general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 1 PID: 12011 Comm: syz-executor.3 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_end_pointer include/linux/skbuff.h:1419 [inline]
RIP: 0010:skb_has_frag_list include/linux/skbuff.h:3566 [inline]
RIP: 0010:kcm_sendmsg+0x18c1/0x2420 net/kcm/kcmsock.c:1069
Code: 00 e8 73 fb 70 f8 eb 05 e8 6c fb 70 f8 48 8b 5c 24 30 4c 8d bb c8 00 00 00 4d 89 fd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 ff e8 ef 1a b9 f8 48 89 d8 48 8b 9b
RSP: 0018:ffffc90001ebf8c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900102ea000 RSI: 00000000000009dc RDI: 00000000000009dd
RBP: ffffc90001ebfaf0 R08: ffffffff890e1d04 R09: fffffbfff204ddd3
R10: fffffbfff204ddd3 R11: 0000000000000000 R12: 00000000fffffe00
R13: 0000000000000019 R14: ffff8880816f9f84 R15: 00000000000000c8
FS:  00007f165633f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000021000000 CR3: 0000000022d9c000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2350
 ___sys_sendmsg net/socket.c:2404 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2433
 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
 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:00007f165633f188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000020000c40 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fffdfbc570f R14: 00007f165633f300 R15: 0000000000022000
Modules linked in:
---[ end trace 5fbbdc5ce1f7fcd1 ]---
RIP: 0010:skb_end_pointer include/linux/skbuff.h:1419 [inline]
RIP: 0010:skb_has_frag_list include/linux/skbuff.h:3566 [inline]
RIP: 0010:kcm_sendmsg+0x18c1/0x2420 net/kcm/kcmsock.c:1069
Code: 00 e8 73 fb 70 f8 eb 05 e8 6c fb 70 f8 48 8b 5c 24 30 4c 8d bb c8 00 00 00 4d 89 fd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 ff e8 ef 1a b9 f8 48 89 d8 48 8b 9b
RSP: 0018:ffffc90001ebf8c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900102ea000 RSI: 00000000000009dc RDI: 00000000000009dd
RBP: ffffc90001ebfaf0 R08: ffffffff890e1d04 R09: fffffbfff204ddd3
R10: fffffbfff204ddd3 R11: 0000000000000000 R12: 00000000fffffe00
R13: 0000000000000019 R14: ffff8880816f9f84 R15: 00000000000000c8
FS:  00007f165633f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000