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ODEBUG: free active (active state 0) object: ffff888059826c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 12944 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 12944 Comm: syz.1.1734 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 77 e4 92 fd 4d 8b 0f 48 c7 c7 80 0f bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 4a 4b f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 57 32 ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 89ecf3d1b2235b00 RBX: dffffc0000000000 RCX: ffff8880207a8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba650 R12: ffffffff8a393ee0
R13: ffffffff8bbf1100 R14: ffff888059826c90 R15: ffffffff8b6cf600
FS: 00007f5169e726c0(0000) GS:ffff88812623d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c3d1b CR3: 0000000031b4e000 CR4: 00000000003526f0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2470 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x115/0x6d0 mm/slub.c:6837
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_vcpu_is_preempted arch/x86/include/asm/paravirt.h:579 [inline]
RIP: 0010:vcpu_is_preempted arch/x86/include/asm/qspinlock.h:63 [inline]
RIP: 0010:owner_on_cpu include/linux/sched.h:2282 [inline]
RIP: 0010:rwsem_spin_on_owner+0x198/0x2b0 kernel/locking/rwsem.c:780
Code: 00 0f 84 f3 00 00 00 48 8b 44 24 18 42 0f b6 04 28 84 c0 0f 85 9a 00 00 00 48 8b 04 24 44 8b 20 48 8b 44 24 10 42 80 3c 28 00 <74> 0c 48 c7 c7 50 8c da 8d e8 0a ab 88 00 48 83 3d c2 7d 3d 0c 00
RSP: 0018:ffffc90002dd7220 EFLAGS: 00000246
RAX: 1ffffffff1bb518a RBX: ffff88801c6a8120 RCX: ffff88802f573c80
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801c6a8120
RBP: 0000000000000008 R08: ffff88801c6a8127 R09: 1ffff110038d5024
R10: dffffc0000000000 R11: ffffed10038d5025 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88802f573c80 R15: 1ffff110038d5024
rwsem_optimistic_spin kernel/locking/rwsem.c:836 [inline]
rwsem_down_write_slowpath+0x20d/0xfe0 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
kernfs_activate fs/kernfs/dir.c:1425 [inline]
kernfs_add_one+0x2c2/0x520 fs/kernfs/dir.c:834
__kernfs_create_file+0x22b/0x2e0 fs/kernfs/file.c:1086
sysfs_add_file_mode_ns+0x238/0x300 fs/sysfs/file.c:313
create_files fs/sysfs/group.c:76 [inline]
internal_create_group+0x66d/0x1110 fs/sysfs/group.c:183
internal_create_groups fs/sysfs/group.c:223 [inline]
sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:249
setup_port drivers/infiniband/core/sysfs.c:1247 [inline]
ib_setup_port_attrs+0xd9b/0x2070 drivers/infiniband/core/sysfs.c:1433
add_one_compat_dev+0x3d6/0x5c0 drivers/infiniband/core/device.c:1005
rdma_dev_init_net+0x1dd/0x270 drivers/infiniband/core/device.c:1221
ops_init+0x35c/0x5c0 net/core/net_namespace.c:137
setup_net+0xfe/0x320 net/core/net_namespace.c:446
copy_net_ns+0x34e/0x4e0 net/core/net_namespace.c:581
create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218
ksys_unshare+0x4c8/0x8c0 kernel/fork.c:3129
__do_sys_unshare kernel/fork.c:3200 [inline]
__se_sys_unshare kernel/fork.c:3198 [inline]
__x64_sys_unshare+0x38/0x50 kernel/fork.c:3198
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5168f8f6c9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5169e72038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f51691e5fa0 RCX: 00007f5168f8f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f5169011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f51691e6038 R14: 00007f51691e5fa0 R15: 00007ffd878ad778
----------------
Code disassembly (best guess):
0: 00 0f add %cl,(%rdi)
2: 84 f3 test %dh,%bl
4: 00 00 add %al,(%rax)
6: 00 48 8b add %cl,-0x75(%rax)
9: 44 24 18 rex.R and $0x18,%al
c: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
11: 84 c0 test %al,%al
13: 0f 85 9a 00 00 00 jne 0xb3
19: 48 8b 04 24 mov (%rsp),%rax
1d: 44 8b 20 mov (%rax),%r12d
20: 48 8b 44 24 10 mov 0x10(%rsp),%rax
25: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
* 2a: 74 0c je 0x38 <-- trapping instruction
2c: 48 c7 c7 50 8c da 8d mov $0xffffffff8dda8c50,%rdi
33: e8 0a ab 88 00 call 0x88ab42
38: 48 83 3d c2 7d 3d 0c cmpq $0x0,0xc3d7dc2(%rip) # 0xc3d7e02
3f: 00