Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 1 UID: 0 PID: 9020 Comm: syz.0.678 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:snd_pcm_timer_resolution+0x48/0xb0 sound/core/pcm_timer.c:57
Code: c0 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 c8 77 c7 f8 41 be c0 00 00 00 4c 03 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 a9 77 c7 f8 49 8b 1e 48 85 db 74
RSP: 0018:ffffc900038af990 EFLAGS: 00010016
RAX: 0000000000000018 RBX: ffff88807c3270c0 RCX: 0000000000080000
RDX: ffffc90010a92000 RSI: 000000000000280b RDI: 000000000000280c
RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff89704d60 R12: ffff88807c327130
R13: ffffffff89704d60 R14: 00000000000000c0 R15: dffffc0000000000
FS:  00007f8adc2096c0(0000) GS:ffff888124dd6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc6c7027dac CR3: 0000000073674000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 snd_timer_hw_resolution sound/core/timer.c:551 [inline]
 snd_timer_proc_read+0x30c/0x750 sound/core/timer.c:1338
 snd_info_seq_show+0xd9/0x100 sound/core/info.c:342
 seq_read_iter+0x463/0xca0 fs/seq_file.c:231
 seq_read+0x367/0x480 fs/seq_file.c:163
 pde_read fs/proc/inode.c:308 [inline]
 proc_reg_read+0x1e9/0x2e0 fs/proc/inode.c:320
 vfs_read+0x213/0xa80 fs/read_write.c:572
 ksys_read+0x150/0x270 fs/read_write.c:716
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8adb39e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8adc209028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f8adb626180 RCX: 00007f8adb39e159
RDX: 0000000000002020 RSI: 00002000000035c0 RDI: 0000000000000005
RBP: 00007f8adb435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8adb626218 R14: 00007f8adb626180 R15: 00007ffc02fb3198
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:snd_pcm_timer_resolution+0x48/0xb0 sound/core/pcm_timer.c:57
Code: c0 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 c8 77 c7 f8 41 be c0 00 00 00 4c 03 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 a9 77 c7 f8 49 8b 1e 48 85 db 74
RSP: 0018:ffffc900038af990 EFLAGS: 00010016
RAX: 0000000000000018 RBX: ffff88807c3270c0 RCX: 0000000000080000
RDX: ffffc90010a92000 RSI: 000000000000280b RDI: 000000000000280c
RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff89704d60 R12: ffff88807c327130
R13: ffffffff89704d60 R14: 00000000000000c0 R15: dffffc0000000000
FS:  00007f8adc2096c0(0000) GS:ffff888124dd6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc6c7027dac CR3: 0000000073674000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	c0 00 00             	rolb   $0x0,(%rax)
   3:	00 48 89             	add    %cl,-0x77(%rax)
   6:	d8 48 c1             	fmuls  -0x3f(%rax)
   9:	e8 03 42 80 3c       	call   0x3c804211
   e:	38 00                	cmp    %al,(%rax)
  10:	74 08                	je     0x1a
  12:	48 89 df             	mov    %rbx,%rdi
  15:	e8 c8 77 c7 f8       	call   0xf8c777e2
  1a:	41 be c0 00 00 00    	mov    $0xc0,%r14d
  20:	4c 03 33             	add    (%rbx),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 a9 77 c7 f8       	call   0xf8c777e2
  39:	49 8b 1e             	mov    (%r14),%rbx
  3c:	48 85 db             	test   %rbx,%rbx
  3f:	74                   	.byte 0x74