syzbot

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ODEBUG: free active (active state 0) object: ffff888024f68890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 0 PID: 6119 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 6119 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 0 PID: 6119 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 0 PID: 6119 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 40 79 fc 8a 48 c7 c6 a0 75 fc 8a 48 c7 c2 c0 7a fc 8a 8b 0c 24 4d 89 f8 41 55 e8 3e b9 29 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 43 02 24
RSP: 0018:ffffc90000007a50 EFLAGS: 00010296
RAX: 5d8916d5d1296000 RBX: ffffffff970a6a48 RCX: ffff88802ace1e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9f00 R08: ffffc90000007647 R09: 1ffff92000000ec8
R10: dffffc0000000000 R11: fffff52000000ec9 R12: ffff888024f68a00
R13: ffffffff89603730 R14: ffff888024f68000 R15: ffff888024f68890
FS:  00007fcacef86880(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcacef82000 CR3: 0000000024e7c000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1f0 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+0x16e/0x530 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x52d/0x7d0 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+0xc7/0x190 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:ma_pivots lib/maple_tree.c:656 [inline]
RIP: 0010:mas_data_end lib/maple_tree.c:1474 [inline]
RIP: 0010:mt_validate_nulls lib/maple_tree.c:7190 [inline]
RIP: 0010:mt_validate+0x4052/0x4530 lib/maple_tree.c:7237
Code: 04 08 84 c0 0f 84 46 01 00 00 44 89 f9 80 e1 07 38 c1 0f 8c 38 01 00 00 4c 89 ff e8 08 b1 87 f7 e9 2b 01 00 00 e8 6e 43 30 f7 <49> 8d 46 08 48 89 44 24 20 eb 0e e8 5e 43 30 f7 48 c7 44 24 20 00
RSP: 0018:ffffc9000be676c0 EFLAGS: 00000293
RAX: ffffffff8a554d52 RBX: 0000000000000000 RCX: ffff88802ace1e00
RDX: 0000000000000000 RSI: ffffffff8e320ef0 RDI: 0000000000000001
RBP: ffffc9000be67890 R08: ffff88802ace1e00 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888076be3400
R13: ffff888052e23880 R14: ffff888052e23800 R15: 0000000000000001
 validate_mm+0xb1/0x420 mm/mmap.c:288
 __split_vma+0xa2e/0xc00 mm/mmap.c:2425
 do_vmi_align_munmap+0x2dc/0x1660 mm/mmap.c:2501
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2660
 __vm_munmap+0x193/0x3c0 mm/mmap.c:2961
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2975 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2975
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcace91e097
Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffeacf08618 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000056113f0ca460 RCX: 00007fcace91e097
RDX: 000056113f0ca4a8 RSI: 0000000000000200 RDI: 00007fcacef74000
RBP: 0000000000000010 R08: 0000000000000040 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000246 R12: 000056113f0b20b0
R13: 00007fcacf0ad39c R14: 0000000000002000 R15: 0000000000000009
 </TASK>
----------------
Code disassembly (best guess):
   0:	04 08                	add    $0x8,%al
   2:	84 c0                	test   %al,%al
   4:	0f 84 46 01 00 00    	je     0x150
   a:	44 89 f9             	mov    %r15d,%ecx
   d:	80 e1 07             	and    $0x7,%cl
  10:	38 c1                	cmp    %al,%cl
  12:	0f 8c 38 01 00 00    	jl     0x150
  18:	4c 89 ff             	mov    %r15,%rdi
  1b:	e8 08 b1 87 f7       	call   0xf787b128
  20:	e9 2b 01 00 00       	jmp    0x150
  25:	e8 6e 43 30 f7       	call   0xf7304398
* 2a:	49 8d 46 08          	lea    0x8(%r14),%rax <-- trapping instruction
  2e:	48 89 44 24 20       	mov    %rax,0x20(%rsp)
  33:	eb 0e                	jmp    0x43
  35:	e8 5e 43 30 f7       	call   0xf7304398
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	44 24 20             	rex.R and $0x20,%al