[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   51.265478] audit: type=1400 audit(1602248837.247:8): avc:  denied  { execmem } for  pid=6499 comm="syz-executor377" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   51.282902] ================================================================================
[   51.294065] UBSAN: Undefined behaviour in fs/jfs/jfs_imap.c:458:7
[   51.300308] shift exponent -1 is negative
[   51.304467] CPU: 1 PID: 6499 Comm: syz-executor377 Not tainted 4.19.150-syzkaller #0
[   51.312351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.321713] Call Trace:
[   51.324393]  dump_stack+0x22c/0x33e
[   51.328027]  ubsan_epilogue+0xe/0x3a
[   51.331891]  __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250
[   51.338045]  ? do_raw_spin_unlock+0x171/0x240
[   51.342530]  diReadSpecial.cold+0x1b/0x3e
[   51.346672]  jfs_mount+0x83/0x3d0
[   51.350114]  jfs_fill_super+0x55c/0xb50
[   51.354078]  ? parse_options+0xf50/0xf50
[   51.358129]  ? set_blocksize+0x163/0x3f0
[   51.362201]  mount_bdev+0x2fc/0x3b0
[   51.365819]  ? parse_options+0xf50/0xf50
[   51.369871]  mount_fs+0xa3/0x318
[   51.373235]  vfs_kern_mount.part.0+0x68/0x470
[   51.377739]  do_mount+0x51c/0x2f10
[   51.381288]  ? do_raw_spin_unlock+0x171/0x240
[   51.385790]  ? check_preemption_disabled+0x41/0x2b0
[   51.390814]  ? copy_mount_string+0x40/0x40
[   51.395050]  ? kmem_cache_alloc_trace+0x379/0x4b0
[   51.399894]  ? copy_mount_options+0x261/0x370
[   51.404381]  ksys_mount+0xcf/0x130
[   51.407913]  __x64_sys_mount+0xba/0x150
[   51.411894]  ? lockdep_hardirqs_on+0x3c1/0x5e0
[   51.416470]  do_syscall_64+0xf9/0x670
[   51.420268]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.425445] RIP: 0033:0x44cb0a
[   51.428636] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00
[   51.447547] RSP: 002b:00007fff6e79a438 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5
[   51.455253] RAX: ffffffffffffffda RBX: 00007fff6e79a490 RCX: 000000000044cb0a
[   51.462531] RDX: 0000000020000000 RSI: 000