------------[ cut here ]------------
WARNING: CPU: 0 PID: 4342 at block/genhd.c:547 device_add_disk+0x731/0xd00 block/genhd.c:545
Modules linked in:

CPU: 0 PID: 4342 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:device_add_disk+0x731/0xd00 block/genhd.c:547
Code: b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 a9 04 00 00 8b 33 48 c7 c7 80 f1 90 8c e8 76 3e 37 00 eb 05 e8 af a8 a6 fd <0f> 0b 41 bd 01 00 00 00 44 89 e8 48 83 c4 50 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000357f9d8 EFLAGS: 00010246

RAX: ffffffff83d258d1 RBX: ffff8880628b6800 RCX: 0000000000080000
RDX: ffffc9000c8c1000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000fe R08: ffffc9000357f867 R09: 1ffff920006aff0c
R10: dffffc0000000000 R11: fffff520006aff0d R12: ffff8880181bf230
R13: ffff8881408897c0 R14: 1ffff1100c516d00 R15: ffff8881408897c0
FS:  00007f307df0b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055de11244010 CR3: 0000000023a12000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 add_disk include/linux/genhd.h:200 [inline]
 md_alloc+0x80e/0xc10 drivers/md/md.c:5782
 blk_probe_dev block/genhd.c:685 [inline]
 blk_request_module+0x26e/0x290 block/genhd.c:-1
 blkdev_get_no_open+0x38/0x1d0 block/bdev.c:736
 blkdev_get_by_dev+0x77/0xa50 block/bdev.c:803
 swsusp_check+0xa1/0x2b0 kernel/power/swap.c:1526
 software_resume+0xc6/0x3b0 kernel/power/hibernate.c:982
 resume_store+0xe4/0x130 kernel/power/hibernate.c:1184
 kernfs_fop_write_iter+0x3a8/0x500 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:2173 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 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: 0033:0x7f307fcb2f99
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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f307df0b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f307ff3afa0 RCX: 00007f307fcb2f99
RDX: 000000000000001f RSI: 0000200000000000 RDI: 000000000000000b
RBP: 00007f307fd49ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f307ff3b038 R14: 00007f307ff3afa0 R15: 00007ffc24ea42e8
 </TASK>