------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888032999090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:615 at debug_print_object lib/debugobjects.c:612 [inline], CPU#1: syz.2.10980/6158
WARNING: lib/debugobjects.c:615 at __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline], CPU#1: syz.2.10980/6158
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1129, CPU#1: syz.2.10980/6158
Modules linked in:
CPU: 1 UID: 0 PID: 6158 Comm: syz.2.10980 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 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 57 fc 81 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 c0 3f 07 8c 48 c7 c2 40 45 07 8c 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:ffffc90000a08b70 EFLAGS: 00010246
RAX: ffffffff8a831ec0 RBX: ffffffff9a2b2180 RCX: 0000000000000000
RDX: ffffffff8c074540 RSI: ffffffff8c073fc0 RDI: ffffffff8ff9b040
RBP: ffffffff8baf3e40 R08: ffff888032999090 R09: ffffffff8baf5160
R10: dffffc0000000000 R11: ffffffff81b0d470 R12: ffff888032999200
R13: ffffffff8ff9b040 R14: ffff888032999000 R15: ffff888032999090
FS: 0000000000000000(0000) GS:ffff8881257f3000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3bf7c9de9c CR3: 0000000094c9a000 CR4: 00000000003526f0
Call Trace:
slab_free_hook mm/slub.c:2471 [inline]
slab_free mm/slub.c:6674 [inline]
kfree+0x139/0x650 mm/slub.c:6882
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/0x150 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:__tlb_remove_folio_pages+0x19/0x30 mm/mmu_gather.c:209
Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 53 89 cb 89 d5 49 89 f6 49 89 ff e8 c7 e8 ad ff <4c> 89 ff 4c 89 f6 89 ea 89 d9 5b 41 5e 41 5f 5d eb 15 0f 1f 44 00
RSP: 0018:ffffc9001b127438 EFLAGS: 00000293
RAX: ffffffff82168e39 RBX: 0000000000000000 RCX: ffff888033263d00
RDX: 0000000000000000 RSI: ffffea0001a55480 RDI: ffffc9001b127900
RBP: 0000000000000001 R08: ffffea0001a554b3 R09: 1ffffd400034aa96
R10: dffffc0000000000 R11: fffff9400034aa97 R12: 00007fe89d800000
R13: dffffc0000000000 R14: ffffea0001a55480 R15: ffffc9001b127900
zap_present_folio_ptes mm/memory.c:1659 [inline]
zap_present_ptes mm/memory.c:1712 [inline]
do_zap_pte_range mm/memory.c:1814 [inline]
zap_pte_range mm/memory.c:1858 [inline]
zap_pmd_range mm/memory.c:1950 [inline]
zap_pud_range mm/memory.c:1978 [inline]
zap_p4d_range mm/memory.c:1999 [inline]
unmap_page_range+0x1f1b/0x4030 mm/memory.c:2020
unmap_single_vma mm/memory.c:2062 [inline]
unmap_vmas+0x3c0/0x5c0 mm/memory.c:2104
exit_mmap+0x251/0xb30 mm/mmap.c:1277
__mmput+0x118/0x430 kernel/fork.c:1173
exit_mm+0x168/0x220 kernel/exit.c:581
do_exit+0x62e/0x2310 kernel/exit.c:959
do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
get_signal+0x1284/0x1330 kernel/signal.c:3034
arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x86/0x480 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+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe89e39aeb9
Code: Unable to access opcode bytes at 0x7fe89e39ae8f.
RSP: 002b:00007fe89f1b70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe89e615fa8 RCX: 00007fe89e39aeb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe89e615fa8
RBP: 00007fe89e615fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe89e616038 R14: 00007ffd20297580 R15: 00007ffd20297668
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 57 fc 81 fd call 0xfd81fc60
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 c0 3f 07 8c mov $0xffffffff8c073fc0,%rsi
1c: 48 c7 c2 40 45 07 8c mov $0xffffffff8c074540,%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