el0_svc_common.constprop.0+0x44/0xcc arch/arm64/kernel/syscall.c:145
 do_el0_svc+0x70/0x90 arch/arm64/kernel/syscall.c:184
 el0_svc+0x2c/0x54 arch/arm64/kernel/entry-common.c:408
 el0_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:424
 el0_sync+0x1b4/0x1c0 arch/arm64/kernel/entry.S:734
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11097 at block/genhd.c:549 __device_add_disk+0x41c/0x460 block/genhd.c:561
Modules linked in:
CPU: 0 PID: 11097 Comm: syz-executor.1 Not tainted 5.13.0-rc3-syzkaller-00043-gad9f25d33860 #0
Hardware name: linux,dummy-virt (DT)
pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)
pc : __device_add_disk+0x41c/0x460 block/genhd.c:549
lr : __device_add_disk+0x3e4/0x460 block/genhd.c:548
sp : ffff800015fb3cc0
x29: ffff800015fb3cc0 x28: fdff000020c00000 x27: 0000000000000000
x26: ffff800012aa2000 x25: f1ff00002160b800 x24: fcff00000472400c
x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000
x20: f1ff000003449320 x19: fcff000004724000 x18: 00000000fffffffa
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000020
x14: ffffffffffffffff x13: 00000000000012e7 x12: ffff800015fb3650
x11: ffff80001282c6c8 x10: 00000000ffffe000 x9 : ffff80001282c6c8
x8 : ffff80001277c6c8 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000030 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : fdff000020c00000 x0 : fffffffffffffff4
Call trace:
 __device_add_disk+0x41c/0x460 block/genhd.c:561
 device_add_disk+0x14/0x20 block/genhd.c:571
 add_disk include/linux/genhd.h:212 [inline]
 loop_add+0x1f4/0x25c drivers/block/loop.c:2173
 loop_control_ioctl drivers/block/loop.c:2269 [inline]
 loop_control_ioctl+0xc4/0x1b0 drivers/block/loop.c:2251
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __arm64_sys_ioctl+0xa8/0xec fs/ioctl.c:1055
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0x44/0xcc arch/arm64/kernel/syscall.c:145
 do_el0_svc+0x70/0x90 arch/arm64/kernel/syscall.c:184
 el0_svc+0x2c/0x54 arch/arm64/kernel/entry-common.c:408
 el0_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:424
 el0_sync+0x1b4/0x1c0 arch/arm64/kernel/entry.S:734
---[ end trace ef2114b8d119c9a6 ]---