el0_svc_common+0x40/0xfc arch/arm64/kernel/syscall.c:142 do_el0_svc+0x78/0x90 arch/arm64/kernel/syscall.c:181 el0_svc+0x2c/0x54 arch/arm64/kernel/entry-common.c:511 el0t_64_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:527 el0t_64_sync+0x1b4/0x1b8 arch/arm64/kernel/entry.S:574 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8203 at block/genhd.c:523 __device_add_disk+0x318/0x350 block/genhd.c:492 Modules linked in: CPU: 0 PID: 8203 Comm: syz-executor.0 Not tainted 5.14.0-rc4-syzkaller-00235-gc9194f32bfd9 #0 Hardware name: linux,dummy-virt (DT) pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--) pc : __device_add_disk+0x318/0x350 block/genhd.c:523 lr : __device_add_disk+0x1d0/0x350 block/genhd.c:521 sp : ffff800014223d00 x29: ffff800014223d00 x28: fcff0000028dbd00 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000000000 x24: f0ff000003fee000 x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000 x20: f0ff000002d64b40 x19: f1ff000007c4ec00 x18: 00000000fffffffb x17: 7a79732d3463722d x16: 302e34312e352064 x15: 0000000000000020 x14: 0000000000000000 x13: 0000000000000a54 x12: ffff800014223690 x11: ffff8000122bcd38 x10: 00000000ffffe000 x9 : ffff8000122bcd38 x8 : ffff80001220cd38 x7 : ffff8000122bcd38 x6 : 0000000000000000 x5 : ffff00007fbb0988 x4 : ffff800014223fe0 x3 : 0000000000000000 x2 : 0000000000000000 x1 : fcff0000028dbd00 x0 : fffffffffffffff4 Call trace: __device_add_disk+0x318/0x350 block/genhd.c:492 device_add_disk+0x14/0x20 block/genhd.c:548 add_disk include/linux/genhd.h:217 [inline] loop_add+0x208/0x254 drivers/block/loop.c:2395 loop_control_ioctl+0xa8/0x1e0 drivers/block/loop.c:2492 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __arm64_sys_ioctl+0xa8/0xec fs/ioctl.c:1055 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x40/0xfc arch/arm64/kernel/syscall.c:142 do_el0_svc+0x78/0x90 arch/arm64/kernel/syscall.c:181 el0_svc+0x2c/0x54 arch/arm64/kernel/entry-common.c:511 el0t_64_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:527 el0t_64_sync+0x1b4/0x1b8 arch/arm64/kernel/entry.S:574 ---[ end trace 55c6b123391788e1 ]---