INFO: task syz-executor.1:28895 can't die for more than 143 seconds.
task:syz-executor.1  state:R  running task     stack:26544 pid:28895 ppid: 25995 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4984 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6265
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6431
 __cond_resched+0x13/0x20 kernel/sched/core.c:8144
 _cond_resched include/linux/sched.h:2025 [inline]
 vunmap_pmd_range mm/vmalloc.c:359 [inline]
 vunmap_pud_range mm/vmalloc.c:382 [inline]
 vunmap_p4d_range mm/vmalloc.c:405 [inline]
 vunmap_range_noflush+0x4ec/0x6d0 mm/vmalloc.c:436
 free_unmap_vmap_area mm/vmalloc.c:1778 [inline]
 remove_vm_area+0x1c2/0x230 mm/vmalloc.c:2528
 vm_remove_mappings mm/vmalloc.c:2557 [inline]
 __vunmap+0x392/0xb70 mm/vmalloc.c:2622
 __vfree+0x3c/0xd0 mm/vmalloc.c:2680
 __vmalloc_area_node mm/vmalloc.c:2981 [inline]
 __vmalloc_node_range+0x8b5/0xab0 mm/vmalloc.c:3065
 __vmalloc_node mm/vmalloc.c:3114 [inline]
 __vmalloc+0x69/0x80 mm/vmalloc.c:3128
 __snd_dma_alloc_pages+0xc1/0x130 sound/core/memalloc.c:39
 snd_dma_alloc_dir_pages+0x14d/0x240 sound/core/memalloc.c:73
 do_alloc_pages+0xc2/0x180 sound/core/pcm_memory.c:48
 snd_pcm_lib_malloc_pages+0x3e2/0x990 sound/core/pcm_memory.c:424
 snd_pcm_hw_params+0x1408/0x1990 sound/core/pcm_native.c:719
 snd_pcm_kernel_ioctl+0x164/0x310 sound/core/pcm_native.c:3372
 snd_pcm_oss_change_params_locked+0x1936/0x3a60 sound/core/oss/pcm_oss.c:947
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1091 [inline]
 snd_pcm_oss_make_ready+0xe7/0x1b0 sound/core/oss/pcm_oss.c:1150
 snd_pcm_oss_sync+0x1de/0x800 sound/core/oss/pcm_oss.c:1717
 snd_pcm_oss_release+0x276/0x300 sound/core/oss/pcm_oss.c:2571
 __fput+0x286/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8d2d52572b
RSP: 002b:00007ffd983b7250 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f8d2d52572b
RDX: 00007f8d2d68b478 RSI: ffffffff894f9711 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2c525148
R10: 0000000000000e4e R11: 0000000000000293 R12: 000000000031f38e
R13: 00000000000003e8 R14: 00007f8d2d685f60 R15: 000000000031ed9e
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kworker/u4:4/1019:
1 lock held by in:imklog/6235:
2 locks held by systemd-udevd/7958:
1 lock held by syz-executor.1/28895:
2 locks held by vivid-002-sdr-c/28922:

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