exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x73a/0x2360 kernel/exit.c:1004 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147 get_signal+0x121b/0x12c0 kernel/signal.c:3038 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x2ba/0x8f0 kernel/entry/common.c:165 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0033:0x7f8791c541ce Code: Unable to access opcode bytes at 0x7f8791c541a4. RSP: 002b:00007f8792c15430 EFLAGS: 00000212 RAX: 00000000000951e0 RBX: 00007f8792c154f0 RCX: 0000000000000026 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f8792c15590 RBP: 0000000000000102 R08: 00007f8785c00000 R09: 00000000000951df R10: 0000000000000000 R11: 00007f8792c15500 R12: 0000000000000001 R13: 00007f8791e52aa0 R14: 0000000000000000 R15: 00007f8792c15590 Mem-Info: active_anon:1407 inactive_anon:16 isolated_anon:0 active_file:0 inactive_file:38782 isolated_file:0 unevictable:1768 dirty:0 writeback:0 slab_reclaimable:7110 slab_unreclaimable:30753 mapped:1070 shmem:2167 pagetables:308 sec_pagetables:292 bounce:0 kernel_misc_reclaimable:0 free:55935 free_pcp:287 free_cma:0 Node 0 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:16kB dirty:0kB writeback:0kB shmem:0kB shmem_thp:0kB shmem_pmdmapped:0kB anon_thp:0kB kernel_stack:2624kB pagetables:468kB sec_pagetables:1088kB all_unreclaimable? yes Balloon:0kB gpu_active:0kB gpu_reclaim:0kB Node 0 DMA free:1208kB boost:0kB min:760kB low:948kB high:1136kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 112 112 112 112 Node 0 DMA32 free:4112kB boost:0kB min:4296kB low:5368kB high:6440kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:770052kB managed:115240kB mlocked:0kB bounce:0kB free_pcp:1148kB local_pcp:1148kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 0*4kB 1*8kB (U) 1*16kB (U) 7*32kB (U) 1*64kB (U) 1*128kB (U) 1*256kB (U) 1*512kB (U) 0*1024kB 0*2048kB 0*4096kB = 1208kB Node 0 DMA32: 6*4kB (UME) 9*8kB (UME) 5*16kB (ME) 15*32kB (UME) 8*64kB (UME) 5*128kB (UM) 3*256kB (UM) 1*512kB (M) 1*1024kB (M) 0*2048kB 0*4096kB = 4112kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=2 hugepages_free=2 hugepages_surp=0 hugepages_size=2048kB 40983 total pagecache pages 34 pages in swap cache Free swap = 124448kB Total swap = 124996kB 393083 pages RAM 0 pages HighMem/MovableOnly 187730 pages reserved 0 pages cma reserved Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: vpanic+0x56c/0xa60 kernel/panic.c:651 panic+0xc5/0xd0 kernel/panic.c:788 out_of_memory+0x13e5/0x1480 mm/oom_kill.c:1166 __alloc_pages_may_oom+0x1ea/0x330 mm/page_alloc.c:4116 __alloc_pages_slowpath+0x6e8/0xcc0 mm/page_alloc.c:4967 __alloc_frozen_pages_noprof+0x31f/0x380 mm/page_alloc.c:5317 alloc_pages_mpol+0x212/0x380 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0xac/0x2a0 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3742 [inline] __vmalloc_area_node mm/vmalloc.c:3892 [inline] __vmalloc_node_range_noprof+0xe2b/0x1730 mm/vmalloc.c:4082 __vmalloc_node_noprof mm/vmalloc.c:4143 [inline] vmalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4178 __snd_dma_alloc_pages sound/core/memalloc.c:45 [inline] snd_dma_alloc_dir_pages+0x120/0x220 sound/core/memalloc.c:79 do_alloc_pages+0x11c/0x260 sound/core/pcm_memory.c:69 snd_pcm_lib_malloc_pages+0x33a/0x780 sound/core/pcm_memory.c:455 snd_pcm_hw_params+0x870/0x1d50 sound/core/pcm_native.c:828 snd_pcm_oss_change_params_locked+0x1e90/0x3c80 sound/core/oss/pcm_oss.c:967 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1108 [inline] snd_pcm_oss_make_ready sound/core/oss/pcm_oss.c:1167 [inline] snd_pcm_oss_sync+0x43e/0xdf0 sound/core/oss/pcm_oss.c:1739 snd_pcm_oss_release+0xff/0x250 sound/core/oss/pcm_oss.c:2590 __fput+0x418/0xa50 fs/file_table.c:512 task_work_run+0x1d9/0x270 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x73a/0x2360 kernel/exit.c:1004 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147 get_signal+0x121b/0x12c0 kernel/signal.c:3038 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x2ba/0x8f0 kernel/entry/common.c:165 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0033:0x7f8791c541ce Code: Unable to access opcode bytes at 0x7f8791c541a4. RSP: 002b:00007f8792c15430 EFLAGS: 00000212 RAX: 00000000000951e0 RBX: 00007f8792c154f0 RCX: 0000000000000026 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f8792c15590 RBP: 0000000000000102 R08: 00007f8785c00000 R09: 00000000000951df R10: 0000000000000000 R11: 00007f8792c15500 R12: 0000000000000001 R13: 00007f8791e52aa0 R14: 0000000000000000 R15: 00007f8792c15590 Kernel Offset: disabled Rebooting in 86400 seconds.. loop0: detected capacity change from 0 to 8