program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/platform/devices/pcspkr/driver_override\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='snd_dummy\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/snd_dummy/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='pcspkr\x00', 0x7)
r2 = openat$dsp1(0xffffffffffffff9c, &(0x7f0000000200), 0x20080, 0x0)
ioctl$SNDCTL_DSP_CHANNELS(r2, 0xc0045006, &(0x7f0000000240)=0x2)
ioctl$SNDCTL_DSP_SPEED(r2, 0xc0045002, &(0x7f0000000280)=0xac44)
write$dsp(r2, &(0x7f0000002200)='\x00\x00\x00\x00', 0x4)
r3 = openat$adsp1(0xffffffffffffff9c, &(0x7f0000000300), 0x200, 0x0)
ppoll(&(0x7f0000000340)=[{r3, 0x8108}], 0x1, 0x0, 0x0, 0x0)
r4 = openat$audio1(0xffffffffffffff9c, &(0x7f0000000380), 0x0, 0x0)
read$dsp(r4, &(0x7f0000001400), 0x1000)
[ 78.196781][ T5320] ------------[ cut here ]------------
[ 78.204758][ T5320] UBSAN: array-index-out-of-bounds in sound/drivers/dummy.c:1020:40
[ 78.211669][ T5320] index -1 is out of range for type 'int[8]'
[ 78.217748][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 78.217766][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 78.217774][ T5320] Call Trace:
[ 78.217779][ T5320]
[ 78.217785][ T5320] dump_stack_lvl+0xe8/0x150
[ 78.217847][ T5320] ubsan_epilogue+0xa/0x30
[ 78.217859][ T5320] __ubsan_handle_out_of_bounds+0xe8/0xf0
[ 78.217900][ T5320] ? __pfx_of_clk_set_defaults+0x10/0x10
[ 78.217915][ T5320] snd_dummy_probe+0x12be/0x18e0
[ 78.217959][ T5320] ? __pfx_snd_dummy_probe+0x10/0x10
[ 78.217968][ T5320] ? kernfs_put+0x7b9/0x820
[ 78.217981][ T5320] ? is_acpi_device_node+0x26/0x70
[ 78.217992][ T5320] ? acpi_dev_pm_attach+0xe9/0x240
[ 78.218004][ T5320] ? dev_pm_domain_attach+0xbd/0xf0
[ 78.218019][ T5320] ? __pfx_snd_dummy_probe+0x10/0x10
[ 78.218027][ T5320] platform_probe+0xf9/0x190
[ 78.218036][ T5320] ? __pfx_platform_probe+0x10/0x10
[ 78.218042][ T5320] really_probe+0x254/0xae0
[ 78.218055][ T5320] __driver_probe_device+0x1e8/0x360
[ 78.218066][ T5320] device_driver_attach+0xe0/0x1d0
[ 78.218076][ T5320] bind_store+0x1d0/0x220
[ 78.218087][ T5320] ? __pfx_sysfs_kf_write+0x10/0x10
[ 78.218095][ T5320] kernfs_fop_write_iter+0x3a4/0x540
[ 78.218104][ T5320] vfs_write+0x612/0xba0
[ 78.218119][ T5320] ? __pfx_vfs_write+0x10/0x10
[ 78.218133][ T5320] ? __fget_files+0x2a/0x420
[ 78.218146][ T5320] ksys_write+0x150/0x270
[ 78.218157][ T5320] ? __pfx_ksys_write+0x10/0x10
[ 78.218171][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 78.218180][ T5320] do_syscall_64+0x174/0x580
[ 78.218194][ T5320] ? trace_irq_disable+0x3b/0x140
[ 78.218211][ T5320] ? clear_bhb_loop+0x40/0x90
[ 78.218225][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 78.218237][ T5320] RIP: 0033:0x7fe0c3b9e019
[ 78.218249][ T5320] 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
[ 78.218258][ T5320] RSP: 002b:00007fe0c4a31fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 78.218272][ T5320] RAX: ffffffffffffffda RBX: 00007fe0c3e25fa0 RCX: 00007fe0c3b9e019
[ 78.218279][ T5320] RDX: 0000000000000007 RSI: 0000200000000180 RDI: 0000000000000004
