RBP: 00007fd98cea21d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffd7282c79f R14: 00007fd98cea2300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 17470 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 block/genhd.c:719 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 17470 Comm: syz-executor.5 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:__device_add_disk.cold+0x69/0x188 block/genhd.c:719 Code: 02 84 c0 74 08 3c 03 0f 8e a8 00 00 00 44 8b a5 f0 05 00 00 e9 88 db 6a fb e8 26 80 66 f9 48 c7 c7 e0 74 b2 88 e8 00 76 f7 ff <0f> 0b e9 b0 e7 6a fb e8 0e 80 66 f9 48 c7 c7 e0 74 b2 88 e8 e8 75 RSP: 0018:ffff88803e69fb38 EFLAGS: 00010286 RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff814e0d61 RDI: ffffed1007cd3f59 RBP: ffff8880b48e6380 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b48e6410 R13: ffff8880b48e6a10 R14: 00000000fffffff4 R15: ffff8880b48e6384 add_disk include/linux/genhd.h:409 [inline] loop_add+0x628/0x8a0 drivers/block/loop.c:2048 loop_control_ioctl drivers/block/loop.c:2149 [inline] loop_control_ioctl+0x16c/0x480 drivers/block/loop.c:2131 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd98cea2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000004 RBP: 00007fd98cea21d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffd7282c79f R14: 00007fd98cea2300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..