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: 0 PID: 4455 at block/genhd.c:547 device_add_disk+0x5d8/0xad0 block/genhd.c:-1
Modules linked in:
CPU: 0 PID: 4455 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (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 : ffff80001f2b7b60
x29: ffff80001f2b7bc0 x28: dfff800000000000 x27: ffff0000e2028bc0
x26: ffff0000e20290bc x25: 00000000fffffff4 x24: ffff0000c9ddf8a0
x23: 1fffe000193bbf14 x22: 0000000000000001 x21: ffff0000c9ddf890
x20: 0000000000000007 x19: ffff0000c9ddf800 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111cbe1c x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a60470c
x8 : ffff0000d9ed8000 x7 : 0000000000000000 x6 : 0000000000000001
x5 : ffff80001f2b70d8 x4 : 0000000000000400 x3 : ffff80000a904100
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: 526
hardirqs last  enabled at (525): [<ffff8000111ca380>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (525): [<ffff8000111ca380>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (526): [<ffff8000111c767c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (520): [<ffff80000819e9f4>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (520): [<ffff80000819e9f4>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (349): [<ffff80000819eff8>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (349): [<ffff80000819eff8>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (349): [<ffff80000819eff8>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (349): [<ffff80000819eff8>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace 67e009c79688e26e ]---