[  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 '10.128.0.210' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   39.293401] audit: type=1400 audit(1601835802.292:8): avc:  denied  { execmem } for  pid=6500 comm="syz-executor976" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   39.299813] ================================================================================
[   39.321927] UBSAN: Undefined behaviour in ./include/linux/log2.h:61:13
[   39.328751] shift exponent 64 is too large for 64-bit type 'long unsigned int'
[   39.336092] CPU: 1 PID: 6500 Comm: syz-executor976 Not tainted 4.19.149-syzkaller #0
[   39.343949] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.353277] Call Trace:
[   39.355858]  dump_stack+0x22c/0x33e
[   39.359467]  ubsan_epilogue+0xe/0x3a
[   39.363161]  __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250
[   39.369325]  ? yenta_set_socket+0x1d6/0xb10
[   39.373657]  ? rate_src_frames+0x21f/0x2a0
[   39.377869]  ? rate_transfer+0x2b0/0x2b0
[   39.381950]  ? plug_client_size+0x1ca/0x3e0
[   39.386252]  snd_pcm_oss_change_params_locked.cold+0x6d/0x11a
[   39.392164]  ? snd_pcm_oss_open+0x50/0x50
[   39.396288]  ? snd_pcm_oss_get_active_substream+0x142/0x1c0
[   39.402016]  ? ww_mutex_unlock+0x2f0/0x2f0
[   39.406236]  ? __mutex_unlock_slowpath+0xea/0x660
[   39.411061]  snd_pcm_oss_get_active_substream+0x164/0x1c0
[   39.416578]  snd_pcm_oss_set_channels+0x244/0x380
[   39.421400]  ? snd_pcm_oss_get_formats+0x340/0x340
[   39.426345]  snd_pcm_oss_ioctl+0x12dd/0x33c0
[   39.430737]  ? find_held_lock+0x2d/0x110
[   39.434805]  ? snd_pcm_oss_release+0x300/0x300
[   39.439366]  ? debug_check_no_obj_freed+0x201/0x482
[   39.444360]  ? lock_downgrade+0x750/0x750
[   39.448485]  ? snd_pcm_oss_release+0x300/0x300
[   39.453047]  do_vfs_ioctl+0xcdb/0x12e0
[   39.456934]  ? selinux_file_ioctl+0x44f/0x5e0
[   39.461417]  ? ioctl_preallocate+0x200/0x200
[   39.465805]  ? selinux_parse_skb.constprop.0+0x1f0/0x1f0
[   39.471241]  ? pick_link+0x6d6/0xae0
[   39.474932]  ? putname+0xe1/0x130
[   39.478363]  ? rcu_read_lock_sched_held+0x174/0x1e0
[   39.483473]  ? putname+0xe1/0x130
[   39.486910]  ksys_ioctl+0x9b/0xc0
[   39.490348]  __x64_sys_ioctl+0x6f/0xb0
[   39.494213]  do_syscall_64+0xf9/0x670
[   39.497994]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.503161] RIP: 0033:0x440269
[   39.506343] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   39.525220] RSP: 002b:00007ffc8b5f81a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   39.532923] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269
[   39.540169] RDX: 0000000020000000 RSI: 00000000c