last executing test programs:

14.857708ms ago: executing program 0 (id=1):
syz_open_dev$dmmidi(&(0x7f0000000040), 0x0, 0x0)
syz_open_dev$dmmidi(&(0x7f0000000080), 0x0, 0x1)
syz_open_dev$dmmidi(&(0x7f00000000c0), 0x0, 0x2)
syz_open_dev$dmmidi(&(0x7f0000000100), 0x0, 0x800)
syz_open_dev$dmmidi(&(0x7f0000000140), 0x1, 0x0)
syz_open_dev$dmmidi(&(0x7f0000000180), 0x1, 0x1)
syz_open_dev$dmmidi(&(0x7f00000001c0), 0x1, 0x2)
syz_open_dev$dmmidi(&(0x7f0000000200), 0x1, 0x800)
syz_open_dev$dmmidi(&(0x7f0000000240), 0x2, 0x0)
syz_open_dev$dmmidi(&(0x7f0000000280), 0x2, 0x1)
syz_open_dev$dmmidi(&(0x7f00000002c0), 0x2, 0x2)
syz_open_dev$dmmidi(&(0x7f0000000300), 0x2, 0x800)
syz_open_dev$dmmidi(&(0x7f0000000340), 0x3, 0x0)
syz_open_dev$dmmidi(&(0x7f0000000380), 0x3, 0x1)
syz_open_dev$dmmidi(&(0x7f00000003c0), 0x3, 0x2)
syz_open_dev$dmmidi(&(0x7f0000000400), 0x3, 0x800)
syz_open_dev$dmmidi(&(0x7f0000000440), 0x4, 0x0)
syz_open_dev$dmmidi(&(0x7f0000000480), 0x4, 0x1)
syz_open_dev$dmmidi(&(0x7f00000004c0), 0x4, 0x2)
syz_open_dev$dmmidi(&(0x7f0000000500), 0x4, 0x800)

2.418539ms ago: executing program 1 (id=2):
socket$inet(0x2, 0x1, 0x0)

1.88231ms ago: executing program 3 (id=4):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/cdrom1', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/cdrom1', 0x1, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/cdrom1', 0x2, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/cdrom1', 0x800, 0x0)

0s ago: executing program 2 (id=3):
syz_open_dev$MSR(&(0x7f0000000040), 0x0, 0x0)
syz_open_dev$MSR(&(0x7f0000000080), 0x0, 0x1)
syz_open_dev$MSR(&(0x7f00000000c0), 0x0, 0x2)
syz_open_dev$MSR(&(0x7f0000000100), 0x0, 0x800)
syz_open_dev$MSR(&(0x7f0000000140), 0x1, 0x0)
syz_open_dev$MSR(&(0x7f0000000180), 0x1, 0x1)
syz_open_dev$MSR(&(0x7f00000001c0), 0x1, 0x2)
syz_open_dev$MSR(&(0x7f0000000200), 0x1, 0x800)
syz_open_dev$MSR(&(0x7f0000000240), 0x2, 0x0)
syz_open_dev$MSR(&(0x7f0000000280), 0x2, 0x1)
syz_open_dev$MSR(&(0x7f00000002c0), 0x2, 0x2)
syz_open_dev$MSR(&(0x7f0000000300), 0x2, 0x800)
syz_open_dev$MSR(&(0x7f0000000340), 0x3, 0x0)
syz_open_dev$MSR(&(0x7f0000000380), 0x3, 0x1)
syz_open_dev$MSR(&(0x7f00000003c0), 0x3, 0x2)
syz_open_dev$MSR(&(0x7f0000000400), 0x3, 0x800)
syz_open_dev$MSR(&(0x7f0000000440), 0x4, 0x0)
syz_open_dev$MSR(&(0x7f0000000480), 0x4, 0x1)
syz_open_dev$MSR(&(0x7f00000004c0), 0x4, 0x2)
syz_open_dev$MSR(&(0x7f0000000500), 0x4, 0x800)

0s ago: executing program 4 (id=9):
io_destroy(0x0)

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.1.8' (ED25519) to the list of known hosts.
[   31.810849][ T4033] cgroup: Unknown subsys name 'net'
[   32.076653][ T4033] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   32.379191][ T4033] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k SSFS
[   33.114977][ T4056] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
[   33.116270][ T4056] Modules linked in:
[   33.116918][ T4056] CPU: 0 PID: 4056 Comm: syz.4.9 Not tainted 5.15.189-syzkaller #0
[   33.118136][ T4056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
[   33.119691][ T4056] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
[   33.120855][ T4056] pc : lookup_ioctx+0x108/0x7d0
[   33.121580][ T4056] lr : lookup_ioctx+0xe4/0x7d0
[   33.122325][ T4056] sp : ffff80001f767c40
[   33.122964][ T4056] x29: ffff80001f767c40 x28: ffff0000d4451b40 x27: 0000000000000000
[   33.124147][ T4056] x26: 1fffe0001a88a368 x25: 1ffff00003eecfd6 x24: ffff0000da161cc0
[   33.125437][ T4056] x23: dfff800000000000 x22: 00000000fffffff2 x21: 0000000000000000
[   33.126705][ T4056] x20: ffff0000d4451b40 x19: 0000000000000000 x18: 0000000000000000
[   33.127916][ T4056] x17: 0000000000000000 x16: ffff800008a19714 x15: 0000000000000000
[   33.129147][ T4056] x14: 0000000000000000 x13: 1ffff0000282e06b x12: 0000000000ff0100
[   33.130322][ T4056] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000ffffffffffff
[   33.131499][ T4056] x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
[   33.132797][ T4056] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
[   33.134129][ T4056] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
[   33.135536][ T4056] Call trace:
[   33.136105][ T4056]  lookup_ioctx+0x108/0x7d0
[   33.136852][ T4056]  __arm64_sys_io_destroy+0x90/0x1b8
[   33.137741][ T4056]  invoke_syscall+0x98/0x2b8
[   33.138482][ T4056]  el0_svc_common+0x138/0x258
[   33.139280][ T4056]  do_el0_svc+0x58/0x14c
[   33.139975][ T4056]  el0_svc+0x78/0x1e0
[   33.140672][ T4056]  el0t_64_sync_handler+0xcc/0xe4
[   33.141512][ T4056]  el0t_64_sync+0x1a0/0x1a4
[   33.142244][ T4056] Code: d503229f 2a1f03f6 2a1f03e0 b8400953 (2a1603e1) 
[   33.143468][ T4056] ---[ end trace 57361a0579f30e46 ]---
[   33.316310][ T4056] Kernel panic - not syncing: Oops - BTI: Fatal exception
[   33.317356][ T4056] SMP: stopping secondary CPUs
[   33.318126][ T4056] Kernel Offset: disabled
[   33.318774][ T4056] CPU features: 0x8,000003c1,7d33ffd9
[   33.319625][ T4056] Memory Limit: none
[   33.484329][ T4056] Rebooting in 86400 seconds..