969] ---[ end trace 7fb458dd46aa49d2 ]--- [ 781.348971] Kernel panic - not syncing: Fatal exception [ 781.349559] Kernel Offset: disabled [ 781.738080] Rebooting in 86400 seconds..