==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff888110e94c2a by task syz.3.6780/30409

CPU: 0 UID: 0 PID: 30409 Comm: syz.3.6780 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:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 db d0 02 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000b16f4f8 EFLAGS: 00000206
RAX: 1dd36bf32470d000 RBX: 0000000000000202 RCX: 1dd36bf32470d000
RDX: 0000000000000000 RSI: ffffffff8dba6163 RDI: ffffffff8be33300
RBP: ffff88801eeda7b0 R08: ffff88811c25c22b R09: 1ffff1102384b845
R10: dffffc0000000000 R11: ffffed102384b846 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88811c25c158 R15: ffff88801eed9cc0
 __mutex_unlock_slowpath+0xcc/0x760
 unix_stream_read_generic+0x14d4/0x2480
 unix_stream_recvmsg+0x15d/0x1b0
 sock_recvmsg+0x22c/0x270
 ____sys_recvmsg+0x1c9/0x460
 ___sys_recvmsg+0x1b5/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd91858ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd9167f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fd9187b6090 RCX: 00007fd91858ebe9
RDX: 0000000040002002 RSI: 0000200000000000 RDI: 0000000000000008
RBP: 00007fd918611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd9187b6128 R14: 00007fd9187b6090 R15: 00007ffe7b6550f8
 </TASK>

Allocated by task 30166:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 subflow_ulp_init+0xd0/0x5c0
 tcp_set_ulp+0x53c/0x5f0
 mptcp_subflow_create_socket+0x5c5/0xb40
 __mptcp_nmpc_sk+0x150/0x720
 mptcp_bind+0xab/0x1d0
 __sys_bind+0x2c6/0x3e0
 __x64_sys_bind+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 29543:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free_bulk+0x2d1/0x520
 kvfree_rcu_bulk+0xe5/0x1f0
 kfree_rcu_work+0xed/0x170
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/0x410
 tcp_cleanup_ulp+0x7c/0xf0
 tcp_v4_destroy_sock+0x273/0x5d0
 inet_csk_destroy_sock+0x166/0x3a0
 __tcp_close+0xb19/0xde0
 __mptcp_close_ssk+0x3d7/0xfd0
 mptcp_destroy_common+0x152/0x320
 mptcp_destroy+0x84/0x120
 __mptcp_destroy_sock+0x156/0x350
 __mptcp_close+0x76a/0xb00
 mptcp_close+0x28/0x1a0
 inet_release+0x144/0x190
 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 ffff888110e94c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888110e94c00, ffff888110e94e00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888110e94c00 pfn:0x110e94
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 ffffea00041c1210 ffffea0004454210
raw: ffff888110e94c00 000000000010000f 00000000f5000000 0000000000000000
head: 057ff00000000240 ffff88801a441c80 ffffea00041c1210 ffffea0004454210
head: ffff888110e94c00 000000000010000f 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000443a501 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 5840, tgid 5840 (syz-executor), ts 56023996223, free_ts 56018217258
 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
 inet6_addr_add+0x6b2/0xc00
 inet6_rtm_newaddr+0x93d/0xd20
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
page last free pid 1230 tgid 1230 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_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 rtmsg_ifinfo_build_skb+0x84/0x260
 rtmsg_ifinfo+0x8c/0x1a0
 netif_state_change+0x29e/0x3a0
 linkwatch_do_dev+0x117/0x170
 __linkwatch_run_queue+0x56a/0x7e0
 linkwatch_event+0x4c/0x60
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0

Memory state around the buggy address:
 ffff888110e94b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888110e94b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888110e94c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888110e94c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888110e94d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
