md: array md3 already initialised!
------------[ cut here ]------------
1
WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#2: syz.3.565/7254
WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x2114/0x32e0 mm/page_alloc.c:5397, CPU#2: syz.3.565/7254
Modules linked in:
CPU: 2 UID: 0 PID: 7254 Comm: syz.3.565 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
RIP: 0010:alloc_order_allowed mm/page_alloc.c:5340 [inline]
RIP: 0010:__alloc_frozen_pages_noprof+0x2114/0x32e0 mm/page_alloc.c:5397
Code: 13 00 00 39 84 24 98 00 00 00 0f 85 ac f9 ff ff e9 9d f5 ff ff 80 3d 8c e1 bb 0f 00 0f 85 bc e2 ff ff c6 05 7f e1 bb 0f 01 90 <0f> 0b 90 e9 ac e2 ff ff 31 c0 e9 7c eb ff ff 48 8b 3c 24 48 c7 c6
RSP: 0000:ffffc900035e7498 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000000040dc0
RBP: 000000000000000d R08: 0000000000000000 R09: 0000000000000009
R10: 000000000000000d R11: 0000000000000000 R12: 0000000000040dc0
R13: 1ffff920006bceef R14: 0000000000000000 R15: 1ffff920006bcead
FS:  0000000000000000(0000) GS:ffff88809593a000(0063) knlGS:00000000f5436b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c43c953 CR3: 000000004ca50000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486
 ___kmalloc_large_node+0xe8/0x130 mm/slub.c:5353
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5385
 __do_kmalloc_node mm/slub.c:5402 [inline]
 __kmalloc_noprof+0x5a3/0x840 mm/slub.c:5439
 _kmalloc_noprof include/linux/slab.h:995 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 setup_conf+0xc3f/0x2a20 drivers/md/raid5.c:7732
 raid5_run+0x1260/0x1670 drivers/md/raid5.c:8129
 md_run+0xc2f/0x2510 drivers/md/md.c:6779
 do_md_run+0x36/0x660 drivers/md/md.c:6880
 md_ioctl+0x27e6/0x36c0 drivers/md/md.c:8515
 compat_blkdev_ioctl+0x682/0x7b0 block/ioctl.c:854
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x2cf/0x360 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f86fec
Code: Unable to access opcode bytes at 0xf7f86fc2.
RSP: 002b:00000000f543650c EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00000000400c0930
RDX: 0000000080000700 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>