el0_svc_common.constprop.0+0x44/0xec arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x70/0x90 arch/arm64/kernel/syscall.c:181
 el0_svc+0x20/0x74 arch/arm64/kernel/entry-common.c:595
 el0t_64_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:613
 el0t_64_sync+0x1ac/0x1b0 arch/arm64/kernel/entry.S:572
------------[ cut here ]------------
WARNING: CPU: 1 PID: 32631 at block/genhd.c:537 device_add_disk+0x1bc/0x3b0 block/genhd.c:531
Modules linked in:
CPU: 1 PID: 32631 Comm: syz-executor.1 Not tainted 5.15.0-rc1-syzkaller-00033-gff1ffd71d5f0 #0
Hardware name: linux,dummy-virt (DT)
pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : device_add_disk+0x1bc/0x3b0 block/genhd.c:537
lr : device_add_disk+0xb0/0x3b0 block/genhd.c:533
sp : ffff80001a4fbd00
x29: ffff80001a4fbd00 x28: fbff0000070e8f40 x27: 0000000000000000
x26: 0000000000000000 x25: f4ff000007cfd9a0 x24: faff000002d64500
x23: faff000002d644c0 x22: 0000000000000000 x21: 0000000000000000
x20: 00000000ffffffea x19: fbff000003a9f400 x18: 00000000fffffffa
x17: 79732d3163722d30 x16: 2e35312e35206465 x15: ffff8000102d568c
x14: ffff8000108848bc x13: ffff8000117863c4 x12: ffff800011785f10
x11: ffff8000100115f4 x10: ffff8000117863c4 x9 : ffff800011785f10
x8 : ffff8000100249e0 x7 : ffff8000100248c8 x6 : 00000000000f7c89
x5 : 0000000000000000 x4 : ffff00007fbda170 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000007
Call trace:
 device_add_disk+0x1bc/0x3b0 block/genhd.c:531
 add_disk include/linux/genhd.h:221 [inline]
 loop_add+0x23c/0x2a0 drivers/block/loop.c:2397
 loop_control_ioctl+0xac/0x1f0 drivers/block/loop.c:2512
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0xa8/0xec fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0x44/0xec arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x70/0x90 arch/arm64/kernel/syscall.c:181
 el0_svc+0x20/0x74 arch/arm64/kernel/entry-common.c:595
 el0t_64_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:613
 el0t_64_sync+0x1ac/0x1b0 arch/arm64/kernel/entry.S:572
---[ end trace 12dc8c9373aafee8 ]---