------------[ cut here ]------------
WARNING: CPU: 0 PID: 5432 at block/bdev.c:794 bdev_is_partition include/linux/blkdev.h:1081 [inline]
WARNING: CPU: 0 PID: 5432 at block/bdev.c:794 blkdev_get_by_dev.part.0+0x789/0xa50 block/bdev.c:808
Modules linked in:
CPU: 0 PID: 5432 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:blkdev_get_by_dev.part.0+0x789/0xa50 block/bdev.c:794
Code: 49 8b 7d 78 89 44 24 08 e8 34 bd c6 fd 48 85 ed 4c 63 6c 24 08 0f 85 f9 f9 ff ff e9 5f fa ff ff e8 4c d8 1e fe e9 b6 fb ff ff <0f> 0b 49 c7 c5 fb ff ff ff e9 57 fa ff ff 48 8d ba f0 04 00 00 48
RSP: 0018:ffffc90004a0fce0 EFLAGS: 00010282
RAX: dffffc0000000000 RBX: ffff88801cdf2280 RCX: ffffffff892279b8
RDX: 1ffff110039be452 RSI: 0000000000000004 RDI: ffff88801cdf2ae0
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88801cdf2ae3
R10: ffffed10039be55c R11: 0000000000000000 R12: ffff88801dc4a000
R13: 00000000484a009d R14: 0000000000000000 R15: 0000000002b00000
FS:  00007fc4b4860700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc4b3ba80c0 CR3: 000000001dad1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 disk_scan_partitions+0x187/0x290 block/genhd.c:368
 blkdev_common_ioctl+0x4af/0x1620 block/ioctl.c:531
 blkdev_ioctl+0x272/0x6b0 block/ioctl.c:609
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x123/0x190 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc4b3a8c199
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc4b4860168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc4b3babf80 RCX: 00007fc4b3a8c199
RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003
RBP: 00007fc4b3ae7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeac07e7cf R14: 00007fc4b4860300 R15: 0000000000022000
 </TASK>