==================================================================
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: 0 PID: 143 Comm: kworker/0:2 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #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 359:
 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_array include/linux/slab.h:640 [inline]
 kcalloc include/linux/slab.h:671 [inline]
 tcp_cdg_init+0x10d/0x170 net/ipv4/tcp_cdg.c:380
 tcp_init_congestion_control+0xab/0x550 net/ipv4/tcp_cong.c:193
 tcp_init_transfer+0xccf/0xf00 net/ipv4/tcp_input.c:6045
 tcp_finish_connect+0x1cc/0x610 net/ipv4/tcp_input.c:6063
 tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6285 [inline]
 tcp_rcv_state_process+0xcb9/0x4990 net/ipv4/tcp_input.c:6488
 tcp_v6_do_rcv+0x3fc/0x13c0 net/ipv6/tcp_ipv6.c:1525
 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
 inet_wait_for_connect net/ipv4/af_inet.c:593 [inline]
 __inet_stream_connect+0x753/0xec0 net/ipv4/af_inet.c:685
 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:724
 mptcp_stream_connect+0x1d3/0xb60 net/mptcp/protocol.c:3622
 __sys_connect_file+0x14f/0x190 net/socket.c:1976
 __sys_connect+0x161/0x190 net/socket.c:1993
 __do_sys_connect net/socket.c:2003 [inline]
 __se_sys_connect net/socket.c:2000 [inline]
 __ia32_sys_connect+0x6e/0xb0 net/socket.c:2000
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Freed by task 32319:
 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]
 kfree+0xe2/0x580 mm/slub.c:4567
 tcp_cleanup_congestion_control+0x70/0x120 net/ipv4/tcp_cong.c:226
 tcp_v4_destroy_sock+0xdd/0x750 net/ipv4/tcp_ipv4.c:2254
 tcp_v6_destroy_sock+0x11/0x20 net/ipv6/tcp_ipv6.c:1969
 inet_csk_destroy_sock+0x196/0x440 net/ipv4/inet_connection_sock.c:1157
 tcp_done+0x23b/0x340 net/ipv4/tcp.c:4649
 tcp_rcv_state_process+0x3fc8/0x4990 net/ipv4/tcp_input.c:6607
 tcp_v6_do_rcv+0x3fc/0x13c0 net/ipv6/tcp_ipv6.c:1525
 tcp_v6_rcv+0x2e8e/0x3830 net/ipv6/tcp_ipv6.c:1759
 ip6_protocol_deliver_rcu+0x2db/0x1950 net/ipv6/ip6_input.c:439
 ip6_input_finish+0x14c/0x2c0 net/ipv6/ip6_input.c:484
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:493
 dst_input include/net/dst.h:455 [inline]
 ip6_rcv_finish+0x193/0x2c0 net/ipv6/ip6_input.c:79
 ip_sabotage_in net/bridge/br_netfilter_hooks.c:874 [inline]
 ip_sabotage_in+0x1fa/0x260 net/bridge/br_netfilter_hooks.c:865
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xc5/0x1f0 net/netfilter/core.c:614
 nf_hook.constprop.0+0x3ac/0x650 include/linux/netfilter.h:257
 NF_HOOK include/linux/netfilter.h:300 [inline]
 ipv6_rcv+0x9e/0x380 net/ipv6/ip6_input.c:309
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5485
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599
 netif_receive_skb_internal net/core/dev.c:5685 [inline]
 netif_receive_skb+0x12f/0x8d0 net/core/dev.c:5744
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 br_pass_frame_up+0x303/0x410 net/bridge/br_input.c:68
 br_handle_frame_finish+0x909/0x1aa0 net/bridge/br_input.c:199
 br_nf_hook_thresh+0x2f8/0x3d0 net/bridge/br_netfilter_hooks.c:1041
 br_nf_pre_routing_finish_ipv6+0x695/0xef0 net/bridge/br_netfilter_ipv6.c:207
 NF_HOOK include/linux/netfilter.h:302 [inline]
 br_nf_pre_routing_ipv6+0x417/0x7c0 net/bridge/br_netfilter_ipv6.c:237
 br_nf_pre_routing+0x1496/0x1fe0 net/bridge/br_netfilter_hooks.c:507
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:255 [inline]
 br_handle_frame+0x9c9/0x12d0 net/bridge/br_input.c:399
 __netif_receive_skb_core+0x9fe/0x38f0 net/core/dev.c:5379
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5483
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599
 process_backlog+0x3a0/0x7c0 net/core/dev.c:5927
 __napi_poll+0xb3/0x6d0 net/core/dev.c:6494
 napi_poll net/core/dev.c:6561 [inline]
 net_rx_action+0x9c1/0xd90 net/core/dev.c:6672
 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571

