------------[ cut here ]------------
kmalloc_reserve: request size 2147480000 exceeds KMALLOC_MAX_SIZE (4194304)
WARNING: CPU: 0 PID: 5990 at net/core/skbuff.c:598 kmalloc_reserve+0x2df/0x2f0 net/core/skbuff.c:596
Modules linked in:
CPU: 0 UID: 0 PID: 5990 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kmalloc_reserve+0x2df/0x2f0 net/core/skbuff.c:596
Code: ff e8 d5 4a 64 f8 c6 05 67 27 32 06 01 90 b9 00 00 40 00 48 c7 c7 a0 0b 94 8c 48 c7 c6 49 5a 96 8d 4c 89 ea e8 82 e7 27 f8 90 <0f> 0b 90 90 45 31 e4 e9 37 ff ff ff 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90002c3f798 EFLAGS: 00010246
RAX: 6aef4e9a5451c800 RBX: dffffc0000000001 RCX: ffff8881079a5640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90002c3f7e4 R08: ffff88804b024253 R09: 1ffff1100960484a
R10: dffffc0000000000 R11: ffffed100960484b R12: 000000007ffff080
R13: 000000007ffff1c0 R14: 0000000000000cc0 R15: 1ffff92000587efc
FS:  00005555874d6500(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006038 CR3: 000000010b696000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:677
 alloc_skb include/linux/skbuff.h:1377 [inline]
 sock_wmalloc+0xb2/0x130 net/core/sock.c:2798
 pppol2tp_sendmsg+0x183/0x5f0 net/l2tp/l2tp_ppp.c:275
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 ____sys_sendmsg+0x52d/0x830 net/socket.c:2614
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
 __sys_sendmmsg+0x227/0x430 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f45f258eba9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda5a883d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f45f27d5fa0 RCX: 00007f45f258eba9
RDX: 04000000000001ce RSI: 0000200000005f80 RDI: 0000000000000004
RBP: 00007f45f2611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f45f27d5fa0 R14: 00007f45f27d5fa0 R15: 0000000000000004
 </TASK>