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: 0 PID: 4873 at block/genhd.c:543 device_add_disk+0x5d8/0xacc
Modules linked in:
CPU: 0 PID: 4873 Comm: syz.0.16 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 : ffff80001fab7b10
x29: ffff80001fab7b70 x28: dfff800000000000 x27: ffff0000c04b4680
x26: ffff0000c04b4b7c x25: 00000000ffffffea x24: ffff0000d38868a0
x23: 1fffe0001a710d14 x22: 0000000000000001 x21: ffff0000d3886890
x20: 0000000000000007 x19: ffff0000d3886800 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000082ec934 x15: ffff8000089c9160
x14: ffff80000c0f7a10 x13: ffff80000c0f84a4 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000d1a51b40
x8 : ffff80000a8dec44 x7 : 0000000000000000 x6 : ffff80000805d4a8
x5 : ffff0000c8942960 x4 : 0000000000000000 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: 540
hardirqs last  enabled at (539): [<ffff8000088d68d0>] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (540): [<ffff800011b4a1ac>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (522): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (522): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (409): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (409): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (409): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (409): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace d13ee2773fbc1f51 ]---