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ODEBUG: free active (active state 0) object: ffff88805352a090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 1 PID: 12345 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 12345 Comm: syz.2.2040 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 bf 87 d0 fc 90 <0f> 0b 90 90 58 83 05 b6 e3 d7 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b1cd8
RDX: ffff88802e439e40 RSI: ffffffff817b1ce5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf08240
R13: ffffffff8b9021a0 R14: ffffffff8a4bc930 R15: ffffc90000a08b18
FS: 00007f51257816c0(0000) GS:ffff888124b07000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3681be CR3: 0000000029857000 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:2474 [inline]
slab_free mm/slub.c:6638 [inline]
kfree+0x291/0x6d0 mm/slub.c:6845
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:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 5d 31 5c 00 be 03 00 00 00 5b e9 d2 e7 e5 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 88 a7 e4 11 65 8b 05 99 a7 e4 11 a9 00 01 ff 00 74 1d
RSP: 0018:ffffc9000ac47658 EFLAGS: 00000246
RAX: 1ffffd400035d84c RBX: ffffea0001aec240 RCX: ffffc9000bf3c000
RDX: 0000000000080000 RSI: ffffffff81f3a9ba RDI: ffffea0001aec240
RBP: 0000000000000008 R08: 0000000000000006 R09: 0000000000000af7
R10: 0000000000000b36 R11: 0000000000000001 R12: 0000000000000af7
R13: ffffc9000ac479a0 R14: dffffc0000000000 R15: ffffea0001aec240
const_folio_flags.constprop.0+0xa/0x70 include/linux/page-flags.h:349
folio_test_head include/linux/page-flags.h:844 [inline]
folio_test_large include/linux/page-flags.h:865 [inline]
folio_nr_pages include/linux/mm.h:2072 [inline]
folio_next_index include/linux/pagemap.h:941 [inline]
filemap_map_pages+0x690/0x1d50 mm/filemap.c:3855
do_fault_around mm/memory.c:5674 [inline]
do_read_fault mm/memory.c:5707 [inline]
do_fault mm/memory.c:5850 [inline]
do_pte_missing+0xe33/0x3ba0 mm/memory.c:4362
handle_pte_fault mm/memory.c:6195 [inline]
__handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6336
handle_mm_fault+0x589/0xd10 mm/memory.c:6505
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0x54e/0x3530 mm/gup.c:1428
populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860
__mm_populate+0x1d8/0x380 mm/gup.c:1963
mm_populate include/linux/mm.h:3471 [inline]
vm_mmap_pgoff+0x37f/0x470 mm/util.c:586
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/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f512498f6c9
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:00007f5125781038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f5124be5fa0 RCX: 00007f512498f6c9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f5124a11f91 R08: ffffffffffffffff R09: 00000000ffffe000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5124be6038 R14: 00007f5124be5fa0 R15: 00007ffe18a92528
----------------
Code disassembly (best guess):
0: e9 5d 31 5c 00 jmp 0x5c3162
5: be 03 00 00 00 mov $0x3,%esi
a: 5b pop %rbx
b: e9 d2 e7 e5 02 jmp 0x2e5e7e2
10: 66 90 xchg %ax,%ax
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: f3 0f 1e fa endbr64
26: 48 8b 34 24 mov (%rsp),%rsi
* 2a: 65 48 8b 15 88 a7 e4 mov %gs:0x11e4a788(%rip),%rdx # 0x11e4a7ba <-- trapping instruction
31: 11
32: 65 8b 05 99 a7 e4 11 mov %gs:0x11e4a799(%rip),%eax # 0x11e4a7d2
39: a9 00 01 ff 00 test $0xff0100,%eax
3e: 74 1d je 0x5d