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ODEBUG: free active (active state 0) object: ffff888054508890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 1 PID: 18977 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 18977 Comm: syz.4.3162 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+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd 20 87 f0 8b 4c 89 e6 48 c7 c7 a0 7b f0 8b e8 2f ab d0 fc 90 <0f> 0b 90 90 58 83 05 16 ea d7 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b2ee8
RDX: ffff88802adfbc80 RSI: ffffffff817b2ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf08240
R13: ffffffff8b9021a0 R14: ffffffff8a4bb170 R15: ffffc90000a08b18
FS: 0000000000000000(0000) GS:ffff888124b09000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffaa631afeb CR3: 00000000583db000 CR4: 0000000000350ef0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2470 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x291/0x6d0 mm/slub.c:6837
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers+0x6ef/0x960 kernel/time/timer.c:2372
__run_timer_base kernel/time/timer.c:2384 [inline]
__run_timer_base kernel/time/timer.c:2376 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2393
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:native_pmd_val arch/x86/include/asm/pgtable_types.h:401 [inline]
RIP: 0010:pmd_none arch/x86/include/asm/pgtable.h:1017 [inline]
RIP: 0010:is_swap_pmd include/linux/huge_mm.h:467 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1923 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1975 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1996 [inline]
RIP: 0010:unmap_page_range+0x8f5/0x41b0 mm/memory.c:2017
Code: 48 89 df e8 8d d1 b3 ff 4c 39 fb 49 0f 43 ed 48 89 6c 24 40 e8 cc d6 b3 ff 48 8b 84 24 80 00 00 00 48 c1 e8 03 42 80 3c 30 00 <0f> 85 e6 34 00 00 48 8b 84 24 80 00 00 00 31 ff 48 8b 28 48 89 eb
RSP: 0018:ffffc90004aa75f8 EFLAGS: 00000246
RAX: 1ffff1100ab8d096 RBX: 00007f25d2dfffff RCX: ffffffff82092673
RDX: ffff88802adfbc80 RSI: ffffffff82092684 RDI: 0000000000000006
RBP: 00007f25d2e00000 R08: 0000000000000006 R09: 00007f25d2dfffff
R10: 00007f25d2ffefff R11: 0000000000000001 R12: 000000000000000c
R13: 00007f25d2fff000 R14: dffffc0000000000 R15: 00007f25d2ffefff
unmap_single_vma.constprop.0+0x153/0x240 mm/memory.c:2060
unmap_vmas+0x218/0x470 mm/memory.c:2104
exit_mmap+0x1b2/0xb90 mm/mmap.c:1280
__mmput+0x12a/0x410 kernel/fork.c:1133
mmput+0x62/0x70 kernel/fork.c:1156
exit_mm kernel/exit.c:582 [inline]
do_exit+0x7c7/0x2bf0 kernel/exit.c:954
do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7c0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x85/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f25d31c3e09
Code: Unable to access opcode bytes at 0x7f25d31c3ddf.
RSP: 002b:00007ffe830cf1e8 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: 0000000000000033 RBX: 00007f25d31461f0 RCX: 00007f25d31c3e09
RDX: 00007f25d31461f0 RSI: 0000000000000058 RDI: 00007ffe830cf230
RBP: 00007f25d3f5c6c0 R08: 00007f25d3f5c6c0 R09: 00007ffe830cf317
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007ffe830cf230 R15: 00007ffe830cf318
----------------
Code disassembly (best guess):
0: 48 89 df mov %rbx,%rdi
3: e8 8d d1 b3 ff call 0xffb3d195
8: 4c 39 fb cmp %r15,%rbx
b: 49 0f 43 ed cmovae %r13,%rbp
f: 48 89 6c 24 40 mov %rbp,0x40(%rsp)
14: e8 cc d6 b3 ff call 0xffb3d6e5
19: 48 8b 84 24 80 00 00 mov 0x80(%rsp),%rax
20: 00
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
* 2a: 0f 85 e6 34 00 00 jne 0x3516 <-- trapping instruction
30: 48 8b 84 24 80 00 00 mov 0x80(%rsp),%rax
37: 00
38: 31 ff xor %edi,%edi
3a: 48 8b 28 mov (%rax),%rbp
3d: 48 89 eb mov %rbp,%rbx