tipc: Failed do clone local mcast rcv buffer
==================================================================
BUG: KASAN: use-after-free in __skb_unlink include/linux/skbuff.h:2048 [inline]
BUG: KASAN: use-after-free in __skb_dequeue include/linux/skbuff.h:2067 [inline]
BUG: KASAN: use-after-free in __skb_queue_purge include/linux/skbuff.h:2778 [inline]
BUG: KASAN: use-after-free in tipc_mcast_xmit+0x1026/0x16c0 net/tipc/bcast.c:421
Read of size 8 at addr ffff8881953c6000 by task syz-executor.3/14469

CPU: 1 PID: 14469 Comm: syz-executor.3 Not tainted 5.4.72-syzkaller-00299-gb34934d40c49 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b0/0x21e lib/dump_stack.c:118
 print_address_description+0x96/0x5d0 mm/kasan/report.c:374
 __kasan_report+0x14b/0x1c0 mm/kasan/report.c:506
 kasan_report+0x27/0x50 mm/kasan/common.c:634
 __skb_unlink include/linux/skbuff.h:2048 [inline]
 __skb_dequeue include/linux/skbuff.h:2067 [inline]
 __skb_queue_purge include/linux/skbuff.h:2778 [inline]
 tipc_mcast_xmit+0x1026/0x16c0 net/tipc/bcast.c:421
 tipc_sendmcast+0xc00/0xeb0 net/tipc/socket.c:830
 __tipc_sendmsg+0x120d/0x2d30 net/tipc/socket.c:1368
 tipc_sendmsg+0x51/0x70 net/tipc/socket.c:1301
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 kernel_sendmsg+0xe2/0x120 net/socket.c:678
 sock_no_sendpage+0x13f/0x1b0 net/core/sock.c:2768
 kernel_sendpage net/socket.c:3764 [inline]
 sock_sendpage+0xd0/0x120 net/socket.c:936
 pipe_to_sendpage+0x23b/0x300 fs/splice.c:449
 splice_from_pipe_feed fs/splice.c:500 [inline]
 __splice_from_pipe+0x2d3/0x870 fs/splice.c:624
 splice_from_pipe fs/splice.c:659 [inline]
 generic_splice_sendpage+0x172/0x200 fs/splice.c:829
 splice_direct_to_actor+0x496/0xb00 fs/splice.c:976
 do_splice_direct+0x279/0x3d0 fs/splice.c:1064
 do_sendfile+0x89d/0x1110 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1ae/0x220 fs/read_write.c:1511
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0817543c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000027ec0 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007f0817543ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200fc0 R11: 0000000000000246 R12: 0000000000000027
R13: 00007fff032cae4f R14: 00007f08175449c0 R15: 000000000118bf2c

Allocated by task 14469:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc+0x117/0x1b0 mm/kasan/common.c:510
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2803 [inline]
 slab_alloc mm/slub.c:2811 [inline]
 kmem_cache_alloc+0x1d5/0x250 mm/slub.c:2816
 kmem_cache_alloc_node include/linux/slab.h:427 [inline]
 __alloc_skb+0x88/0x4d0 net/core/skbuff.c:198
 alloc_skb_fclone include/linux/skbuff.h:1107 [inline]
 tipc_buf_acquire net/tipc/msg.c:66 [inline]
 tipc_msg_build+0x74a/0x1b20 net/tipc/msg.c:368
 tipc_sendmcast+0x92a/0xeb0 net/tipc/socket.c:824
 __tipc_sendmsg+0x120d/0x2d30 net/tipc/socket.c:1368
 tipc_sendmsg+0x51/0x70 net/tipc/socket.c:1301
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 kernel_sendmsg+0xe2/0x120 net/socket.c:678
 sock_no_sendpage+0x13f/0x1b0 net/core/sock.c:2768
 kernel_sendpage net/socket.c:3764 [inline]
 sock_sendpage+0xd0/0x120 net/socket.c:936
 pipe_to_sendpage+0x23b/0x300 fs/splice.c:449
 splice_from_pipe_feed fs/splice.c:500 [inline]
 __splice_from_pipe+0x2d3/0x870 fs/splice.c:624
 splice_from_pipe fs/splice.c:659 [inline]
 generic_splice_sendpage+0x172/0x200 fs/splice.c:829
 splice_direct_to_actor+0x496/0xb00 fs/splice.c:976
 do_splice_direct+0x279/0x3d0 fs/splice.c:1064
 do_sendfile+0x89d/0x1110 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1ae/0x220 fs/read_write.c:1511
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 14469:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x168/0x220 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1453 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1486
 slab_free mm/slub.c:3051 [inline]
 kmem_cache_free+0xac/0x5c0 mm/slub.c:3067
 tipc_buf_append+0x2d1/0xad0 net/tipc/msg.c:188
 tipc_msg_reassemble+0x331/0x590 net/tipc/msg.c:726
 tipc_mcast_xmit+0x223/0x16c0 net/tipc/bcast.c:385
 tipc_sendmcast+0xc00/0xeb0 net/tipc/socket.c:830
 __tipc_sendmsg+0x120d/0x2d30 net/tipc/socket.c:1368
 tipc_sendmsg+0x51/0x70 net/tipc/socket.c:1301
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 kernel_sendmsg+0xe2/0x120 net/socket.c:678
 sock_no_sendpage+0x13f/0x1b0 net/core/sock.c:2768
 kernel_sendpage net/socket.c:3764 [inline]
 sock_sendpage+0xd0/0x120 net/socket.c:936
 pipe_to_sendpage+0x23b/0x300 fs/splice.c:449
 splice_from_pipe_feed fs/splice.c:500 [inline]
 __splice_from_pipe+0x2d3/0x870 fs/splice.c:624
 splice_from_pipe fs/splice.c:659 [inline]
 generic_splice_sendpage+0x172/0x200 fs/splice.c:829
 splice_direct_to_actor+0x496/0xb00 fs/splice.c:976
 do_splice_direct+0x279/0x3d0 fs/splice.c:1064
 do_sendfile+0x89d/0x1110 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1ae/0x220 fs/read_write.c:1511
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881953c6000
 which belongs to the cache skbuff_fclone_cache of size 488
The buggy address is located 0 bytes inside of
 488-byte region [ffff8881953c6000, ffff8881953c61e8)
The buggy address belongs to the page:
page:ffffea000654f180 refcount:1 mapcount:0 mapping:ffff8881daa92f00 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 ffffea0007250c80 0000000400000004 ffff8881daa92f00
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881953c5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881953c5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881953c6000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881953c6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881953c6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3051 [inline]
BUG: KASAN: double-free or invalid-free in kmem_cache_free+0xac/0x5c0 mm/slub.c:3067

