unregister_netdevice: waiting for lo to become free. Usage count = 0
kmemleak: Found object by alias at 0x607f1a63db04
CPU: 0 UID: 0 PID: 4059 Comm: syz-executor.3 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 __lookup_object+0x94/0xb0
 delete_object_full+0x27/0x70
 free_percpu+0x30/0x1160
 futex_hash_free+0x38/0xc0
 mmput+0x2d3/0x390
 do_exit+0x79d/0x2970
 do_group_exit+0xd3/0x2a0
 get_signal+0x2315/0x2340
 arch_do_signal_or_restart+0x80/0x790
 exit_to_user_mode_loop+0x8b/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcfac031b19
Code: Unable to access opcode bytes at 0x7fcfac031aef.
RSP: 002b:00007fcfa95a7218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fcfac144f68 RCX: 00007fcfac031b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fcfac144f6c
RBP: 00007fcfac144f60 R08: 0000000000000016 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fcfac144f6c
R13: 00007ffc9d146fef R14: 00007fcfa95a7300 R15: 0000000000022000
 </TASK>
kmemleak: Object (percpu) 0x607f1a63db00 (size 8):
kmemleak:   comm "syz-executor.3", pid 4059, jiffies 4294824441
kmemleak:   min_count = 1
kmemleak:   count = 0
kmemleak:   flags = 0x21
kmemleak:   checksum = 0
kmemleak:   backtrace:
 pcpu_alloc_noprof+0x87a/0x1170
 __alloc_workqueue+0x74b/0x1820
 alloc_workqueue_noprof+0xc7/0x200
 loop_configure+0xf73/0x1590
 lo_ioctl+0x66d/0x1c70
 blkdev_ioctl+0x27c/0x6c0
 __x64_sys_ioctl+0x18f/0x210
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
kmemleak: Cannot insert 0x607f1a63db04 into the object search tree (overlaps existing)
CPU: 1 UID: 0 PID: 4060 Comm: syz-executor.2 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 __link_object+0x190/0x210
 __create_object+0x48/0x80
 pcpu_alloc_noprof+0x87a/0x1170
 __percpu_counter_init_many+0x44/0x360
 xfrm6_net_init+0x4e/0x1a0
 ops_init+0x1e1/0x650
 setup_net+0x10d/0x320
 copy_net_ns+0x2e3/0x650
 create_new_namespaces+0x3f6/0xab0
 copy_namespaces+0x45c/0x580
 copy_process+0x2649/0x73c0
 kernel_clone+0xea/0x7f0
 __do_sys_clone3+0x1f5/0x280
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feca212cb19
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:00007fec9f6a2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007feca223ff60 RCX: 00007feca212cb19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007feca2186f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea9a2500f R14: 00007fec9f6a2300 R15: 0000000000022000
 </TASK>
kmemleak: Kernel memory leak detector disabled
kmemleak: Object (percpu) 0x607f1a63db00 (size 8):
kmemleak:   comm "syz-executor.3", pid 4059, jiffies 4294824441
kmemleak:   min_count = 1
kmemleak:   count = 0
kmemleak:   flags = 0x21
kmemleak:   checksum = 0
kmemleak:   backtrace:
 pcpu_alloc_noprof+0x87a/0x1170
 __alloc_workqueue+0x74b/0x1820
 alloc_workqueue_noprof+0xc7/0x200
 loop_configure+0xf73/0x1590
 lo_ioctl+0x66d/0x1c70
 blkdev_ioctl+0x27c/0x6c0
 __x64_sys_ioctl+0x18f/0x210
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
kmemleak: Automatic memory scanning thread ended
kmemleak: Found object by alias at 0x607f1a63ed44
CPU: 1 UID: 0 PID: 4070 Comm: syz-executor.7 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 __lookup_object+0x94/0xb0
 delete_object_full+0x27/0x70
 free_percpu+0x30/0x1160
 futex_hash_free+0x38/0xc0
 mmput+0x2d3/0x390
 do_exit+0x79d/0x2970
 do_group_exit+0xd3/0x2a0
 get_signal+0x2315/0x2340
 arch_do_signal_or_restart+0x80/0x790
 exit_to_user_mode_loop+0x8b/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f56717b9b19
Code: Unable to access opcode bytes at 0x7f56717b9aef.
RSP: 002b:00007f566ed0e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f56718cd028 RCX: 00007f56717b9b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f56718cd02c
RBP: 00007f56718cd020 R08: 0000000000000009 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f56718cd02c
R13: 00007ffebf912c4f R14: 00007f566ed0e300 R15: 0000000000022000
 </TASK>
kmemleak: Object (percpu) 0x607f1a63ed40 (size 8):
kmemleak:   comm "syz-executor.2", pid 4060, jiffies 4294824456
kmemleak:   min_count = 1
kmemleak:   count = 0
kmemleak:   flags = 0x21
kmemleak:   checksum = 0
kmemleak:   backtrace:
 pcpu_alloc_noprof+0x87a/0x1170
 percpu_ref_init+0x37/0x400
 cgroup_apply_control_enable+0x4a6/0x9f0
 cgroup_mkdir+0x86e/0x1110
 kernfs_iop_mkdir+0x111/0x190
 vfs_mkdir+0x59a/0x8d0
 do_mkdirat+0x19f/0x3d0
 __x64_sys_mkdirat+0x84/0xb0
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f