==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff88810e18242a by task modprobe/18159

CPU: 1 UID: 0 PID: 18159 Comm: modprobe Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 rose_timer_expiry+0x471/0x4b0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:check_preemption_disabled+0x35/0x120
Code: 48 8b 05 be 6e 26 07 48 89 44 24 08 65 8b 05 c6 6e 26 07 65 8b 0d bb 6e 26 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 9b 6e 26 07 <48> 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9
RSP: 0018:ffffc9000437f3d8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff90db7501 RCX: b6809f4b61656b00
RDX: ffffc9000437f501 RSI: ffffffff8be33660 RDI: ffffffff8be33620
RBP: dffffc0000000000 R08: ffffc9000437ff48 R09: 0000000000000000
R10: ffffc9000437f5b8 R11: fffff5200086feb9 R12: ffffc9000437ff58
R13: ffffffff8172c195 R14: ffffffff8e139ee0 R15: ffffffff8172c195
 rcu_is_watching+0x15/0xb0
 lock_release+0x4b/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 alloc_empty_file+0x55/0x1d0
 path_openat+0x107/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7174210a46
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 0a 48 01 00 48 83 c8 ff c3 31
RSP: 002b:00007ffd22d0f1d8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffd22d0f438 RCX: 00007f7174210a46
RDX: 0000000000080000 RSI: 00007ffd22d0f250 RDI: 00000000ffffff9c
RBP: 00007ffd22d0f240 R08: 0000000000080000 R09: 00007ffd22d0f250
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffd22d0f250
R13: 0000000000000002 R14: 00007ffd22d0f41f R15: 00000000ffffffff
 </TASK>

Allocated by task 18013:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 __neigh_notify+0x15c/0x310
 __neigh_update+0x1d7f/0x25d0
 arp_req_set+0x404/0x620
 arp_ioctl+0x302/0x450
 inet_ioctl+0x36e/0x4c0
 sock_do_ioctl+0xdc/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 18013:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 skb_release_data+0x62d/0x7c0
 consume_skb+0x9e/0xf0
 netlink_broadcast_filtered+0x1188/0x12c0
 nlmsg_notify+0xf0/0x1a0
 __neigh_notify+0x1ae/0x310
 __neigh_update+0x1d7f/0x25d0
 arp_req_set+0x404/0x620
 arp_ioctl+0x302/0x450
 inet_ioctl+0x36e/0x4c0
 sock_do_ioctl+0xdc/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88810e182300
 which belongs to the cache skbuff_small_head of size 704
The buggy address is located 298 bytes inside of
 freed 704-byte region [ffff88810e182300, ffff88810e1825c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e180
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff888100aacb40 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000120012 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888100aacb40 dead000000000100 dead000000000122
head: 0000000000000000 0000000000120012 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea0004386001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 17120, tgid 17118 (syz.2.3328), ts 232523870930, free_ts 222610014626
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 kmem_cache_alloc_node_noprof+0x280/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 mpls_netconf_notify_devconf+0x46/0x100
 mpls_dev_sysctl_register+0x1d3/0x270
 mpls_dev_notify+0x357/0x7a0
 notifier_call_chain+0x1b6/0x3e0
 register_netdevice+0x1608/0x1ae0
 register_netdev+0x40/0x60
 ip6_tnl_init_net+0x259/0x3b0
page last free pid 5878 tgid 5878 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __folio_put+0x21b/0x2c0
 unpin_user_pages_dirty_lock+0x395/0x510
 xdp_umem_release+0xdc/0x220
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff88810e182300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810e182380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810e182400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88810e182480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810e182500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
