mtd partition "" doesn't have enough space: 0x20003 < 0x20020, disabled
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5344 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x414/0x560 lib/fault-inject.c:174
 should_failslab+0xa8/0x100 mm/failslab.c:46
 slab_pre_alloc_hook mm/slub.c:4906 [inline]
 slab_alloc_node mm/slub.c:5239 [inline]
 __kmalloc_cache_noprof+0x84/0x700 mm/slub.c:5771
 kmalloc_noprof include/linux/slab.h:957 [inline]
 kzalloc_noprof include/linux/slab.h:1094 [inline]
 device_private_init drivers/base/core.c:3534 [inline]
 device_add+0xbe/0xb80 drivers/base/core.c:3585
 add_mtd_device+0xaca/0x1690 drivers/mtd/mtdcore.c:800
 mtd_add_partition+0x30e/0x510 drivers/mtd/mtdpart.c:279
 mtdchar_blkpg_ioctl+0x21d/0x250 drivers/mtd/mtdchar.c:562
 mtdchar_ioctl+0x134e/0x1a50 drivers/mtd/mtdchar.c:1218
 mtdchar_unlocked_ioctl+0xae/0xd0 drivers/mtd/mtdchar.c:1241
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8a178f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe8a269e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe8a19e5fa0 RCX: 00007fe8a178f7c9
RDX: 0000200000000080 RSI: 0000000000001269 RDI: 0000000000000004
RBP: 00007fe8a269e090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fe8a19e6038 R14: 00007fe8a19e5fa0 R15: 00007ffde5a94dc8
 </TASK>
------------[ cut here ]------------
WARNING: drivers/mtd/mtdpart.c:37 at release_mtd_partition+0x78/0x80 drivers/mtd/mtdpart.c:37, CPU#0: syz.0.0/5344
Modules linked in:
CPU: 0 UID: 0 PID: 5344 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:release_mtd_partition+0x78/0x80 drivers/mtd/mtdpart.c:37
Code: e8 03 42 80 3c 38 00 74 05 e8 b4 77 f9 fb 48 8b 7b 38 e8 3b ea ed fb 48 89 df 5b 41 5e 41 5f e9 2e ea ed fb e8 b9 cc 91 fb 90 <0f> 0b 90 eb c8 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e5174b0 EFLAGS: 00010293
RAX: ffffffff862f3867 RBX: ffff888011f55000 RCX: ffff888034b10000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888011f55000
RBP: 0000000000000001 R08: ffff8880320a27af R09: 1ffff110064144f5
R10: dffffc0000000000 R11: ffffed10064144f6 R12: 1ffffffff17d0c7c
R13: dffffc0000000000 R14: ffff888011f55650 R15: dffffc0000000000
FS:  00007fe8a269e6c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8a267cfc8 CR3: 0000000046392000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 mtd_release+0x8f/0xd0 drivers/mtd/mtdcore.c:101
 device_release+0x9e/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x570 lib/kobject.c:737
 add_mtd_device+0xaea/0x1690 drivers/mtd/mtdcore.c:802
 mtd_add_partition+0x30e/0x510 drivers/mtd/mtdpart.c:279
 mtdchar_blkpg_ioctl+0x21d/0x250 drivers/mtd/mtdchar.c:562
 mtdchar_ioctl+0x134e/0x1a50 drivers/mtd/mtdchar.c:1218
 mtdchar_unlocked_ioctl+0xae/0xd0 drivers/mtd/mtdchar.c:1241
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8a178f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe8a269e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe8a19e5fa0 RCX: 00007fe8a178f7c9
RDX: 0000200000000080 RSI: 0000000000001269 RDI: 0000000000000004
RBP: 00007fe8a269e090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fe8a19e6038 R14: 00007fe8a19e5fa0 R15: 00007ffde5a94dc8
 </TASK>