------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88805846c890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 8236 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 8236 Comm: syz.4.14840 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 87 9e 8d fd 4d 8b 0f 48 c7 c7 00 45 c0 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 0a 11 ec fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 56 07 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007a10 EFLAGS: 00010292
RAX: 50945e998a1c8f00 RBX: dffffc0000000000 RCX: ffff88802f008000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa138 R12: ffffffff8a37aee0
R13: ffffffff8bc04680 R14: ffff88805846c890 R15: ffffffff8b6ce100
FS: 0000000000000000(0000) GS:ffff888125d3b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c320bf5 CR3: 000000000df36000 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:2353 [inline]
slab_free mm/slub.c:4695 [inline]
kfree+0x112/0x440 mm/slub.c:4894
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+0x283/0x870 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:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:118 [inline]
RIP: 0010:lock_release+0x63/0x3e0 kernel/locking/lockdep.c:5881
Code: 00 89 c0 48 0f a3 05 7c d8 00 0e 73 16 e8 55 f5 08 00 84 c0 75 0d f6 05 bf e8 ea 0d 01 0f 84 ad 02 00 00 83 3d 9d 09 01 0e 00 <0f> 84 44 02 00 00 65 8b 05 90 1c f2 10 85 c0 0f 85 35 02 00 00 65
RSP: 0018:ffffc9000b6b74f0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff822f0dfa RCX: 50945e998a1c8f00
RDX: 0000000000000000 RSI: ffffffff8bc03b40 RDI: ffffffff8bc03b00
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff822f0dfa
R10: dffffc0000000000 R11: fffff940002dd231 R12: dffffc0000000000
R13: ffffffff822f0dfa R14: ffffffff8e13aa20 R15: ffff88813fffa560
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:953 [inline]
pfn_valid+0x3b2/0x490 include/linux/mmzone.h:2172
page_table_check_clear+0x21/0x700 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:725 [inline]
zap_present_folio_ptes mm/memory.c:1499 [inline]
zap_present_ptes mm/memory.c:1581 [inline]
do_zap_pte_range mm/memory.c:1682 [inline]
zap_pte_range mm/memory.c:1726 [inline]
zap_pmd_range mm/memory.c:1818 [inline]
zap_pud_range mm/memory.c:1847 [inline]
zap_p4d_range mm/memory.c:1868 [inline]
unmap_page_range+0x3445/0x4370 mm/memory.c:1889
unmap_single_vma mm/memory.c:1932 [inline]
unmap_vmas+0x399/0x580 mm/memory.c:1976
exit_mmap+0x248/0xb50 mm/mmap.c:1280
__mmput+0x118/0x430 kernel/fork.c:1130
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:949
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f3725b8eec9
Code: Unable to access opcode bytes at 0x7f3725b8ee9f.
RSP: 002b:00007ffd34252608 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3725b8eec9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd3425266c R08: 0000000f342526ff R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000b12
R13: 00000000000927c0 R14: 00000000000c1986 R15: 00007ffd342526c0
----------------
Code disassembly (best guess):
0: 00 89 c0 48 0f a3 add %cl,-0x5cf0b740(%rcx)
6: 05 7c d8 00 0e add $0xe00d87c,%eax
b: 73 16 jae 0x23
d: e8 55 f5 08 00 call 0x8f567
12: 84 c0 test %al,%al
14: 75 0d jne 0x23
16: f6 05 bf e8 ea 0d 01 testb $0x1,0xdeae8bf(%rip) # 0xdeae8dc
1d: 0f 84 ad 02 00 00 je 0x2d0
23: 83 3d 9d 09 01 0e 00 cmpl $0x0,0xe01099d(%rip) # 0xe0109c7
* 2a: 0f 84 44 02 00 00 je 0x274 <-- trapping instruction
30: 65 8b 05 90 1c f2 10 mov %gs:0x10f21c90(%rip),%eax # 0x10f21cc7
37: 85 c0 test %eax,%eax
39: 0f 85 35 02 00 00 jne 0x274
3f: 65 gs