------------[ cut here ]------------
WARNING: CPU: 1 PID: 18 at net/core/skbuff.c:5285 skb_try_coalesce+0x1108/0x1440 net/core/skbuff.c:5285
Modules linked in:
CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_try_coalesce+0x1108/0x1440 net/core/skbuff.c:5285
Code: 37 00 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 b7 01 00 00 49 8b 85 c8 00 00 00 48 89 44 24 30 e9 fa f5 ff ff e8 38 9e 7b fa <0f> 0b e9 19 fa ff ff e8 ac 90 bf fa e9 8b f1 ff ff 48 8b 7c 24 28
RSP: 0018:ffffc90000d87528 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffffedc RCX: 0000000000000100
RDX: ffff888011613780 RSI: ffffffff86f7b938 RDI: 0000000000000003
RBP: ffff888023af2140 R08: 00000000fffffedc R09: 0000000000000000
R10: ffffffff86f7b34f R11: 0000000000000000 R12: 000000000000005c
R13: ffff888048ed9c68 R14: ffff88805c1186c0 R15: ffff888023af21be
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000051a230 CR3: 000000004c7ae000 CR4: 0000000000350ee0
Call Trace:
 tcp_try_coalesce net/ipv4/tcp_input.c:4600 [inline]
 tcp_try_coalesce+0x393/0x920 net/ipv4/tcp_input.c:4579
 tcp_queue_rcv+0x8a/0x6e0 net/ipv4/tcp_input.c:4863
 tcp_data_queue+0x150a/0x4b30 net/ipv4/tcp_input.c:4969
 tcp_rcv_established+0x841/0x1eb0 net/ipv4/tcp_input.c:5881
 tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1679
 tcp_v4_rcv+0x2d36/0x3780 net/ipv4/tcp_ipv4.c:2062
 ip_protocol_deliver_rcu+0x5c/0x8a0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:301 [inline]
 NF_HOOK include/linux/netfilter.h:295 [inline]
 ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:458 [inline]
 ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
 NF_HOOK include/linux/netfilter.h:301 [inline]
 NF_HOOK include/linux/netfilter.h:295 [inline]
 ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5365
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5479
 process_backlog+0x232/0x6c0 net/core/dev.c:6346
 __napi_poll+0xaf/0x440 net/core/dev.c:6892
 napi_poll net/core/dev.c:6959 [inline]
 net_rx_action+0x801/0xb40 net/core/dev.c:7036
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
 run_ksoftirqd kernel/softirq.c:652 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:644
 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294