------------[ cut here ]------------
WARNING: CPU: 1 PID: 4855 at block/genhd.c:590 del_gendisk+0x5a8/0x644 block/genhd.c:590
Modules linked in:
CPU: 1 PID: 4855 Comm: syz.2.180 Not tainted 5.15.186-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 : del_gendisk+0x5a8/0x644 block/genhd.c:590
lr : del_gendisk+0x5a8/0x644 block/genhd.c:590
sp : ffff80001fe07bd0
x29: ffff80001fe07bf0 x28: ffff0000d1c6d1c0 x27: dfff800000000000
x26: 1fffe0001d452d10 x25: 1fffe0001b111e92 x24: ffff0000ea296880
x23: dfff800000000000 x22: ffff0000ea2968a0 x21: ffff0000ea296800
x20: ffff0000cc936388 x19: 0000000000000240 x18: 0000000000000000
x17: 0000000000000002 x16: ffff8000082bf708 x15: 0000000000004c82
x14: 0000000000ff0100 x13: 1ffff0000282c06b x12: 0000000000080000
x11: 0000000000000f53 x10: ffff800023e39000 x9 : ffff80000a6118cc
x8 : 0000000000000f54 x7 : ffff80000bcdb568 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80001127c448
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 del_gendisk+0x5a8/0x644 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+0x408/0x4d0 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+0x98/0x2b8 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: 300
hardirqs last  enabled at (299): [<ffff80000884efa0>] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (300): [<ffff8000111adf74>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (274): [<ffff800008031f40>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (272): [<ffff800008031f0c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace f3f4c49ff6391a66 ]---