------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807c7f5c90 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.4.12983/24023
WARNING: lib/debugobjects.c:615 at __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline], CPU#1: syz.4.12983/24023
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1129, CPU#1: syz.4.12983/24023
Modules linked in:
CPU: 1 UID: 0 PID: 24023 Comm: syz.4.12983 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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 27 1f 87 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 c0 3e e7 8b 48 c7 c2 40 44 e7 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:ffffc90000a08b70 EFLAGS: 00010246
RAX: ffffffff8a66b320 RBX: ffffffff9a07f210 RCX: 0000000000000000
RDX: ffffffff8be74440 RSI: ffffffff8be73ec0 RDI: ffffffff8fd93ff0
RBP: ffffffff8b8f3e40 R08: ffff88807c7f5c90 R09: ffffffff8b8f5160
R10: dffffc0000000000 R11: ffffffff81af7940 R12: ffff88807c7f5e00
R13: ffffffff8fd93ff0 R14: ffff88807c7f5000 R15: ffff88807c7f5c90
FS: 00007fcc3f1d56c0(0000) GS:ffff888125a24000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc3f1d4ff8 CR3: 0000000087d36000 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:__sanitizer_cov_trace_switch+0x7/0x130 kernel/kcov.c:331
Code: 20 c3 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 06 <48> 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74
RSP: 0018:ffffc9000c5cfcf8 EFLAGS: 00000246
RAX: 000000000000000d RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88802d6d1e80 RSI: ffffffff8e3911e0 RDI: 0000000000000000
RBP: ffffc9000c5cfdc8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000c5cfe60 R11: fffff520018b9fce R12: ffffc9000c5cfd60
R13: 0000000000000000 R14: 1ffff920018b9fa8 R15: 0000000000000000
do_futex+0xea/0x420 kernel/futex/syscalls.c:125
__do_sys_futex kernel/futex/syscalls.c:207 [inline]
__se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:188
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc40f9acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcc3f1d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fcc41216098 RCX: 00007fcc40f9acb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcc41216098
RBP: 00007fcc41216090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc41216128 R14: 00007ffe72f096e0 R15: 00007ffe72f097c8
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 27 1f 87 fd call 0xfd871f30
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 3e e7 8b mov $0xffffffff8be73ec0,%rsi
1c: 48 c7 c2 40 44 e7 8b mov $0xffffffff8be74440,%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