BUG: unable to handle kernel paging request at ffffc90001366000
IP: memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65
PGD 1db12c067 P4D 1db12c067 PUD 1db12d067 PMD 1d6a32067 PTE 0
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 13642 Comm: syz-executor5 Not tainted 4.15.0-rc6-next-20180103+ #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:ffff8801a84878d8 EFLAGS: 00010246
RAX: fffff5200426ca80 RBX: ffffc9000136501f RCX: 000000001ffff010
RDX: 000000001ffffff1 RSI: 0000000000000080 RDI: ffffc90001366000
RBP: ffff8801a84878f8 R08: fffff5200426ca02 R09: ffffc9000136501f
R10: 0000000000000000 R11: fffff5200426ca01 R12: 000000001ffffff1
R13: 0000000000000080 R14: ffffffff8646aed0 R15: 0000000000000008
FS:  00007fa4628e3700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90001366000 CR3: 0000000005e22003 CR4: 00000000001606f0
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
 snd_pcm_oss_sync+0x4c3/0x710 sound/core/oss/pcm_oss.c:1587
 snd_pcm_oss_release+0x20b/0x280 sound/core/oss/pcm_oss.c:2430
 __fput+0x291/0x6e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x122/0x1a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x7f4/0x2da0 kernel/exit.c:869
 do_group_exit+0x108/0x320 kernel/exit.c:972
 get_signal+0x5e9/0x1460 kernel/signal.c:2337
 do_signal+0x7f/0x1980 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x1aa/0x210 arch/x86/entry/common.c:161
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x383/0x430 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x98/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007fa4628e2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffa1 RBX: 000000000071bf58 RCX: 0000000000452ac9
RDX: 0000000000000300 RSI: 0000000000000002 RDI: 0000000000000011
RBP: 000000000000059c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020013000 R11: 0000000000000212 R12: 00000000006f6740
R13: 00000000ffffffff R14: 00007fa4628e36d4 R15: 0000000000000002
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: ffff8801a84878d8
CR2: ffffc90001366000
---[ end trace 221cd18f8274699e ]---