------------[ cut here ]------------
WARNING: CPU: 0 PID: 4812 at block/genhd.c:590 del_gendisk+0x5a8/0x63c block/genhd.c:590
Modules linked in:
CPU: 0 PID: 4812 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : del_gendisk+0x5a8/0x63c block/genhd.c:590
lr : del_gendisk+0x5a8/0x63c block/genhd.c:590
sp : ffff80001fa47bd0
x29: ffff80001fa47bf0 x28: ffff0000c10e3680 x27: dfff800000000000
x26: 1fffe0001b023010 x25: 1fffe00019dcee92 x24: ffff0000d8118080
x23: ffff700003f48f90 x22: ffff0000d81180a0 x21: ffff0000d8118000
x20: ffff0000cc866388 x19: 0000000000000240 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082c17d0 x15: 0000000000004c82
x14: 0000000000000001 x13: 1ffff00003f48f74 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a63b0b0
x8 : ffff0000c10e3680 x7 : ffff80000bd2c0a4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800011328e44
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 del_gendisk+0x5a8/0x63c block/genhd.c:590
 loop_remove+0x44/0xdc drivers/block/loop.c:2453
 loop_control_remove drivers/block/loop.c:2510 [inline]
 loop_control_ioctl+0x418/0x4e0 drivers/block/loop.c:2548
 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+0x98/0x2b0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 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: 442
hardirqs last  enabled at (441): [<ffff800008846294>] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231
hardirqs last disabled at (442): [<ffff80001125ae10>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (424): [<ffff800008031f94>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (422): [<ffff800008031f60>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace f9f6eae1642eda78 ]---