==================================================================
BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567

CPU: 1 PID: 7674 Comm: kworker/1:11 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events mptcp_worker
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report_invalid_free+0x81/0x190 mm/kasan/report.c:462
 ____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:356
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kfree+0xe2/0x580 mm/slub.c:4567
 tcp_disconnect+0x980/0x1e20 net/ipv4/tcp.c:3145
 __mptcp_close_ssk+0x5ca/0x7e0 net/mptcp/protocol.c:2327
 mptcp_do_fastclose net/mptcp/protocol.c:2592 [inline]
 mptcp_worker+0x78c/0xff0 net/mptcp/protocol.c:2627
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 10347:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:733 [inline]
 sctp_add_bind_addr+0x93/0x3d0 net/sctp/bind_addr.c:144
 sctp_copy_local_addr_list+0x325/0x4f0 net/sctp/protocol.c:165
 sctp_copy_one_addr net/sctp/bind_addr.c:460 [inline]
 sctp_bind_addr_copy+0xde/0x460 net/sctp/bind_addr.c:56
 sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1093
 __sctp_connect+0x3d0/0xc30 net/sctp/socket.c:1195
 __sctp_setsockopt_connectx+0x102/0x170 net/sctp/socket.c:1334
 sctp_getsockopt_connectx3 net/sctp/socket.c:1419 [inline]
 sctp_getsockopt+0x279d/0x6e90 net/sctp/socket.c:8108
 __sys_getsockopt+0x216/0x690 net/socket.c:2296
 __do_sys_getsockopt net/socket.c:2311 [inline]
 __se_sys_getsockopt net/socket.c:2308 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 6096:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kmem_cache_free_bulk.part.0+0x205/0x880 mm/slub.c:3665
 kfree_bulk include/linux/slab.h:456 [inline]
 kfree_rcu_work+0x56c/0xa60 kernel/rcu/tree.c:3038
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
 kvfree_call_rcu+0x74/0x8f0 kernel/rcu/tree.c:3341
 sctp_bind_addr_clean+0x135/0x1f0 net/sctp/bind_addr.c:125
 sctp_association_free+0x28c/0x7d0 net/sctp/associola.c:358
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x385c/0x4ec0 net/sctp/sm_sideeffect.c:1170
 sctp_assoc_bh_rcv+0x386/0x6c0 net/sctp/associola.c:1053
 sctp_inq_push+0x1d2/0x270 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x196/0x5a0 net/sctp/input.c:346
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x12f/0x3a0 net/core/sock.c:2906
 release_sock+0x54/0x1b0 net/core/sock.c:3462
 sctp_getsockopt+0x2c0/0x6e90 net/sctp/socket.c:8270
 __sys_getsockopt+0x216/0x690 net/socket.c:2296
 __do_sys_getsockopt net/socket.c:2311 [inline]
 __se_sys_getsockopt net/socket.c:2308 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
 kvfree_call_rcu+0x74/0x8f0 kernel/rcu/tree.c:3341
 sctp_bind_addr_clean+0x135/0x1f0 net/sctp/bind_addr.c:125
 sctp_association_free+0x28c/0x7d0 net/sctp/associola.c:358
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x385c/0x4ec0 net/sctp/sm_sideeffect.c:1170
 sctp_assoc_bh_rcv+0x386/0x6c0 net/sctp/associola.c:1053
 sctp_inq_push+0x1d2/0x270 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x196/0x5a0 net/sctp/input.c:346
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x12f/0x3a0 net/core/sock.c:2906
 release_sock+0x54/0x1b0 net/core/sock.c:3462
 sctp_getsockopt+0x2c0/0x6e90 net/sctp/socket.c:8270
 __sys_getsockopt+0x216/0x690 net/socket.c:2296
 __do_sys_getsockopt net/socket.c:2311 [inline]
 __se_sys_getsockopt net/socket.c:2308 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88801d8eeb00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff88801d8eeb00, ffff88801d8eeb40)

The buggy address belongs to the physical page:
page:ffffea0000763b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d8ee
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea000085abc0 dead000000000002 ffff888011841640
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 2, tgid 2 (kthreadd), ts 7646838819, free_ts 7168969483
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549
 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:1829 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x84f/0xe80 mm/slub.c:3036
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
 slab_alloc_node mm/slub.c:3214 [inline]
 __kmalloc_node+0x2e2/0x380 mm/slub.c:4473
 kmalloc_node include/linux/slab.h:623 [inline]
 __vmalloc_area_node mm/vmalloc.c:3012 [inline]
 __vmalloc_node_range+0xa36/0x13a0 mm/vmalloc.c:3196
 alloc_thread_stack_node kernel/fork.c:312 [inline]
 dup_task_struct kernel/fork.c:977 [inline]
 copy_process+0x156c/0x7090 kernel/fork.c:2085
 kernel_clone+0xe7/0xab0 kernel/fork.c:2671
 kernel_thread+0xb5/0xf0 kernel/fork.c:2724
 create_kthread kernel/kthread.c:399 [inline]
 kthreadd+0x4ea/0x750 kernel/kthread.c:745
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
 __vunmap+0x85d/0xd30 mm/vmalloc.c:2696
 free_work+0x58/0x70 mm/vmalloc.c:97
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Memory state around the buggy address:
 ffff88801d8eea00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff88801d8eea80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
>ffff88801d8eeb00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88801d8eeb80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
 ffff88801d8eec00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
==================================================================