[ 78.218283][ T5320] RBP: 00007fe0c3c3500c R08: 0000000000000000 R09: 0000000000000000
[ 78.218287][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 78.218291][ T5320] R13: 00007fe0c3e26038 R14: 00007fe0c3e25fa0 R15: 00007ffe66ea1758
[ 78.218303][ T5320]
[ 78.218306][ T5320] ---[ end trace ]---
[ 78.399698][ T5285] Bluetooth: hci0: command tx timeout
[ 78.421958][ T5320] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[ 78.425349][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 78.429151][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 78.433866][ T5320] Call Trace:
[ 78.435304][ T5320]
[ 78.436526][ T5320] vpanic+0x56c/0xa60
[ 78.438196][ T5320] ? __pfx_vpanic+0x10/0x10
[ 78.440074][ T5320] panic+0xc5/0xd0
[ 78.441664][ T5320] ? __pfx_panic+0x10/0x10
[ 78.443514][ T5320] ? __pfx__printk+0x10/0x10
[ 78.445508][ T5320] ? dump_stack_lvl+0x103/0x150
[ 78.447574][ T5320] check_panic_on_warn+0x89/0xb0
[ 78.449592][ T5320] __ubsan_handle_out_of_bounds+0xe8/0xf0
[ 78.451987][ T5320] ? __pfx_of_clk_set_defaults+0x10/0x10
[ 78.454258][ T5320] snd_dummy_probe+0x12be/0x18e0
[ 78.456322][ T5320] ? __pfx_snd_dummy_probe+0x10/0x10
[ 78.458499][ T5320] ? kernfs_put+0x7b9/0x820
[ 78.460445][ T5320] ? is_acpi_device_node+0x26/0x70
[ 78.462590][ T5320] ? acpi_dev_pm_attach+0xe9/0x240
[ 78.464735][ T5320] ? dev_pm_domain_attach+0xbd/0xf0
[ 78.466861][ T5320] ? __pfx_snd_dummy_probe+0x10/0x10
[ 78.469070][ T5320] platform_probe+0xf9/0x190
[ 78.470956][ T5320] ? __pfx_platform_probe+0x10/0x10
[ 78.473098][ T5320] really_probe+0x254/0xae0
[ 78.474988][ T5320] __driver_probe_device+0x1e8/0x360
[ 78.477072][ T5320] device_driver_attach+0xe0/0x1d0
[ 78.479043][ T5320] bind_store+0x1d0/0x220
[ 78.480511][ T5320] ? __pfx_sysfs_kf_write+0x10/0x10
[ 78.482386][ T5320] kernfs_fop_write_iter+0x3a4/0x540
[ 78.484173][ T5320] vfs_write+0x612/0xba0
[ 78.485639][ T5320] ? __pfx_vfs_write+0x10/0x10
[ 78.487233][ T5320] ? __fget_files+0x2a/0x420
[ 78.488815][ T5320] ksys_write+0x150/0x270
[ 78.490290][ T5320] ? __pfx_ksys_write+0x10/0x10
[ 78.491951][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 78.493962][ T5320] do_syscall_64+0x174/0x580
[ 78.495612][ T5320] ? trace_irq_disable+0x3b/0x140
[ 78.497415][ T5320] ? clear_bhb_loop+0x40/0x90
[ 78.499171][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 78.501373][ T5320] RIP: 0033:0x7fe0c3b9e019
[ 78.503043][ T5320] 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
[ 78.510092][ T5320] RSP: 002b:00007fe0c4a31fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 78.513304][ T5320] RAX: ffffffffffffffda RBX: 00007fe0c3e25fa0 RCX: 00007fe0c3b9e019
[ 78.516458][ T5320] RDX: 0000000000000007 RSI: 0000200000000180 RDI: 0000000000000004
[ 78.519527][ T5320] RBP: 00007fe0c3c3500c R08: 0000000000000000 R09: 0000000000000000
[ 78.522675][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 78.525704][ T5320] R13: 00007fe0c3e26038 R14: 00007fe0c3e25fa0 R15: 00007ffe66ea1758
[ 78.528674][ T5320]
[ 78.530365][ T5320] Kernel Offset: disabled
[ 78.532112][ T5320] Rebooting in 86400 seconds..