syzbot

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ODEBUG: free active (active state 0) object: ffff888021d45c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 0 PID: 16635 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 16635 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 0 PID: 16635 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 0 PID: 16635 Comm: syz.2.2875 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Code: 4c 8b 4d 00 48 c7 c7 60 8f 1c 8b 48 c7 c6 c0 8b 1c 8b 48 c7 c2 e0 90 1c 8b 8b 0c 24 4d 89 f8 41 55 e8 5e fe 1f fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 73 4b 5a
RSP: 0018:ffffc90000007a50 EFLAGS: 00010296
RAX: 5d71ed6d866e3900 RBX: ffffffff97559ec0 RCX: ffff88802a3eda00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8accab80 R08: ffffc90000007647 R09: 1ffff92000000ec8
R10: dffffc0000000000 R11: fffff52000000ec9 R12: ffff888021d45e00
R13: ffffffff8979eb80 R14: ffff888021d45000 R15: ffff888021d45c90
FS:  00007f15a959b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15a959aff8 CR3: 0000000030dba000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4c6/0x5f0 net/rose/rose_timer.c:183
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1392
Code: 5d 41 5e 41 5f 5d c3 e8 fb 35 26 09 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 53 eb 11 e8 34 df 2f 09 e8 cf ae 2e 00 fb 5b <41> 5e 41 5f c3 49 be 00 00 00 00 00 fc ff df 49 89 ff 48 8d 9f 58
RSP: 0018:ffffc90004587368 EFLAGS: 00000286
RAX: 5d71ed6d866e3900 RBX: ffff8880b8e3cd48 RCX: 5d71ed6d866e3900
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: ffffffff8b1c85a0
RBP: ffffc90004587590 R08: ffffffff911c153f R09: 1ffffffff22382a7
R10: dffffc0000000000 R11: fffffbfff22382a8 R12: dffffc0000000000
R13: ffff88802a3eda00 R14: dffffc0000000000 R15: ffff8880b8e3cd48
 __schedule+0x179f/0x45a0 kernel/sched/core.c:6704
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
RIP: 0010:preempt_count_add+0x6/0x1a0 kernel/sched/core.c:5836
Code: e1 07 80 c1 03 38 c1 7c 97 48 8b 3c 24 e8 42 c6 82 00 eb 8c e9 f5 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 80 84 2c 97 48 c1
RSP: 0018:ffffc90004587708 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 00007f15a879c42b RCX: 5d71ed6d866e3900
RDX: 0000000000000000 RSI: ffffffff8b1c8580 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff88802a3eda00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff8aa000d0
R13: 0000000000000000 R14: 0000000000000001 R15: 1ffff920008b0efe
 is_module_text_address+0x1b/0x130 kernel/module/main.c:3340
 kernel_text_address+0x8f/0xd0 kernel/extable.c:119
 __kernel_text_address+0xd/0x30 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1007 [inline]
 __kmalloc+0xb4/0x230 mm/slab_common.c:1020
 kmalloc include/linux/slab.h:604 [inline]
 tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x248/0x620 security/tomoyo/file.c:723
 security_file_ioctl+0x70/0xa0 security/security.c:2647
 __do_sys_ioctl fs/ioctl.c:865 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f15a879c42b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f15a959b050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f15a8a16128 RCX: 00007f15a879c42b
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d9
RBP: 0000000000000000 R08: 00007f15a959b6c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f15a8a16128 R14: 00007ffd1e5fa2a0 R15: 00007ffd1e5fa388
 </TASK>
----------------
Code disassembly (best guess):
   0:	5d                   	pop    %rbp
   1:	41 5e                	pop    %r14
   3:	41 5f                	pop    %r15
   5:	5d                   	pop    %rbp
   6:	c3                   	ret
   7:	e8 fb 35 26 09       	call   0x9263607
   c:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  13:	00 00 00
  16:	90                   	nop
  17:	41 57                	push   %r15
  19:	41 56                	push   %r14
  1b:	53                   	push   %rbx
  1c:	eb 11                	jmp    0x2f
  1e:	e8 34 df 2f 09       	call   0x92fdf57
  23:	e8 cf ae 2e 00       	call   0x2eaef7
  28:	fb                   	sti
  29:	5b                   	pop    %rbx
* 2a:	41 5e                	pop    %r14 <-- trapping instruction
  2c:	41 5f                	pop    %r15
  2e:	c3                   	ret
  2f:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  36:	fc ff df
  39:	49 89 ff             	mov    %rdi,%r15
  3c:	48                   	rex.W
  3d:	8d                   	.byte 0x8d
  3e:	9f                   	lahf
  3f:	58                   	pop    %rax