syzbot

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ODEBUG: free active (active state 0) object: ffff88805d95f090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 0 PID: 13943 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 13943 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 0 PID: 13943 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 0 PID: 13943 Comm: syz.0.1749 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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 e0 a5 1c 8b 48 c7 c6 40 a2 1c 8b 48 c7 c2 60 a7 1c 8b 8b 0c 24 4d 89 f8 41 55 e8 6e 2a 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 03 e8 59
RSP: 0000:ffffc90000007a50 EFLAGS: 00010296
RAX: 1535045872a7bb00 RBX: ffffffff9752c400 RCX: ffff888024e18000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8accae60 R08: ffffffff911cd6df R09: 1ffffffff2239adb
R10: dffffc0000000000 R11: fffffbfff2239adc R12: ffff88805d95f200
R13: ffffffff897cc670 R14: ffff88805d95f000 R15: ffff88805d95f090
FS:  00007f8d04a206c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3041dff8 CR3: 0000000053e48000 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:console_flush_all+0x8b1/0xd20 arch/x86/include/asm/irqflags.h:-1
Code: ed 01 00 00 e8 f0 8a 1b 00 4d 85 ff 48 8b 5c 24 38 75 07 e8 e1 8a 1b 00 eb 06 e8 da 8a 1b 00 fb 49 bf 00 00 00 00 00 fc ff df <48> 8b 44 24 58 42 0f b6 04 38 84 c0 0f 85 2f 02 00 00 80 3b 01 0f
RSP: 0000:ffffc90003256800 EFLAGS: 00000287
RAX: ffffffff816ba0b6 RBX: ffffc9000325699f RCX: 0000000000080000
RDX: ffffc9000ea47000 RSI: 000000000007f1ea RDI: 000000000007f1eb
RBP: ffffc90003256970 R08: ffffffff911cd507 R09: 1ffffffff2239aa0
R10: dffffc0000000000 R11: fffffbfff2239aa1 R12: ffffffff8d8baa40
R13: 1ffffffff19f9724 R14: ffffffff8d8baa98 R15: dffffc0000000000
 console_unlock+0xad/0x350 kernel/printk/printk.c:3069
 vprintk_emit+0x497/0x610 kernel/printk/printk.c:2341
 _printk+0xde/0x130 kernel/printk/printk.c:2366
 batadv_check_known_mac_addr+0x2a7/0x3e0 net/batman-adv/hard-interface.c:528
 batadv_hardif_add_interface net/batman-adv/hard-interface.c:906 [inline]
 batadv_hard_if_event+0x10ac/0x15b0 net/batman-adv/hard-interface.c:970
 notifier_call_chain+0x197/0x380 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
 call_netdevice_notifiers net/core/dev.c:2091 [inline]
 register_netdevice+0x16a5/0x1bb0 net/core/dev.c:10351
 ipvlan_link_new+0x38b/0xa90 drivers/net/ipvlan/ipvlan_main.c:588
 rtnl_newlink_create net/core/rtnetlink.c:3521 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3741 [inline]
 rtnl_newlink+0x1542/0x20a0 net/core/rtnetlink.c:3754
 rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6476
 netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x5ba/0x960 net/socket.c:2594
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2648
 __sys_sendmsg net/socket.c:2677 [inline]
 __do_sys_sendmsg net/socket.c:2686 [inline]
 __se_sys_sendmsg+0x1c2/0x2b0 net/socket.c:2684
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8d03b9ce59
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:00007f8d04a20028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8d03e16090 RCX: 00007f8d03b9ce59
RDX: 0000000020008004 RSI: 00002000000002c0 RDI: 0000000000000009
RBP: 00007f8d03c32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8d03e16128 R14: 00007f8d03e16090 R15: 00007ffccc34f028
 </TASK>
----------------
Code disassembly (best guess):
   0:	ed                   	in     (%dx),%eax
   1:	01 00                	add    %eax,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	f0 8a 1b             	lock mov (%rbx),%bl
   8:	00 4d 85             	add    %cl,-0x7b(%rbp)
   b:	ff 48 8b             	decl   -0x75(%rax)
   e:	5c                   	pop    %rsp
   f:	24 38                	and    $0x38,%al
  11:	75 07                	jne    0x1a
  13:	e8 e1 8a 1b 00       	call   0x1b8af9
  18:	eb 06                	jmp    0x20
  1a:	e8 da 8a 1b 00       	call   0x1b8af9
  1f:	fb                   	sti
  20:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  27:	fc ff df
* 2a:	48 8b 44 24 58       	mov    0x58(%rsp),%rax <-- trapping instruction
  2f:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  34:	84 c0                	test   %al,%al
  36:	0f 85 2f 02 00 00    	jne    0x26b
  3c:	80 3b 01             	cmpb   $0x1,(%rbx)
  3f:	0f                   	.byte 0xf