RDX: 00000000fdfdffff RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f899a9ce120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f899b77bf80 R15: 00007ffd3a9a32f8
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4611 at block/genhd.c:547 device_add_disk+0x76b/0xd40 block/genhd.c:545
Modules linked in:
CPU: 1 PID: 4611 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:device_add_disk+0x76b/0xd40 block/genhd.c:547
Code: b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 b0 04 00 00 8b 33 48 c7 c7 a0 e4 8f 8c e8 bc 56 37 00 eb 05 e8 b5 45 ab fd <0f> 0b 41 bf 01 00 00 00 44 89 f8 48 83 c4 70 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90002e4fcf8 EFLAGS: 00010293
RAX: ffffffff83ce033b RBX: ffff8880236e7800 RCX: ffff888027381dc0
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000103
RBP: 0000000000000007 R08: ffff888017098c3b R09: 1ffff11002e13187
R10: dffffc0000000000 R11: ffffed1002e13188 R12: ffff888017098c00
R13: 1ffff110046dcf00 R14: dffffc0000000000 R15: 00000000ffffffea
FS:  00007f899a9ce6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff44dbba6b0 CR3: 00000000679d5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 add_disk include/linux/genhd.h:200 [inline]
 loop_add+0x5f2/0x8a0 drivers/block/loop.c:2431
 loop_control_ioctl+0x127/0x560 drivers/block/loop.c:2546
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f899b63d0f9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f899a9ce0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f899b77bf80 RCX: 00007f899b63d0f9
RDX: 00000000fdfdffff RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f899a9ce120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f899b77bf80 R15: 00007ffd3a9a32f8
 </TASK>