------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888023257c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550, CPU#0: syz.1.5934/21054
Modules linked in:
CPU: 0 UID: 0 PID: 21054 Comm: syz.1.5934 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550
Code: 89 44 24 20 e8 c7 a6 76 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 d1 27 8c 48 c7 c2 c0 d6 27 8c 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000007b68 EFLAGS: 00010246
RAX: ffffffff8a96fb60 RBX: ffffffff9a4896e0 RCX: 0000000000000000
RDX: ffffffff8c27d6c0 RSI: ffffffff8c27d140 RDI: ffffffff901c8410
RBP: ffffffff8bcf3fa0 R08: ffff888023257c90 R09: ffffffff8bcf52c0
R10: dffffc0000000000 R11: ffffffff81b1f6d0 R12: ffff888023257e00
R13: ffffffff901c8410 R14: ffff888023257000 R15: ffff888023257c90
FS:  00007f353d0f06c0(0000) GS:ffff88818de5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64f5218440 CR3: 000000010f6a4000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 kfree+0x13a/0x630
 rose_timer_expiry+0x4cb/0x600
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:stack_trace_consume_entry+0x0/0x280
Code: f0 5b 41 5e 5d c3 cc cc cc cc cc e8 aa 41 fe 09 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00
RSP: 0018:ffffc90006e3efe0 EFLAGS: 00000286
RAX: ffffffff8224268b RBX: ffffc90006e3f0a0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8224268b RDI: ffffc90006e3f0a0
RBP: ffffc90006e3f070 R08: ffffc90006e3f370 R09: 0000000000000000
R10: ffffc90006e3f038 R11: ffffffff81b0cfd0 R12: ffff8881b8fe1d40
R13: 00000000ffffffff R14: ffffffff81b0cfd0 R15: ffffc90006e3efe8
 arch_stack_walk+0x10f/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x4db/0x7b0
 kstrdup+0x42/0x100
 __kernfs_new_node+0xa9/0x8e0
 kernfs_new_node+0x102/0x210
 __kernfs_create_file+0x4b/0x2e0
 sysfs_add_file_mode_ns+0x238/0x300
 internal_create_group+0x673/0x1180
 sysfs_create_groups+0x59/0x120
 ib_setup_port_attrs+0xf9c/0x2380
 add_one_compat_dev+0x448/0x650
 rdma_dev_init_net+0x243/0x2f0
 ops_init+0x35c/0x5c0
 setup_net+0x118/0x340
 copy_net_ns+0x50e/0x730
 create_new_namespaces+0x3e7/0x6a0
 unshare_nsproxy_namespaces+0x11a/0x160
 ksys_unshare+0x51d/0x930
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f353c19c819
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:00007f353d0f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f353c416090 RCX: 00007f353c19c819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f353c232c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f353c416128 R14: 00007f353c416090 R15: 00007ffef953ef58
 </TASK>
