RAX: ffffffffffffffda RBX: 00007f23e1ab5c90 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f23e1ab66d4 R13: 00000000004c1108 R14: 00000000004d2ed0 R15: 0000000000000005 WARNING: CPU: 1 PID: 25554 at block/genhd.c:717 __device_add_disk+0xef6/0x1160 block/genhd.c:717 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 25554 Comm: syz-executor0 Not tainted 5.0.0-rc4+ #58 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x45 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:__device_add_disk+0xef6/0x1160 block/genhd.c:717 Code: f0 2d 53 fe 0f 0b e9 98 fb ff ff 48 89 bd 18 ff ff ff e8 dd 2d 53 fe 0f 0b 48 8b bd 18 ff ff ff e9 bf f7 ff ff e8 ca 2d 53 fe <0f> 0b e9 80 fe ff ff e8 de 76 26 fe 4c 89 e7 e8 76 29 8a fe e9 45 RSP: 0018:ffff8880553efaf8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff8880553efbe8 RCX: ffffc9000740d000 RDX: 0000000000040000 RSI: ffffffff831cae46 RDI: 0000000000000005 netlink: 59 bytes leftover after parsing attributes in process `syz-executor3'. RBP: ffff8880553efc10 R08: ffff88808dca6480 R09: ffffed1015d25bd0 R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88805de68080 R13: ffff88805de68110 R14: 00000000fffffff4 R15: 0000000000000000 device_add_disk+0x2b/0x40 block/genhd.c:739 add_disk include/linux/genhd.h:422 [inline] loop_add+0x635/0x8d0 drivers/block/loop.c:1999 loop_control_ioctl drivers/block/loop.c:2100 [inline] loop_control_ioctl+0x165/0x360 drivers/block/loop.c:2082 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 netlink: 59 bytes leftover after parsing attributes in process `syz-executor3'. __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f23e1ab5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f23e1ab5c90 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f23e1ab66d4 R13: 00000000004c1108 R14: 00000000004d2ed0 R15: 0000000000000005 Kernel Offset: disabled Rebooting in 86400 seconds..