el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/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: 4872 at block/genhd.c:547 device_add_disk+0x5d8/0xad0 block/genhd.c:-1
Modules linked in:
CPU: 1 PID: 4872 Comm: syz.0.19 Not tainted 5.15.183-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : device_add_disk+0x5d8/0xad0 block/genhd.c:-1
lr : device_add_disk+0x5d4/0xad0 block/genhd.c:545
sp : ffff80001f627b60
x29: ffff80001f627bc0 x28: dfff800000000000 x27: ffff0000ccad1780
x26: ffff0000ccad1c7c x25: 00000000ffffffea x24: ffff0000d1bba8a0
x23: 1fffe0001a377514 x22: 0000000000000001 x21: ffff0000d1bba890
x20: 0000000000000007 x19: ffff0000d1bba800 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000082bf2b8 x15: ffff8000089307b8
x14: ffff80000bcd62b8 x13: ffff80000bcd6b70 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a60e7f0
x8 : ffff0000d3beb680 x7 : 0000000000000000 x6 : ffff80000805b058
x5 : ffff0000ca97eb30 x4 : 0000000000000000 x3 : ffff80000a90be40
x2 : 0000000000000001 x1 : 0000000000000007 x0 : 0000000000000103
Call trace:
 device_add_disk+0x5d8/0xad0 block/genhd.c:-1
 add_disk include/linux/genhd.h:200 [inline]
 loop_add+0x510/0x6e0 drivers/block/loop.c:2431
 loop_control_ioctl+0x128/0x4d0 drivers/block/loop.c:2546
 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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 434
hardirqs last  enabled at (433): [<ffff80000884d040>] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (434): [<ffff80001119f610>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (420): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (420): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (387): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (387): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (387): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (387): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
---[ end trace a71b4b1009987d3e ]---