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ODEBUG: free active (active state 0) object: ffff8880532f4c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880
WARNING: CPU: 1 PID: 26321 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 26321 Comm: syz.8.4899 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+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 a0 b4 cf 8b 4c 89 e6 48 c7 c7 20 a9 cf 8b e8 9f 1b d6 fc 90 <0f> 0b 90 90 58 83 05 e6 2c bc 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a28 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff81795e88
RDX: ffff88802c3e8000 RSI: ffffffff81795e95 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8bcfafc0
R13: ffffffff8b6fd820 R14: ffffffff8a3a3b30 R15: ffffc90000a08b28
FS: 00007faca354f6c0(0000) GS:ffff888124f82000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002f44b000 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:2353 [inline]
slab_free mm/slub.c:4695 [inline]
kfree+0x28f/0x4d0 mm/slub.c:4894
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:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: d6 e2 11 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 62 32 c8 0e 0f 82 74 02 00 00 8b 35 fa 63 c8 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 b9 d5 e2 11 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc9000acd73f8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e1c2120 RCX: 00000000c303b284
RDX: 0000000000000000 RSI: ffffffff8d988be1 RDI: ffffffff8bcfa3c0
RBP: 0000000000000002 R08: 87409380d4cfecf4 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
percpu_ref_tryget_many include/linux/percpu-refcount.h:241 [inline]
percpu_ref_tryget include/linux/percpu-refcount.h:266 [inline]
css_tryget include/linux/cgroup_refcnt.h:45 [inline]
css_tryget include/linux/cgroup_refcnt.h:42 [inline]
get_mem_cgroup_from_mm+0x27f/0x600 mm/memcontrol.c:939
__mem_cgroup_charge+0x1a/0x1e0 mm/memcontrol.c:4718
mem_cgroup_charge include/linux/memcontrol.h:654 [inline]
shmem_alloc_and_add_folio+0x514/0xc20 mm/shmem.c:1957
shmem_get_folio_gfp+0x67f/0x1600 mm/shmem.c:2597
shmem_fault+0x1fe/0xa30 mm/shmem.c:2798
__do_fault+0x10d/0x490 mm/memory.c:5152
do_read_fault mm/memory.c:5573 [inline]
do_fault mm/memory.c:5707 [inline]
do_pte_missing+0xf50/0x3ba0 mm/memory.c:4234
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x152a/0x2a50 mm/memory.c:6195
handle_mm_fault+0x589/0xd10 mm/memory.c:6364
faultin_page mm/gup.c:1144 [inline]
__get_user_pages+0x551/0x34a0 mm/gup.c:1446
populate_vma_page_range+0x267/0x3f0 mm/gup.c:1880
__mm_populate+0x1d8/0x380 mm/gup.c:1983
mm_populate include/linux/mm.h:3367 [inline]
vm_mmap_pgoff+0x37f/0x470 mm/util.c:585
ksys_mmap_pgoff+0x7d/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/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faca278eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faca354f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007faca29e5fa0 RCX: 00007faca278eec9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007faca2811f91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faca29e6038 R14: 00007faca29e5fa0 R15: 00007ffe34105ed8
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e2 11 loop 0x13
2: 83 f8 07 cmp $0x7,%eax
5: 0f 87 bc 02 00 00 ja 0x2c7
b: 89 c0 mov %eax,%eax
d: 48 0f a3 05 62 32 c8 bt %rax,0xec83262(%rip) # 0xec83277
14: 0e
15: 0f 82 74 02 00 00 jb 0x28f
1b: 8b 35 fa 63 c8 0e mov 0xec863fa(%rip),%esi # 0xec8641b
21: 85 f6 test %esi,%esi
23: 0f 85 8d 00 00 00 jne 0xb6
* 29: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction
2e: 65 48 2b 05 b9 d5 e2 sub %gs:0x11e2d5b9(%rip),%rax # 0x11e2d5ef
35: 11
36: 0f 85 c7 02 00 00 jne 0x303
3c: 48 rex.W
3d: 83 .byte 0x83
3e: c4 .byte 0xc4