------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807cc09890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:615 at debug_print_object lib/debugobjects.c:612 [inline], CPU#1: syz.3.2001/13800
WARNING: lib/debugobjects.c:615 at __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline], CPU#1: syz.3.2001/13800
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1129, CPU#1: syz.3.2001/13800
Modules linked in:
CPU: 1 UID: 0 PID: 13800 Comm: syz.3.2001 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1129
Code: 89 44 24 20 e8 e7 04 8f fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 a0 89 c0 8b 48 c7 c2 c0 8e c0 8b 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000a08a70 EFLAGS: 00010246
RAX: ffffffff8a4c77f0 RBX: ffffffff99b2c998 RCX: 0000000000000000
RDX: ffffffff8bc08ec0 RSI: ffffffff8bc089a0 RDI: ffffffff8f8c7ec0
RBP: ffffffff8b6d2480 R08: ffff88807cc09890 R09: ffffffff8b6d35e0
R10: dffffc0000000000 R11: ffffffff81aeb740 R12: ffff88807cc09a00
R13: ffffffff8f8c7ec0 R14: ffff88807cc09000 R15: ffff88807cc09890
FS: 0000000000000000(0000) GS:ffff888125f35000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055559398f5c8 CR3: 0000000076136000 CR4: 0000000000350ef0
Call Trace:
slab_free_hook mm/slub.c:2471 [inline]
slab_free mm/slub.c:6668 [inline]
kfree+0x13b/0x660 mm/slub.c:6876
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
handle_softirqs+0x27d/0x850 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__folio_rmap_sanity_checks include/linux/rmap.h:457 [inline]
RIP: 0010:__folio_remove_rmap mm/rmap.c:1663 [inline]
RIP: 0010:folio_remove_rmap_ptes+0x227/0x1060 mm/rmap.c:1779
Code: e5 03 bf 03 00 00 00 4c 89 ee e8 a4 6a ac ff 49 83 fd 03 0f 95 c0 41 84 c6 75 11 e8 b3 65 ac ff 49 bd 00 00 00 00 00 fc ff df 4d 49 81 c6 9f 00 00 00 4c 89 f7 be 04 00 00 00 e8 d3 be 12 00
RSP: 0018:ffffc9000ccff308 EFLAGS: 00000293
RAX: ffffffff82154b4d RBX: ffffea00013730c0 RCX: ffff88802432bd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffffea00013730c7 R09: 1ffffd400026e618
R10: dffffc0000000000 R11: fffff9400026e619 R12: ffffea00013730d8
R13: dffffc0000000000 R14: ffff8880627ebdd8 R15: ffffea00013730c0
zap_present_folio_ptes mm/memory.c:1650 [inline]
zap_present_ptes mm/memory.c:1708 [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+0x1e1b/0x4170 mm/memory.c:2017
unmap_single_vma mm/memory.c:2059 [inline]
unmap_vmas+0x399/0x580 mm/memory.c:2101
exit_mmap+0x239/0xb10 mm/mmap.c:1277
__mmput+0x118/0x430 kernel/fork.c:1173
exit_mm+0x1da/0x2c0 kernel/exit.c:581
do_exit+0x658/0x2310 kernel/exit.c:959
do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2d0/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f969e58f749
Code: Unable to access opcode bytes at 0x7f969e58f71f.
RSP: 002b:00007f969f44b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f969e7e5fa8 RCX: 00007f969e58f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f969e7e5fa8
RBP: 00007f969e7e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f969e7e6038 R14: 00007ffeb2dc15b0 R15: 00007ffeb2dc1698
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 e7 04 8f fd call 0xfd8f04f0
9: 48 8b 44 24 20 mov 0x20(%rsp),%rax
e: 4c 8b 4d 00 mov 0x0(%rbp),%r9
12: 4c 89 ef mov %r13,%rdi
15: 48 c7 c6 a0 89 c0 8b mov $0xffffffff8bc089a0,%rsi
1c: 48 c7 c2 c0 8e c0 8b mov $0xffffffff8bc08ec0,%rdx
23: 8b 0c 24 mov (%rsp),%ecx
26: 4d 89 f8 mov %r15,%r8
29: 50 push %rax
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 6c 24 18 mov 0x18(%rsp),%r13
38: 48 rex.W
39: b9 00 00 00 00 mov $0x0,%ecx
3e: 00 fc add %bh,%ah