r10:00000036 r9:833e8000 r8:8020029c r7:00000036 r6:0012ed04 r5:00000000
 r4:00000000
kobject: kobject_add_internal failed for mtd4 (error: -12 parent: mtd)
------------[ cut here ]------------
WARNING: drivers/mtd/mtdpart.c:38 at release_mtd_partition+0x4c/0x50 drivers/mtd/mtdpart.c:38, CPU#0: syz.5.1264/10400
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 10400 Comm: syz.5.1264 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a14>] (dump_backtrace) from [<80201b08>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:82a1e6fc r6:00000000 r5:8231bf50 r4:00000001
[<80201af0>] (show_stack) from [<8021e320>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e320>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e2c4>] (dump_stack_lvl) from [<8021e34c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a1e6fc r6:00000000 r5:833e8000 r4:82c7bd3c
[<8021e334>] (dump_stack) from [<8020260c>] (vpanic+0x114/0x320 kernel/panic.c:650)
[<802024f8>] (vpanic) from [<8020284c>] (trace_suspend_resume+0x0/0x104 kernel/panic.c:787)
 r7:80d1f160
[<80202818>] (panic) from [<802506a8>] (check_panic_on_warn kernel/panic.c:524 [inline])
[<80202818>] (panic) from [<802506a8>] (get_taint+0x0/0x1c kernel/panic.c:519)
 r3:82a0b544 r2:00000001 r1:82302a38 r0:8230a318
[<80250630>] (check_panic_on_warn) from [<80250824>] (__warn+0x98/0x1ac kernel/panic.c:1103)
[<8025078c>] (__warn) from [<80250ab0>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1130)
 r8:00000009 r7:823d79a4 r6:ed745bbc r5:833e8000 r4:00000000
[<8025093c>] (warn_slowpath_fmt) from [<80d1f160>] (release_mtd_partition+0x4c/0x50 drivers/mtd/mtdpart.c:38)
 r10:00000000 r9:fffffff4 r8:860b44f8 r7:00000000 r6:86acb340 r5:860b4400
 r4:860b4400
[<80d1f114>] (release_mtd_partition) from [<80d1970c>] (mtd_release+0x40/0x54 drivers/mtd/mtdcore.c:102)
 r5:860b4400 r4:05a00008
[<80d196cc>] (mtd_release) from [<80ba5d8c>] (device_release+0x40/0xb0 drivers/base/core.c:2566)
 r5:00000000 r4:860b44f8
[<80ba5d4c>] (device_release) from [<81ada978>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80ba5d4c>] (device_release) from [<81ada978>] (kobject_release lib/kobject.c:720 [inline])
[<80ba5d4c>] (device_release) from [<81ada978>] (kref_put include/linux/kref.h:65 [inline])
[<80ba5d4c>] (device_release) from [<81ada978>] (kobject_put+0xa0/0x258 lib/kobject.c:737)
 r5:81d55b2c r4:860b44f8
[<81ada8d8>] (kobject_put) from [<80ba5fd0>] (put_device+0x18/0x1c drivers/base/core.c:3814)
 r8:860b44f8 r7:05a00008 r6:fffffff4 r5:00000004 r4:860b4400
[<80ba5fb8>] (put_device) from [<80d1c744>] (add_mtd_device+0x66c/0x7f0 drivers/mtd/mtdcore.c:803)
[<80d1c0d8>] (add_mtd_device) from [<80d1f050>] (mtd_add_partition+0x140/0x204 drivers/mtd/mtdpart.c:280)
 r10:0000000e r9:844d2708 r8:860b4710 r7:8606cf10 r6:860b4400 r5:844d2400
 r4:844d2730
[<80d1ef10>] (mtd_add_partition) from [<80d2250c>] (mtdchar_blkpg_ioctl drivers/mtd/mtdchar.c:562 [inline])
[<80d1ef10>] (mtd_add_partition) from [<80d2250c>] (mtdchar_ioctl+0x125c/0x1474 drivers/mtd/mtdchar.c:1218)
 r10:833e8000 r9:85f48400 r8:86b1c480 r7:844d2400 r6:200002c0 r5:00000000
 r4:0000000e
[<80d212b0>] (mtdchar_ioctl) from [<80d22770>] (mtdchar_unlocked_ioctl+0x4c/0x64 drivers/mtd/mtdchar.c:1241)
 r10:833e8000 r9:00000004 r8:86b1c480 r7:200002c0 r6:00001269 r5:86b1c480
 r4:844d2740
[<80d22724>] (mtdchar_unlocked_ioctl) from [<8059c26c>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80d22724>] (mtdchar_unlocked_ioctl) from [<8059c26c>] (do_vfs_ioctl fs/ioctl.c:551 [inline])
[<80d22724>] (mtdchar_unlocked_ioctl) from [<8059c26c>] (__do_sys_ioctl fs/ioctl.c:595 [inline])
[<80d22724>] (mtdchar_unlocked_ioctl) from [<8059c26c>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583)
 r7:200002c0 r6:00001269 r5:86b1c481 r4:00000000
[<8059c028>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xed745fa8 to 0xed745ff0)
5fa0:                   00000000 00000000 00000004 00001269 200002c0 00000000
5fc0: 00000000 00000000 0012ed04 00000036 003462d8 00000000 00000001 76fe40dc
5fe0: 76fe3e88 76fe3e78 00018bc4 00130300
 r10:00000036 r9:833e8000 r8:8020029c r7:00000036 r6:0012ed04 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..