------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: rose_transmit_restart_request net/rose/rose_link.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:284
WARNING: CPU: 1 PID: 21873 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 21873 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 1 PID: 21873 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 1 PID: 21873 Comm: syz.4.4801 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 18 00 be fd 4c 8b 45 00 48 c7 c7 80 15 df 8a 48 c7 c6 40 12 df 8a 48 c7 c2 e0 16 df 8a 8b 0c 24 4d 89 e9 e8 54 87 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 85 9a 0a
RSP: 0000:ffffc900001e0a10 EFLAGS: 00010246
RAX: f1dcc6857b616800 RBX: ffffffff96e820b8 RCX: ffff8880266c3b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8def40 R08: ffffc900001e0687 R09: 1ffff9200003c0d0
R10: dffffc0000000000 R11: fffff5200003c0d1 R12: ffff888078767200
R13: ffffffff892a2900 R14: ffff888078767000 R15: ffff888078767090
FS: 000055557ed86500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2ced68 CR3: 00000000518b2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_free_hook mm/slub.c:1704 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4a7/0x5d0 net/rose/rose_timer.c:183
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x36/0xa0 kernel/rcu/tree.c:721
Code: e8 2f f6 bf 08 89 c3 83 f8 08 73 60 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 80 f9 64 8c 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 10 ea 66 00 48 c7 c3 08 58 03 00 49 03 1e 48 89
RSP: 0000:ffffc900038af8c0 EFLAGS: 00000246
RAX: 1ffffffff18c9f31 RBX: 0000000000000001 RCX: f1dcc6857b616800
RDX: 0000000000000000 RSI: ffffffff8adf0c00 RDI: ffffffff8adf0bc0
RBP: ffffc900038af9f0 R08: ffffffff8e1fc32f R09: 1ffffffff1c3f865
R10: dffffc0000000000 R11: fffffbfff1c3f866 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8c64f988 R15: dffffc0000000000
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xcf/0x920 kernel/locking/lockdep.c:5673
rcu_lock_release include/linux/rcupdate.h:355 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:904 [inline]
pfn_valid+0x3c5/0x420 include/linux/mmzone.h:1867
page_table_check_set+0x25/0x6d0 mm/page_table_check.c:108
page_table_check_pte_set include/linux/page_table_check.h:83 [inline]
set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline]
do_set_pte+0x452/0x460 mm/memory.c:4424
filemap_map_pages+0xc8b/0x11c0 mm/filemap.c:3513
do_fault_around mm/memory.c:4598 [inline]
do_read_fault mm/memory.c:4624 [inline]
do_fault mm/memory.c:4758 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x2991/0x3ee0 mm/memory.c:5292
do_user_addr_fault+0x51f/0xb10 arch/x86/mm/fault.c:1340
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f46fa26f696
Code: ff 48 83 e8 01 48 89 de bf 01 00 00 00 48 c1 e0 0e 48 c1 ee 06 48 01 c8 48 89 d9 81 e6 ff 3f 00 00 48 c1 e9 03 83 e1 07 d3 e7 <40> 84 bc 06 20 20 00 00 0f 85 20 fe ff ff e9 d4 fd ff ff 0f 1f 80
RSP: 002b:00007ffe6ca3acb0 EFLAGS: 00010202
RAX: 000000110c2cc000 RBX: ffffffff81a35238 RCX: 0000000000000007
RDX: 0000000000001238 RSI: 0000000000000d48 RDI: 0000000000000080
RBP: 0000000000000000 R08: 00007f46fa600000 R09: 00007f46fa602000
R10: 0000000081a3523c R11: 0000000000000000 R12: 00007f46fa616038
R13: 0000000000000068 R14: ffffffff81a35d65 R15: 00007f46fb145720
----------------
Code disassembly (best guess):
0: e8 2f f6 bf 08 call 0x8bff634
5: 89 c3 mov %eax,%ebx
7: 83 f8 08 cmp $0x8,%eax
a: 73 60 jae 0x6c
c: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
13: fc ff df
16: 4c 8d 34 dd 80 f9 64 lea -0x739b0680(,%rbx,8),%r14
1d: 8c
1e: 4c 89 f0 mov %r14,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 f7 mov %r14,%rdi
2f: e8 10 ea 66 00 call 0x66ea44
34: 48 c7 c3 08 58 03 00 mov $0x35808,%rbx
3b: 49 03 1e add (%r14),%rbx
3e: 48 rex.W
3f: 89 .byte 0x89