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ODEBUG: free active (active state 0) object: ffff88801dbe5490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 13688 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 13688 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 13688 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 13688 Comm: modprobe Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Code: 4c 8b 4d 00 48 c7 c7 20 98 1c 8b 48 c7 c6 80 94 1c 8b 48 c7 c2 a0 99 1c 8b 8b 0c 24 4d 89 f8 41 55 e8 de 83 1f fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 13 f6 59
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: 2276d8da00df9000 RBX: ffffffff974b5fb0 RCX: ffff88801e2d9e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8accac60 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88801dbe5600
R13: ffffffff897afb80 R14: ffff88801dbe5000 R15: ffff88801dbe5490
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6c75a4e9c CR3: 000000007d376000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4c6/0x5f0 net/rose/rose_timer.c:183
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__rcu_read_lock+0x38/0x60 kernel/rcu/tree_plugin.h:408
Code: 81 c3 3c 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 11 ff 03 8b 03 3d 00 00 00 40 7d 02 <5b> c3 0f 0b eb fa 89 d9 80 e1 07 80 c1 03 38 c1 7c e3 48 89 df e8
RSP: 0018:ffffc900034f7678 EFLAGS: 00000283
RAX: 0000000000000002 RBX: ffff88801e2da23c RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffea0000332b80
RBP: 0000000000000001 R08: ffffffff8e8b15ef R09: 1ffffffff1d162bd
R10: dffffc0000000000 R11: fffffbfff1d162be R12: dffffc0000000000
R13: 00007fe6c7726000 R14: ffffea0000332b80 R15: ffffea0000332b80
 rcu_read_lock include/linux/rcupdate.h:784 [inline]
 page_ext_get+0x1b/0x2b0 mm/page_ext.c:508
 page_table_check_clear+0x4a/0x6a0 mm/page_table_check.c:74
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 zap_pte_range mm/memory.c:1429 [inline]
 zap_pmd_range mm/memory.c:1571 [inline]
 zap_pud_range mm/memory.c:1600 [inline]
 zap_p4d_range mm/memory.c:1621 [inline]
 unmap_page_range+0x1ad9/0x3000 mm/memory.c:1642
 unmap_vmas+0x286/0x3f0 mm/memory.c:1732
 exit_mmap+0x238/0xb90 mm/mmap.c:3302
 __mmput+0x118/0x3c0 kernel/fork.c:1356
 exit_mm+0x1f2/0x2c0 kernel/exit.c:569
 do_exit+0x8dd/0x2460 kernel/exit.c:870
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe6c77036c5
Code: Unable to access opcode bytes at 0x7fe6c770369b.
RSP: 002b:00007ffed9cac218 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fe6c7804fe8 RCX: 00007fe6c77036c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000001
RBP: 0000000000000001 R08: 00007ffed9cac1a8 R09: 0000000000000000
R10: 00007ffed9cac040 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe6c7803680 R15: 00007fe6c7805000
 </TASK>
----------------
Code disassembly (best guess):
   0:	81 c3 3c 04 00 00    	add    $0x43c,%ebx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  14:	fc ff df
  17:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax
  1b:	84 c0                	test   %al,%al
  1d:	75 11                	jne    0x30
  1f:	ff 03                	incl   (%rbx)
  21:	8b 03                	mov    (%rbx),%eax
  23:	3d 00 00 00 40       	cmp    $0x40000000,%eax
  28:	7d 02                	jge    0x2c
* 2a:	5b                   	pop    %rbx <-- trapping instruction
  2b:	c3                   	ret
  2c:	0f 0b                	ud2
  2e:	eb fa                	jmp    0x2a
  30:	89 d9                	mov    %ebx,%ecx
  32:	80 e1 07             	and    $0x7,%cl
  35:	80 c1 03             	add    $0x3,%cl
  38:	38 c1                	cmp    %al,%cl
  3a:	7c e3                	jl     0x1f
  3c:	48 89 df             	mov    %rbx,%rdi
  3f:	e8                   	.byte 0xe8