WARNING: CPU: 1 PID: 26057 at mm/mempolicy.c:1745 policy_node mm/mempolicy.c:1745 [inline]
WARNING: CPU: 1 PID: 26057 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 mm/mempolicy.c:2043
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 26057 Comm: syz-executor5 Not tainted 4.20.0-rc5-next-20181207+ #163
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x632 kernel/panic.c:214
 __warn.cold.8+0x20/0x4f kernel/panic.c:571
kobject: 'loop1' (000000001ac7e98b): kobject_uevent_env
kobject: 'loop1' (000000001ac7e98b): fill_kobj_path: path = '/devices/virtual/block/loop1'
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:policy_node mm/mempolicy.c:1745 [inline]
RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 mm/mempolicy.c:2043
Code: 5f 5d c3 e8 b5 94 be ff 45 89 ec 31 ff 41 81 e4 00 00 04 00 44 89 e6 e8 b1 95 be ff 45 85 e4 0f 84 50 ff ff ff e8 93 94 be ff <0f> 0b e9 44 ff ff ff e8 87 94 be ff e8 22 5e ff ff 48 89 c3 e9 6b
RSP: 0018:ffff8881b4bd6ec0 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff8881da96f230 RCX: ffffc9000fe5a000
RDX: 0000000000004464 RSI: ffffffff81c1631d RDI: 0000000000000005
RBP: ffff8881b4bd6f00 R08: ffff888186050400 R09: ffffed103b5a5b5f
R10: 0000000000000003 R11: ffff8881dad2dafb R12: 0000000000040000
R13: 00000000000742ca R14: ffff8881da96f238 R15: 0000000000000002
 do_huge_pmd_anonymous_page+0x59e/0x1f50 mm/huge_memory.c:728
 create_huge_pmd mm/memory.c:3673 [inline]
 __handle_mm_fault+0x3c67/0x5b70 mm/memory.c:3877
 handle_mm_fault+0x54f/0xc70 mm/memory.c:3943
 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline]
 __do_page_fault+0x5f6/0xd70 arch/x86/mm/fault.c:1541
 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1572
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:66
Code: 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffff8881b4bd78f0 EFLAGS: 00010202
RAX: ffffed1037db08e4 RBX: 0000000000000020 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffff8881bed84700 RDI: 00000000204d2000
RBP: ffff8881b4bd7928 R08: ffffffffffffffff R09: ffffed1037db08e0
R10: ffffed1037db08e3 R11: ffff8881bed8471f R12: 00000000204d2020
R13: 00000000204d2000 R14: ffff8881bed84700 R15: 00007ffffffff000
 copy_to_user include/linux/uaccess.h:155 [inline]
 snd_pcm_oss_read2+0x2d9/0x450 sound/core/oss/pcm_oss.c:1478
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1531 [inline]
 snd_pcm_oss_read+0x638/0x830 sound/core/oss/pcm_oss.c:2752
 do_loop_readv_writev fs/read_write.c:700 [inline]
 do_iter_read+0x4bc/0x670 fs/read_write.c:924
 vfs_readv+0x175/0x1c0 fs/read_write.c:986
 do_readv+0x11a/0x310 fs/read_write.c:1019
 __do_sys_readv fs/read_write.c:1106 [inline]
 __se_sys_readv fs/read_write.c:1103 [inline]
 __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457659
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f099df3dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457659
RDX: 0000000000000001 RSI: 0000000020395000 RDI: 0000000000000006
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f099df3e6d4
R13: 00000000004c38f6 R14: 00000000004d5de8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..