BUG: kernel NULL pointer dereference, address: 0000000000000010
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 10f36d067 P4D 10f36d067 PUD 10ee5c067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 17060 Comm: syz-executor.2 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:snd_ctl_release+0x1d/0x120 sound/core/control.c:114
Code: 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 49 89 f4 55 53 48 8b 9e b0 01 00 00 48 c7 86 b0 01 00 00 00 00 00 00 <48> 8b 6b 10 4c 8d ad 48 07 00 00 4c 89 ef e8 b0 7c 8a 00 48 89 df
RSP: 0018:ffffc9000238be80 EFLAGS: 00010282
RAX: ffffffff827a3bb0 RBX: 0000000000000000 RCX: ffffc9000238be24
RDX: 0000000000000000 RSI: ffff8881218e7e00 RDI: ffff8881255dfba0
RBP: 00000000002a0001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 9a7ba35b2ac72ee4 R12: ffff8881218e7e00
R13: ffff88812a944460 R14: ffff8881288d4618 R15: 0000000000000000
FS:  00007fa1169c5700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000010f279000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __fput+0xaa/0x250 fs/file_table.c:281
 task_work_run+0x68/0xb0 kernel/task_work.c:141
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:139 [inline]
 exit_to_user_mode_prepare+0x1e2/0x1f0 kernel/entry/common.c:166
 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:241
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa1169c4c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: 0000000000000000 RBX: 0000000000002ac0 RCX: 000000000045d5b9
RDX: 0000000000000004 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007fa1169c59c0 R15: 000000000118cf4c
Modules linked in:
CR2: 0000000000000010
---[ end trace 33939c14a4d85cad ]---
RIP: 0010:snd_ctl_release+0x1d/0x120 sound/core/control.c:114
Code: 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 49 89 f4 55 53 48 8b 9e b0 01 00 00 48 c7 86 b0 01 00 00 00 00 00 00 <48> 8b 6b 10 4c 8d ad 48 07 00 00 4c 89 ef e8 b0 7c 8a 00 48 89 df
RSP: 0018:ffffc9000238be80 EFLAGS: 00010282
RAX: ffffffff827a3bb0 RBX: 0000000000000000 RCX: ffffc9000238be24
RDX: 0000000000000000 RSI: ffff8881218e7e00 RDI: ffff8881255dfba0
RBP: 00000000002a0001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 9a7ba35b2ac72ee4 R12: ffff8881218e7e00
R13: ffff88812a944460 R14: ffff8881288d4618 R15: 0000000000000000
FS:  00007fa1169c5700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005639e0268160 CR3: 000000010f279000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400