BUG: unable to handle kernel paging request at ffffc900127c5000
IP: memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65
PGD 1dc24b067 P4D 1dc24b067 PUD 1dc24e067 PMD 14bdeb067 PTE 0
Oops: 0002 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7867 Comm: syz-executor7 Not tainted 4.16.0+ #87
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:ffff8801452ff460 EFLAGS: 00010282
RAX: ffff8801fdcef900 RBX: 000000000011e300 RCX: 000000000011e300
RDX: 000000000011e300 RSI: 0000000000000000 RDI: ffffc900127c5000
RBP: ffff8801452ff4a0 R08: 0000000000000000 R09: ffffc900127c5000
R10: 0000000000000000 R11: 0000000000000004 R12: ffffc900127c5000
R13: 000000008acef901 R14: ffffc900127c5000 R15: 000000000011e300
FS:  00007ffb281f2700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900127c5000 CR3: 0000000147d54000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 snd_pcm_format_set_silence+0x1fa/0x4f0 sound/core/pcm_misc.c:431
 loopback_prepare+0x4ef/0x10b0 sound/drivers/aloop.c:347
 snd_pcm_do_prepare sound/core/pcm_native.c:1640 [inline]
 snd_pcm_action_single sound/core/pcm_native.c:1084 [inline]
 snd_pcm_action_nonatomic sound/core/pcm_native.c:1151 [inline]
 snd_pcm_prepare sound/core/pcm_native.c:1687 [inline]
 snd_pcm_kernel_ioctl+0xe58/0x2940 sound/core/pcm_native.c:2998
 snd_pcm_oss_prepare sound/core/oss/pcm_oss.c:1104 [inline]
 snd_pcm_oss_make_ready sound/core/oss/pcm_oss.c:1132 [inline]
 snd_pcm_oss_set_trigger+0x5a6/0x1200 sound/core/oss/pcm_oss.c:1959
 snd_pcm_oss_poll+0xaf5/0xe10 sound/core/oss/pcm_oss.c:2727
 do_pollfd fs/select.c:826 [inline]
 do_poll fs/select.c:877 [inline]
 do_sys_poll+0x125c/0x20e0 fs/select.c:971
 SYSC_poll+0x2d2/0x560 fs/select.c:1029
 SyS_poll+0x54/0x80 fs/select.c:1017
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455979
RSP: 002b:00007ffb281f1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: ffffffffffffffda RBX: 00007ffb281f26d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020ce5fd8
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b0 R14: 00000000006fb120 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: ffff8801452ff460
CR2: ffffc900127c5000
---[ end trace a51cd09c935a42ef ]---