el0_svc+0x20/0x80 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: 0 PID: 27379 at block/genhd.c:538 device_add_disk+0x1bc/0x3ac block/genhd.c:532
Modules linked in:
CPU: 0 PID: 27379 Comm: syz-executor.1 Not tainted 5.15.0-rc6-syzkaller-00209-g9c0c4d24ac00 #0
Hardware name: linux,dummy-virt (DT)
pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : device_add_disk+0x1bc/0x3ac block/genhd.c:538
lr : device_add_disk+0xb0/0x3ac block/genhd.c:534
sp : ffff8000196e3d00
x29: ffff8000196e3d00 x28: fbff000005d7eac0 x27: 0000000000000000
x26: 0000000000000000 x25: fcff0000072439a0 x24: f6ff000002e4bec0
x23: f6ff000002e4be80 x22: 0000000000000000 x21: 0000000000000000
x20: 00000000ffffffea x19: f4ff00000736d800 x18: 00000000fffffffa
x17: 79732d3663722d30 x16: 2e35312e35206465 x15: ffff8000102d526c
x14: ffff8000108817ec x13: ffff80001177f124 x12: ffff80001177ec50
x11: ffff8000100115f4 x10: ffff80001177f124 x9 : ffff80001177ec50
x8 : ffff8000100249a0 x7 : ffff800010024888 x6 : 0000000000200c10
x5 : f9ff00002d580000 x4 : 0000000000000000 x3 : 0000000000200c18
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000007
Call trace:
 device_add_disk+0x1bc/0x3ac block/genhd.c:532
 add_disk include/linux/genhd.h:222 [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+0x20/0x80 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 0791a682f023f54f ]---