general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 10329 Comm: syz-executor.1 Not tainted 5.14.0-rc1-next-20210715-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__skb_unlink include/linux/skbuff.h:2093 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2109 [inline]
RIP: 0010:skb_dequeue+0xf1/0x180 net/core/skbuff.c:3145
Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90009e47a18 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88803232c5b0 RCX: ffffc9000b8dc000
RDX: 0000000000000001 RSI: ffffffff8711f5e9 RDI: 0000000000000008
RBP: 0000000000000212 R08: 0000000000000001 R09: 0000000000000003
R10: fffff520013c8f31 R11: 0000000000000000 R12: ffff8880001e5140
R13: ffff88803232c5c8 R14: 0000000000000000 R15: 0000000000008000
FS:  00007fd013063700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 00000000ad406000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sctp_queue_purge_ulpevents+0xbd/0xf0 net/sctp/ulpevent.c:1180
 sctp_close+0x130/0x930 net/sctp/socket.c:1497
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
 __sock_release+0xcd/0x280 net/socket.c:648
 sock_close+0x18/0x20 net/socket.c:1300
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 get_signal+0x1b35/0x2160 kernel/signal.c:2581
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd013063188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000034000 RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000034000 RSI: 0000000020847fff RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 000000002005ffe4 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc99e39bdf R14: 00007fd013063300 R15: 0000000000022000
Modules linked in:
---[ end trace 16025be917e0097b ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:2093 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:2109 [inline]
RIP: 0010:skb_dequeue+0xf1/0x180 net/core/skbuff.c:3145
Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90009e47a18 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88803232c5b0 RCX: ffffc9000b8dc000
RDX: 0000000000000001 RSI: ffffffff8711f5e9 RDI: 0000000000000008
RBP: 0000000000000212 R08: 0000000000000001 R09: 0000000000000003
R10: fffff520013c8f31 R11: 0000000000000000 R12: ffff8880001e5140
R13: ffff88803232c5c8 R14: 0000000000000000 R15: 0000000000008000
FS:  00007fd013063700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 00000000ad406000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400