BUG: unable to handle kernel paging request at ffffc90005cfb000
IP: memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65
PGD 1dad2c067 P4D 1dad2c067 PUD 1dad2d067 PMD 1c30a0067 PTE 0
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 18134 Comm: syz-executor4 Not tainted 4.15.0-rc8-next-20180118+ #100
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65
RSP: 0018:ffff8801c7987508 EFLAGS: 00010246
RAX: fffff52000bd2900 RBX: ffffc90005cfa000 RCX: 0000000000199e00
RDX: 000000000019ae00 RSI: 0000000000000000 RDI: ffffc90005cfb000
RBP: ffff8801c7987528 R08: 0000000000000000 R09: ffffc90005cfa000
R10: 00000000000335c0 R11: fffff52000bd29bf R12: 000000000019ae00
R13: 0000000000000000 R14: ffffffff86e7249c R15: 0000000000000010
FS:  00007f039a9dd700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90005cfb000 CR3: 00000001c9b24005 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memset include/linux/string.h:329 [inline]
 snd_pcm_format_set_silence+0x13f/0x4b0 sound/core/pcm_misc.c:431
 loopback_prepare+0x922/0xbe0 sound/drivers/aloop.c:340
 snd_pcm_do_prepare+0x58/0x90 sound/core/pcm_native.c:1640
 snd_pcm_action_single+0x70/0x110 sound/core/pcm_native.c:1084
 snd_pcm_action_nonatomic+0x95/0xa0 sound/core/pcm_native.c:1151
 snd_pcm_prepare+0x115/0x1a0 sound/core/pcm_native.c:1687
 snd_pcm_kernel_ioctl+0x97/0x240 sound/core/pcm_native.c:2998
 snd_pcm_oss_prepare+0x49/0x150 sound/core/oss/pcm_oss.c:1104
 snd_pcm_oss_make_ready+0xf9/0x130 sound/core/oss/pcm_oss.c:1132
 snd_pcm_oss_set_trigger+0x62d/0x830 sound/core/oss/pcm_oss.c:1957
 snd_pcm_oss_poll+0x77c/0xd20 sound/core/oss/pcm_oss.c:2725
 do_pollfd fs/select.c:826 [inline]
 do_poll fs/select.c:877 [inline]
 do_sys_poll+0x716/0x1050 fs/select.c:971
 SYSC_poll fs/select.c:1029 [inline]
 SyS_poll+0x10d/0x450 fs/select.c:1017
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452e99
RSP: 002b:00007f039a9dcc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000007
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452e99
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000002023a000
RBP: 00000000000003bb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3a28
R13: 00000000ffffffff R14: 00007f039a9dd6d4 R15: 0000000000000000
Code: 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 
RIP: memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 RSP: ffff8801c7987508
CR2: ffffc90005cfb000
---[ end trace cc888c3153debd8a ]---