el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4375 at block/genhd.c:543 device_add_disk+0x5d8/0xacc
Modules linked in:
CPU: 1 PID: 4375 Comm: syz-executor.0 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : device_add_disk+0x5d8/0xacc
lr : device_add_disk+0x5d4/0xacc block/genhd.c:541
sp : ffff800020207b10
x29: ffff800020207b70 x28: dfff800000000000 x27: ffff0000cbe8c680
x26: ffff0000cbe8cb7c x25: 00000000fffffff4 x24: ffff0000ce08bca0
x23: 1fffe00019c11794 x22: 0000000000000001 x21: ffff0000ce08bc90
x20: 0000000000000007 x19: ffff0000ce08bc00 x18: 0000000000000001
x17: 0000000000000000 x16: ffff800011b4eaf8 x15: 00000000ffffffff
x14: ffff0000ce2051c0 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000ce2051c0
x8 : ffff80000a8dec44 x7 : 0000000000000000 x6 : 0000000000000001
x5 : ffff800020206f38 x4 : 0000000000000400 x3 : ffff80000abf9110
x2 : 0000000000000001 x1 : 0000000000000007 x0 : 0000000000000103
Call trace:
 device_add_disk+0x5d8/0xacc
 add_disk include/linux/genhd.h:200 [inline]
 loop_add+0x554/0x7ac drivers/block/loop.c:2430
 loop_control_ioctl+0xec/0x62c drivers/block/loop.c:2545
 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+0x14c/0x1c8 fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 614
hardirqs last  enabled at (613): [<ffff800011b4cfb4>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (613): [<ffff800011b4cfb4>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (614): [<ffff800011b4a1ac>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (608): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (608): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (467): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (467): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (467): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (467): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace f4d97257ee1635fc ]---