4dd1ec91d69013dd5f48e6bd49a9add5458f3656

ubi: mtd0 is already attached to ubi0
ubi7: attaching mtd147
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20023 Comm: syz-executor.0 Not tainted 6.2.0 #6
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:mtd_div_by_eb include/linux/mtd/mtd.h:580 [inline]
RIP: 0010:io_init drivers/mtd/ubi/build.c:620 [inline]
RIP: 0010:ubi_attach_mtd_dev+0x77f/0x2fe0 drivers/mtd/ubi/build.c:955
Code: fc ff df 48 c1 ea 03 0f b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1f 25 00 00 41 8b 4c 24 10 48 89 d8 31 d2 <48> f7 f1 48 89 c3 e8 b6 f3 1b fc 48 8d 85 40 17 00 00 48 89 c2 48
RSP: 0018:ffffc9000be0fd30 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888047a49d40 RDI: 0000000000000002
RBP: ffff888024e1c000 R08: 0000000000000016 R09: fffff520017c1f47
R10: ffffc9000be0fa37 R11: fffff520017c1f46 R12: ffff88806545a000
R13: 0000000000000000 R14: ffff88806545a010 R15: 0000000000000007
FS:  00007fd45e85c700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64aeef53a4 CR3: 000000004f39a000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ctrl_cdev_ioctl+0x303/0x3a0 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x198/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd45d6902fd
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd45e85bc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd45d7bbf60 RCX: 00007fd45d6902fd
RDX: 0000000020000000 RSI: 0000000040186f40 RDI: 0000000000000005
RBP: 00007fd45d6fec89 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff676814bf R14: 00007fff67681670 R15: 00007fd45e85bdc0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mtd_div_by_eb include/linux/mtd/mtd.h:580 [inline]
RIP: 0010:io_init drivers/mtd/ubi/build.c:620 [inline]
RIP: 0010:ubi_attach_mtd_dev+0x77f/0x2fe0 drivers/mtd/ubi/build.c:955
Code: fc ff df 48 c1 ea 03 0f b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1f 25 00 00 41 8b 4c 24 10 48 89 d8 31 d2 <48> f7 f1 48 89 c3 e8 b6 f3 1b fc 48 8d 85 40 17 00 00 48 89 c2 48
RSP: 0018:ffffc9000be0fd30 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888047a49d40 RDI: 0000000000000002
RBP: ffff888024e1c000 R08: 0000000000000016 R09: fffff520017c1f47
R10: ffffc9000be0fa37 R11: fffff520017c1f46 R12: ffff88806545a000
R13: 0000000000000000 R14: ffff88806545a010 R15: 0000000000000007
FS:  00007fd45e85c700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2428f14028 CR3: 000000004f39a000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   8:	4c 89 f0             	mov    %r14,%rax
   b:	83 e0 07             	and    $0x7,%eax
   e:	83 c0 03             	add    $0x3,%eax
  11:	38 d0                	cmp    %dl,%al
  13:	7c 08                	jl     0x1d
  15:	84 d2                	test   %dl,%dl
  17:	0f 85 1f 25 00 00    	jne    0x253c
  1d:	41 8b 4c 24 10       	mov    0x10(%r12),%ecx
  22:	48 89 d8             	mov    %rbx,%rax
  25:	31 d2                	xor    %edx,%edx
* 27:	48 f7 f1             	div    %rcx <-- trapping instruction
  2a:	48 89 c3             	mov    %rax,%rbx
  2d:	e8 b6 f3 1b fc       	callq  0xfc1bf3e8
  32:	48 8d 85 40 17 00 00 	lea    0x1740(%rbp),%rax
  39:	48 89 c2             	mov    %rax,%rdx
  3c:	48                   	rex.W