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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff888111f47c2a by task modprobe/24982

CPU: 1 UID: 0 PID: 24982 Comm: modprobe Not tainted 6.16.0-syzkaller-12063-g37816488247d-dirty #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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 ab 06 4c f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f3 ad 14 f6 65 8b 05 6c a1 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90002b2fc20 EFLAGS: 00000206
RAX: a3557f237cd23c00 RBX: 0000000000000a06 RCX: a3557f237cd23c00
RDX: 0000000000000000 RSI: ffffffff8d9b4b89 RDI: 0000000000000001
RBP: ffffc90002b2fca0 R08: ffffffff8fa34937 R09: 1ffffffff1f46926
R10: dffffc0000000000 R11: fffffbfff1f46927 R12: dffffc0000000000
R13: ffff88806ca56500 R14: ffffffff99d119a8 R15: 1ffff92000565f84
 debug_check_no_obj_freed+0x451/0x470
 kmem_cache_free+0x113/0x400
 do_sys_openat2+0x154/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f667f9a2a46
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:00007ffddeb4c988 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffddeb4cbe8 RCX: 00007f667f9a2a46
RDX: 0000000000080000 RSI: 00007ffddeb4ca00 RDI: 00000000ffffff9c
RBP: 00007ffddeb4c9f0 R08: 0000000000080000 R09: 00007ffddeb4ca00
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffddeb4ca00
R13: 0000000000000003 R14: 00007ffddeb4cbcf R15: 00000000ffffffff
 </TASK>

Allocated by task 24571:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 tipc_sub_subscribe+0x118/0x690
 tipc_conn_rcv_sub+0x136/0x350
 tipc_topsrv_kern_subscr+0x17b/0x240
 tipc_group_create+0x364/0x500
 tipc_sk_join+0x24d/0x6b0
 tipc_setsockopt+0x735/0x970
 do_sock_setsockopt+0x17c/0x1b0
 __x64_sys_setsockopt+0x13f/0x1b0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 24570:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 tipc_topsrv_kern_unsubscr+0x12c/0x1a0
 tipc_group_delete+0x40c/0x480
 tipc_sk_leave+0x138/0x4e0
 tipc_release+0x5fc/0x2160
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888111f47c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888111f47c00, ffff888111f47e00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888111f47800 pfn:0x111f44
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000240(workingset|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000240 ffff88801a441c80 ffffea000499eb10 ffffea00043bcc10
raw: ffff888111f47800 000000000010000b 00000000f5000000 0000000000000000
head: 057ff00000000240 ffff88801a441c80 ffffea000499eb10 ffffea00043bcc10
head: ffff888111f47800 000000000010000b 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000447d101 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 5844, tgid 5844 (syz-executor), ts 57877063428, free_ts 57805119690
 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
 __kmalloc_noprof+0x305/0x4f0
 fib6_info_alloc+0x30/0xf0
 ip6_route_info_create+0x142/0x860
 ip6_route_add+0x49/0x1b0
 addrconf_add_dev+0x24f/0x340
 inet6_addr_add+0x1a1/0xc00
 inet6_rtm_newaddr+0x93d/0xd20
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
page last free pid 5905 tgid 5905 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 vm_area_alloc+0x24/0x140
 mmap_region+0xdc7/0x20c0
 do_mmap+0xc45/0x10d0
 vm_mmap_pgoff+0x2a6/0x4d0
 ksys_mmap_pgoff+0x51f/0x760
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888111f47b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888111f47b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888111f47c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888111f47c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888111f47d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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