------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888079217890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#0: syz.1.2229/14304
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#0: syz.1.2229/14304
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#0: syz.1.2229/14304
Modules linked in:
CPU: 0 UID: 0 PID: 14304 Comm: syz.1.2229 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 07 36 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 b8 27 8c 48 c7 c2 c0 bd 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: 0000:ffffc90000007b68 EFLAGS: 00010246
RAX: ffffffff8a965fb0 RBX: ffffffff9a4e9ed0 RCX: 0000000000000000
RDX: ffffffff8c27bdc0 RSI: ffffffff8c27b840 RDI: ffffffff901c02c0
RBP: ffffffff8bcf3ca0 R08: ffff888079217890 R09: ffffffff8bcf4fc0
R10: dffffc0000000000 R11: ffffffff81b1e270 R12: ffff888079217a00
R13: ffffffff901c02c0 R14: ffff888079217000 R15: ffff888079217890
FS:  00005555928d1500(0000) GS:ffff888125465000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2520120c0 CR3: 0000000075a2c000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2623 [inline]
 slab_free mm/slub.c:6143 [inline]
 kfree+0x13a/0x630 mm/slub.c:6461
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:91 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
RIP: 0010:unwind_next_frame+0x282/0x23c0 arch/x86/kernel/unwind_orc.c:510
Code: 45 24 a0 9c 90 48 81 fe 1c 3a 52 91 0f 83 30 04 00 00 4b 8d 04 40 48 8d 04 45 24 a0 9c 90 48 3d 1c 3a 52 91 0f 87 18 04 00 00 <45> 39 e8 48 bd 00 00 00 00 00 fc ff df 0f 84 1c 04 00 00 4a 8d 14
RSP: 0000:ffffc9000cc1f218 EFLAGS: 00000283
RAX: ffffffff90b266de RBX: dffffc0000000000 RCX: 0000000080000000
RDX: 00000000000ab27c RSI: ffffffff90b266a8 RDI: ffffffff8c27b1a0
RBP: ffffffff9156c104 R08: 000000000003a11f R09: ffffffff8e7602e0
R10: ffffc9000cc1f338 R11: ffffffff81b0bb70 R12: ffffffff8221b98b
R13: 000000000003a116 R14: ffffc9000cc1f2e8 R15: 00000000000121b9
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2484
 folio_alloc_mpol_noprof mm/mempolicy.c:2503 [inline]
 vma_alloc_folio_noprof+0xea/0x210 mm/mempolicy.c:2538
 folio_prealloc mm/memory.c:-1 [inline]
 wp_page_copy mm/memory.c:3780 [inline]
 do_wp_page+0x1204/0x5a00 mm/memory.c:4241
 handle_pte_fault mm/memory.c:6332 [inline]
 __handle_mm_fault mm/memory.c:6454 [inline]
 handle_mm_fault+0x1520/0x3310 mm/memory.c:6623
 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7ff251c65af5
Code: 41 5f c3 66 90 48 8b 57 18 48 83 fa ff 74 22 48 81 fa e7 03 00 00 0f 87 b0 00 00 00 48 c1 e2 04 48 8d 0d ce c5 3a 00 48 01 ca <c6> 02 01 48 89 42 08 49 8d 6c 24 10 4c 8d 74 24 08 49 bd 00 00 00
RSP: 002b:00007ffe97fadb10 EFLAGS: 00010206
RAX: 0000000000000004 RBX: 00000000000577fc RCX: 00007ff2520120c0
RDX: 00007ff2520120c0 RSI: 0000000000000080 RDI: 00007ff252015fa0
RBP: 0000000000000032 R08: 00007ff252015fa0 R09: 0000000000000000
R10: 00007ffe97fadc60 R11: 0000000000000246 R12: 00007ff252015fa0
R13: 00007ff252015fac R14: 000000000005782e R15: 00007ff252015fa0
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 07 36 77 fd       	call   0xfd773610
   9:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
   e:	4c 8b 4d 00          	mov    0x0(%rbp),%r9
  12:	4c 89 ef             	mov    %r13,%rdi
  15:	48 c7 c6 40 b8 27 8c 	mov    $0xffffffff8c27b840,%rsi
  1c:	48 c7 c2 c0 bd 27 8c 	mov    $0xffffffff8c27bdc0,%rdx
  23:	8b 0c 24             	mov    (%rsp),%ecx
  26:	4d 89 f8             	mov    %r15,%r8
  29:	50                   	push   %rax
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 6c 24 18       	mov    0x18(%rsp),%r13
  38:	48                   	rex.W
  39:	b9 00 00 00 00       	mov    $0x0,%ecx
  3e:	00 fc                	add    %bh,%ah