CPU: 1 PID: 14469 Comm: syz-executor.3 Tainted: G    B             5.4.72-syzkaller-00299-gb34934d40c49 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b0/0x21e lib/dump_stack.c:118
 print_address_description+0x96/0x5d0 mm/kasan/report.c:374
 kasan_report_invalid_free+0x54/0xc0 mm/kasan/report.c:468
 __kasan_slab_free+0x102/0x220 mm/kasan/common.c:459
 slab_free_hook mm/slub.c:1453 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1486
 slab_free mm/slub.c:3051 [inline]
 kmem_cache_free+0xac/0x5c0 mm/slub.c:3067
 __skb_queue_purge include/linux/skbuff.h:2779 [inline]
 tipc_mcast_xmit+0x10a8/0x16c0 net/tipc/bcast.c:421
 tipc_sendmcast+0xc00/0xeb0 net/tipc/socket.c:830
 __tipc_sendmsg+0x120d/0x2d30 net/tipc/socket.c:1368
 tipc_sendmsg+0x51/0x70 net/tipc/socket.c:1301
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 kernel_sendmsg+0xe2/0x120 net/socket.c:678
 sock_no_sendpage+0x13f/0x1b0 net/core/sock.c:2768
 kernel_sendpage net/socket.c:3764 [inline]
 sock_sendpage+0xd0/0x120 net/socket.c:936
 pipe_to_sendpage+0x23b/0x300 fs/splice.c:449
 splice_from_pipe_feed fs/splice.c:500 [inline]
 __splice_from_pipe+0x2d3/0x870 fs/splice.c:624
 splice_from_pipe fs/splice.c:659 [inline]
 generic_splice_sendpage+0x172/0x200 fs/splice.c:829
 splice_direct_to_actor+0x496/0xb00 fs/splice.c:976
 do_splice_direct+0x279/0x3d0 fs/splice.c:1064
 do_sendfile+0x89d/0x1110 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1ae/0x220 fs/read_write.c:1511
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0817543c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000027ec0 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007f0817543ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200fc0 R11: 0000000000000246 R12: 0000000000000027
R13: 00007fff032cae4f R14: 00007f08175449c0 R15: 000000000118bf2c

Allocated by task 14479:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc+0x117/0x1b0 mm/kasan/common.c:510
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2803 [inline]
 slab_alloc mm/slub.c:2811 [inline]
 kmem_cache_alloc+0x1d5/0x250 mm/slub.c:2816
 skb_clone+0x1b2/0x370 net/core/skbuff.c:1450
 pfkey_broadcast_one+0x98/0x340 net/key/af_key.c:203
 pfkey_broadcast+0x1c5/0x320 net/key/af_key.c:258
 pfkey_send_policy_notify+0x837/0xc10 net/key/af_key.c:2238
 km_policy_notify+0x86/0xe0 net/xfrm/xfrm_state.c:2159
 pfkey_spdadd+0xebd/0x16f0 net/key/af_key.c:2348
 pfkey_process net/key/af_key.c:2841 [inline]
 pfkey_sendmsg+0xaa9/0xef0 net/key/af_key.c:3680
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x56f/0x860 net/socket.c:2298
 ___sys_sendmsg net/socket.c:2352 [inline]
 __sys_sendmsg+0x26a/0x350 net/socket.c:2398
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 14464:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x168/0x220 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1453 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1486
 slab_free mm/slub.c:3051 [inline]
 kmem_cache_free+0xac/0x5c0 mm/slub.c:3067
 skb_queue_purge+0x138/0x200 net/core/skbuff.c:3080
 pfkey_sock_destruct+0x15d/0x290 net/key/af_key.c:100
 __sk_destruct+0x50/0x480 net/core/sock.c:1698
 sock_put include/net/sock.h:1749 [inline]
 pfkey_release+0x276/0x2b0 net/key/af_key.c:190
 __sock_release net/socket.c:591 [inline]
 sock_close+0xd2/0x250 net/socket.c:1269
 __fput+0x27d/0x6c0 fs/file_table.c:280
 task_work_run+0x176/0x1a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x286/0x2e0 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881707cb000
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 0 bytes inside of
 240-byte region [ffff8881707cb000, ffff8881707cb0f0)
The buggy address belongs to the page:
page:ffffea0005c1f2c0 refcount:1 mapcount:0 mapping:ffff8881daa92500 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea0007501480 0000000900000009 ffff8881daa92500
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881707caf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881707caf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881707cb000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881707cb080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
 ffff8881707cb100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
==================================================================