kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7864 Comm: syz-executor546 Not tainted 5.4.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__write_once_size include/linux/compiler.h:226 [inline]
RIP: 0010:__skb_unlink include/linux/skbuff.h:2024 [inline]
RIP: 0010:skb_unlink+0xa1/0x110 net/core/skbuff.c:3165
Code: 80 3c 30 00 74 05 e8 6e 74 d6 fb 49 8b 5c 24 08 4d 8d 6f 08 ba 10 00 00 00 4c 89 e7 31 f6 e8 d6 45 d6 fb 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ef e8 e0 74 d6 fb 49 89 5f 08 48 89 d8
RSP: 0018:ffff88808d5ffac0 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8880a41cf090
RBP: ffff88808d5ffaf8 R08: dffffc0000000000 R09: ffff8880a41cf080
R10: ffffed1014839e12 R11: 0000000000000000 R12: ffff8880a41cf080
R13: 0000000000000008 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007efeff2bc700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000209ff000 CR3: 0000000099267000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kcm_recvmsg+0x312/0x510 net/kcm/kcmsock.c:1161
 sock_recvmsg_nosec+0x8a/0xa0 net/socket.c:871
 ___sys_recvmsg+0x5af/0x910 net/socket.c:2480
 do_recvmmsg+0x2ca/0x7c0 net/socket.c:2601
 __sys_recvmmsg net/socket.c:2680 [inline]
 __do_sys_recvmmsg net/socket.c:2703 [inline]
 __se_sys_recvmmsg net/socket.c:2696 [inline]
 __x64_sys_recvmmsg+0x130/0x1c0 net/socket.c:2696
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446a39
Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007efeff2bbd98 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446a39
RDX: 0400000000000310 RSI: 0000000020003540 RDI: 0000000000000005
RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c
R13: 00000000002b0095 R14: 0000a50000000000 R15: 0000000300000018
Modules linked in:
---[ end trace b917cb5253b5b0db ]---
RIP: 0010:__write_once_size include/linux/compiler.h:226 [inline]
RIP: 0010:__skb_unlink include/linux/skbuff.h:2024 [inline]
RIP: 0010:skb_unlink+0xa1/0x110 net/core/skbuff.c:3165
Code: 80 3c 30 00 74 05 e8 6e 74 d6 fb 49 8b 5c 24 08 4d 8d 6f 08 ba 10 00 00 00 4c 89 e7 31 f6 e8 d6 45 d6 fb 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ef e8 e0 74 d6 fb 49 89 5f 08 48 89 d8
RSP: 0018:ffff88808d5ffac0 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8880a41cf090
RBP: ffff88808d5ffaf8 R08: dffffc0000000000 R09: ffff8880a41cf080
R10: ffffed1014839e12 R11: 0000000000000000 R12: ffff8880a41cf080
R13: 0000000000000008 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007efeff2bc700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000209ff000 CR3: 0000000099267000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400