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ODEBUG: free active (active state 0) object: ffff88805dc89890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 1 PID: 14684 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 14684 Comm: syz.0.2465 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 21 d0 8b 4c 89 e6 48 c7 c7 20 16 d0 8b e8 9f a8 d1 fc 90 <0f> 0b 90 90 58 83 05 b6 51 b7 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff8179bd78
RDX: ffff88805dae8000 RSI: ffffffff8179bd85 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffffffffd9f60 R12: ffffffff8bd01cc0
R13: ffffffff8b6ffec0 R14: ffffffff8a41dfb0 R15: ffffc90000a08b18
FS: 0000000000000000(0000) GS:ffff888124f85000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa4fb3e7dac CR3: 000000005e4a3000 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:2445 [inline]
slab_free mm/slub.c:6566 [inline]
kfree+0x291/0x6d0 mm/slub.c:6773
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:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: 4c e2 11 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 d2 d0 c7 0e 0f 82 74 02 00 00 8b 35 2a 01 c8 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 29 4c e2 11 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90002e976c8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e1c4060 RCX: 0000000078e4eb4b
RDX: 0000000000000000 RSI: ffffffff8d7fb115 RDI: ffffffff8bd010c0
RBP: 0000000000000002 R08: 7f2fd16e60a37ad9 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:932 [inline]
pfn_valid+0x15c/0x4d0 include/linux/mmzone.h:2187
page_table_check_clear+0x21/0x740 mm/page_table_check.c:70
__page_table_check_pte_clear+0xf1/0x100 mm/page_table_check.c:154
page_table_check_pte_clear include/linux/page_table_check.h:51 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1270 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:725 [inline]
zap_present_folio_ptes mm/memory.c:1627 [inline]
zap_present_ptes mm/memory.c:1709 [inline]
do_zap_pte_range mm/memory.c:1810 [inline]
zap_pte_range mm/memory.c:1854 [inline]
zap_pmd_range mm/memory.c:1946 [inline]
zap_pud_range mm/memory.c:1975 [inline]
zap_p4d_range mm/memory.c:1996 [inline]
unmap_page_range+0x24d9/0x41b0 mm/memory.c:2017
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
__do_sys_exit_group kernel/exit.c:1118 [inline]
__se_sys_exit_group kernel/exit.c:1116 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f7a8138eec9
Code: Unable to access opcode bytes at 0x7f7a8138ee9f.
RSP: 002b:00007ffefc69bb58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a8138eec9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffefc69bbbc R08: 00000003fc69bc4f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000001e3
R13: 00000000000927c0 R14: 00000000000ae6a8 R15: 00007ffefc69bc10
----------------
Code disassembly (best guess):
0: 4c e2 11 rex.WR loop 0x14
3: 83 f8 07 cmp $0x7,%eax
6: 0f 87 bc 02 00 00 ja 0x2c8
c: 89 c0 mov %eax,%eax
e: 48 0f a3 05 d2 d0 c7 bt %rax,0xec7d0d2(%rip) # 0xec7d0e8
15: 0e
16: 0f 82 74 02 00 00 jb 0x290
1c: 8b 35 2a 01 c8 0e mov 0xec8012a(%rip),%esi # 0xec8014c
22: 85 f6 test %esi,%esi
24: 0f 85 8d 00 00 00 jne 0xb7
* 2a: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction
2f: 65 48 2b 05 29 4c e2 sub %gs:0x11e24c29(%rip),%rax # 0x11e24c60
36: 11
37: 0f 85 c7 02 00 00 jne 0x304
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c4 .byte 0xc4