Not allocated shadow for addr ffff88012e79cd70 (page ffffea000716da80)
Attempted to access 8 bytes
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan.c:1091!
invalid opcode: 0000 [#1] SMP
CPU: 0 PID: 11101 Comm: syz-executor0 Not tainted 4.19.0-rc4+ #64
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_get_shadow_address+0x2d6/0x3d0 mm/kmsan/kmsan.c:1089
Code: e9 89 00 00 00 c7 04 25 20 73 28 8c 01 00 00 00 65 48 8b 04 25 00 fd 02 00 c6 80 7b 09 00 00 01 80 3c 25 38 73 28 8c 00 74 0c <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 c7 c7 1c bc 57 8b 31 c0 4c
RSP: 0018:ffff880138a8f730 EFLAGS: 00010046
RAX: 000000000000001b RBX: 0000000000000000 RCX: d81e0d790a20ea00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: ffff880138a8f760 R08: 0000000000000000 R09: ffff88021fc38f50
R10: 0000000000000000 R11: ffffffff862594e0 R12: 0000000000000001
R13: ffff88012e79cd70 R14: 0000000000000001 R15: 0000000000000008
FS:  000000000240a940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a40021 CR3: 00000001ac328000 CR4: 00000000001406f0
Call Trace:
 kmsan_internal_memset_shadow mm/kmsan/kmsan.c:163 [inline]
 kmsan_internal_unpoison_shadow+0x5c/0xe0 mm/kmsan/kmsan.c:200
 kmsan_unpoison_shadow+0x72/0xd0 mm/kmsan/kmsan.c:214
 native_ptep_get_and_clear arch/x86/include/asm/pgtable_64.h:87 [inline]
 ptep_get_and_clear arch/x86/include/asm/pgtable.h:1104 [inline]
 vunmap_pte_range mm/vmalloc.c:67 [inline]
 vunmap_pmd_range mm/vmalloc.c:84 [inline]
 vunmap_pud_range mm/vmalloc.c:100 [inline]
 vunmap_p4d_range mm/vmalloc.c:116 [inline]
 vunmap_page_range+0x828/0xc20 mm/vmalloc.c:131
 unmap_vmap_area mm/vmalloc.c:604 [inline]
 free_unmap_vmap_area mm/vmalloc.c:739 [inline]
 remove_vm_area+0x39b/0x450 mm/vmalloc.c:1491
 __vunmap+0x34c/0x5d0 mm/vmalloc.c:1519
 vfree+0x79/0x170 mm/vmalloc.c:1594
 snd_pcm_lib_free_vmalloc_buffer+0xba/0x160 sound/core/pcm_memory.c:433
 loopback_hw_free+0x1d2/0x260 sound/drivers/aloop.c:604
 snd_pcm_release_substream+0x243/0x4c0 sound/core/pcm_native.c:2385
 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2388 [inline]
 snd_pcm_oss_release+0x30b/0x4c0 sound/core/oss/pcm_oss.c:2568
 __fput+0x4e8/0xda0 fs/file_table.c:278
 ____fput+0x37/0x40 fs/file_table.c:309
 task_work_run+0x467/0x500 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:166 [inline]
 prepare_exit_to_usermode+0x364/0x470 arch/x86/entry/common.c:197
 syscall_return_slowpath+0x112/0x880 arch/x86/entry/common.c:268
 do_syscall_64+0xe4/0x100 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x411051
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000a3fd90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411051
RDX: 0000001b30320000 RSI: 0000000000730138 RDI: 0000000000000003
RBP: 0000000000000000 R08: ffffffff88493bbf R09: 00000000591bc336
R10: 0000000000a3fcc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000000a6 R15: 0000000000000000
Modules linked in:
---[ end trace 3d271046635110fc ]---
RIP: 0010:kmsan_get_shadow_address+0x2d6/0x3d0 mm/kmsan/kmsan.c:1089
Code: e9 89 00 00 00 c7 04 25 20 73 28 8c 01 00 00 00 65 48 8b 04 25 00 fd 02 00 c6 80 7b 09 00 00 01 80 3c 25 38 73 28 8c 00 74 0c <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 c7 c7 1c bc 57 8b 31 c0 4c
RSP: 0018:ffff880138a8f730 EFLAGS: 00010046
RAX: 000000000000001b RBX: 0000000000000000 RCX: d81e0d790a20ea00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: ffff880138a8f760 R08: 0000000000000000 R09: ffff88021fc38f50
R10: 0000000000000000 R11: ffffffff862594e0 R12: 0000000000000001
R13: ffff88012e79cd70 R14: 0000000000000001 R15: 0000000000000008
FS:  000000000240a940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a40021 CR3: 00000001ac328000 CR4: 00000000001406f0