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_wait_for_connect+0x416/0x5c0 net/sctp/socket.c:9310
 __sctp_connect+0x9a1/0xc30 net/sctp/socket.c:1245
 sctp_connect net/sctp/socket.c:4805 [inline]
 sctp_inet_connect+0x15d/0x200 net/sctp/socket.c:4820
 __sys_connect_file+0x14f/0x190 net/socket.c:1976
 __sys_connect+0x161/0x190 net/socket.c:1993
 __do_sys_connect net/socket.c:2003 [inline]
 __se_sys_connect net/socket.c:2000 [inline]
 __ia32_sys_connect+0x6e/0xb0 net/socket.c:2000
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

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_wait_for_connect+0x416/0x5c0 net/sctp/socket.c:9310
 __sctp_connect+0x9a1/0xc30 net/sctp/socket.c:1245
 sctp_connect net/sctp/socket.c:4805 [inline]
 sctp_inet_connect+0x15d/0x200 net/sctp/socket.c:4820
 __sys_connect_file+0x14f/0x190 net/socket.c:1976
 __sys_connect+0x161/0x190 net/socket.c:1993
 __do_sys_connect net/socket.c:2003 [inline]
 __se_sys_connect net/socket.c:2000 [inline]
 __ia32_sys_connect+0x6e/0xb0 net/socket.c:2000
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

The buggy address belongs to the object at ffff888073bc3000
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff888073bc3000, ffff888073bc3040)

The buggy address belongs to the physical page:
page:ffffea0001cef0c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73bc3
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00005c5cc0 dead000000000005 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 3654, tgid 3654 (syz-executor.5), ts 194737846276, free_ts 194711191147
 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]
 slab_alloc mm/slub.c:3256 [inline]
 kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287
 kmalloc include/linux/slab.h:600 [inline]
 get_mountpoint+0x140/0x400 fs/namespace.c:794
 attach_recursive_mnt+0x151/0x1060 fs/namespace.c:2214
 graft_tree+0x187/0x210 fs/namespace.c:2337
 do_loopback fs/namespace.c:2452 [inline]
 path_mount+0x19ac/0x1e20 fs/namespace.c:3364
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3568
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
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
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2553
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3248 [inline]
 kmem_cache_alloc_node+0x2b1/0x3f0 mm/slub.c:3298
 __alloc_skb+0x210/0x2f0 net/core/skbuff.c:497
 alloc_skb include/linux/skbuff.h:1265 [inline]
 alloc_skb_with_frags+0x93/0x6c0 net/core/skbuff.c:6124
 sock_alloc_send_pskb+0x7a3/0x930 net/core/sock.c:2719
 sock_alloc_send_skb include/net/sock.h:1884 [inline]
 mld_newpack.isra.0+0x1b9/0x770 net/ipv6/mcast.c:1748
 add_grhead+0x295/0x340 net/ipv6/mcast.c:1851
 add_grec+0x1082/0x1560 net/ipv6/mcast.c:1989
 mld_send_initial_cr.part.0+0xf6/0x230 net/ipv6/mcast.c:2236
 mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
 mld_dad_work+0x1d3/0x690 net/ipv6/mcast.c:2262
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289

Memory state around the buggy address:
 ffff888073bc2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888073bc2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888073bc3000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff888073bc3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
 ffff888073bc3100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================