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ODEBUG: free active (active state 0) object: ffff8880561e9890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 1 PID: 14068 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 14068 Comm: syz.4.1814 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 ef f1 8b 4c 89 e6 48 c7 c7 a0 e3 f1 8b e8 8f 81 c7 fc 90 <0f> 0b 90 90 58 83 05 96 6f cf 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b7ee8
RDX: ffff8880265a4900 RSI: ffffffff817b7ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf1ea40
R13: ffffffff8b901fe0 R14: ffffffff8a550be0 R15: ffffc90000a08b18
FS: 000055556d7c4500(0000) GS:ffff888124ad1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002a000 CR3: 0000000079455000 CR4: 00000000003526f0
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:2461 [inline]
slab_free mm/slub.c:6619 [inline]
kfree+0x291/0x6d0 mm/slub.c:6826
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:check_preemption_disabled+0x1d/0xe0 lib/smp_processor_id.c:54
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d f5 f5 3c 08 65 8b 05 ea f5 3c 08 a9 ff ff ff 7f 74 0f <48> 83 c4 08 89 d8 5b 5d 41 5c e9 44 ed 02 00 9c 58 f6 c4 02 74 ea
RSP: 0018:ffffc9000fc87540 EFLAGS: 00000202
RAX: 0000000080000001 RBX: 0000000000000001 RCX: 1ffffffff2106d6a
RDX: 0000000000000000 RSI: ffffffff8b9a8120 RDI: ffffffff8bf1de40
RBP: ffffffff93a6f953 R08: 69f9a5a9c0a8208b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88813fffb400
R13: 0000000000000012 R14: 0000000000000001 R15: ffffffff93a6f940
__mod_node_page_state+0xb5/0x1d0 mm/vmstat.c:400
__folio_mod_stat mm/rmap.c:1232 [inline]
__folio_add_rmap mm/rmap.c:1324 [inline]
__folio_add_file_rmap mm/rmap.c:1602 [inline]
folio_add_file_rmap_ptes+0x5e7/0xdb0 mm/rmap.c:1628
insert_page_into_pte_locked+0x63b/0xb40 mm/memory.c:2310
insert_page+0x12d/0x200 mm/memory.c:2330
vm_insert_page+0x2c1/0x440 mm/memory.c:2481
kcov_mmap+0xbf/0x140 kernel/kcov.c:506
vfs_mmap include/linux/fs.h:2405 [inline]
mmap_file mm/internal.h:167 [inline]
__mmap_new_file_vma mm/vma.c:2413 [inline]
__mmap_new_vma mm/vma.c:2476 [inline]
__mmap_region+0x1309/0x27a0 mm/vma.c:2670
mmap_region+0x32b/0x3f0 mm/vma.c:2740
do_mmap+0xa3e/0x1210 mm/mmap.c:558
vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb20f38f003
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7
RSP: 002b:00007ffc516d9ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fb20f5e6308 RCX: 00007fb20f38f003
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007fb20d1f6000
RBP: 00007fb20f5e6270 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000003
R13: 00007fb20f5e6270 R14: 0000000000001c51 R15: 0000000000000003
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 41 54 push %r12
f: 55 push %rbp
10: 53 push %rbx
11: 48 83 ec 08 sub $0x8,%rsp
15: 65 8b 1d f5 f5 3c 08 mov %gs:0x83cf5f5(%rip),%ebx # 0x83cf611
1c: 65 8b 05 ea f5 3c 08 mov %gs:0x83cf5ea(%rip),%eax # 0x83cf60d
23: a9 ff ff ff 7f test $0x7fffffff,%eax
28: 74 0f je 0x39
* 2a: 48 83 c4 08 add $0x8,%rsp <-- trapping instruction
2e: 89 d8 mov %ebx,%eax
30: 5b pop %rbx
31: 5d pop %rbp
32: 41 5c pop %r12
34: e9 44 ed 02 00 jmp 0x2ed7d
39: 9c pushf
3a: 58 pop %rax
3b: f6 c4 02 test $0x2,%ah
3e: 74 ea je 0x2a