md: could not open device unknown-block(1,4). md: error, md_import_device() returned -16 ------------[ cut here ]------------ 1 WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#2: syz.2.394/6996 WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x2114/0x32e0 mm/page_alloc.c:5397, CPU#2: syz.2.394/6996 Modules linked in: CPU: 2 UID: 0 PID: 6996 Comm: syz.2.394 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 b4 c5 de 0f 00 0f 85 bc e2 ff ff c6 05 a7 c5 de 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:ffffc90003217498 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000034 RDI: 0000000000040dc0 RBP: 0000000000000034 R08: 0000000000000000 R09: 0000000000000009 R10: 0000000000000034 R11: 0000000000000000 R12: 0000000000040dc0 R13: 1ffff92000642eef R14: 0000000000000000 R15: 1ffff92000642ead FS: 0000000000000000(0000) GS:ffff8880954c4000(0063) knlGS:00000000f5416b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7426288 CR3: 0000000052e8f000 CR4: 0000000000352ef0 Call Trace: 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+0x14b/0x8c0 arch/x86/entry/syscall_32.c:282 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:307 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f66fbc Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 58 b8 RSP: 002b:00000000f541650c EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000400c0930 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: d2 74 05 c1 shlb %cl,-0x3f(%rbp,%rax,1) 4: e8 0c 89 02 8b call 0x8b028915 9: 5d pop %rbp a: fc cld b: 31 c0 xor %eax,%eax d: c9 leave e: c3 ret f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 0f 1f 00 nopl (%rax) 21: 51 push %rcx 22: 52 push %rdx 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 ret 2e: 90 nop 2f: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 36: 00 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 3e: 58 pop %rax 3f: b8 .byte 0xb8