------------[ cut here ]------------
WARNING: CPU: 1 PID: 10297 at net/core/skbuff.c:5287 skb_try_coalesce+0xf4a/0x1510 net/core/skbuff.c:5287
Modules linked in:
CPU: 0 PID: 10297 Comm: syz-executor.0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_try_coalesce+0xf4a/0x1510 net/core/skbuff.c:5287
Code: 32 fa e9 6c f1 ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 42 f2 ff ff 4c 89 ef e8 00 d6 32 fa e9 35 f2 ff ff e8 66 ff ee f9 <0f> 0b e9 a0 fb ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c aa f1 ff
RSP: 0018:ffffc9000b927478 EFLAGS: 00010293
RAX: ffffffff878a0e9a RBX: 00000000000000e8 RCX: ffff88801775d4c0
RDX: 0000000000000000 RSI: 00000000000000e8 RDI: 00000000ffffff68
RBP: 0000000000000001 R08: ffffffff878a0a33 R09: ffffed10036621ba
R10: ffffed10036621ba R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88802ac57574 R14: 00000000ffffff68 R15: ffffc9000b9275c4
FS:  00007f979c2a1700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000542978 CR3: 000000002399d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tcp_try_coalesce+0x2a3/0x8a0 net/ipv4/tcp_input.c:4600
 tcp_queue_rcv net/ipv4/tcp_input.c:4863 [inline]
 tcp_data_queue+0x115a/0x77b0 net/ipv4/tcp_input.c:4969
 tcp_rcv_state_process+0x1614/0x2340 net/ipv4/tcp_input.c:6541
 tcp_v4_do_rcv+0x5ab/0x870 net/ipv4/tcp_ipv4.c:1701
 sk_backlog_rcv include/net/sock.h:1016 [inline]
 __release_sock+0x1db/0x4d0 net/core/sock.c:2556
 release_sock+0x5d/0x1c0 net/core/sock.c:3080
 sk_wait_data+0x1ae/0x3c0 net/core/sock.c:2598
 tcp_recvmsg_locked+0xf24/0x2a40 net/ipv4/tcp.c:2434
 tcp_recvmsg+0x1c8/0x710 net/ipv4/tcp.c:2549
 inet_recvmsg+0xf6/0x1d0 net/ipv4/af_inet.c:852
 sock_recvmsg_nosec net/socket.c:888 [inline]
 sock_recvmsg net/socket.c:906 [inline]
 ____sys_recvmsg+0x24d/0x520 net/socket.c:2569
 ___sys_recvmsg net/socket.c:2611 [inline]
 __sys_recvmsg+0x242/0x7e0 net/socket.c:2641
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
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:00007f979c2a1188 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000100 RSI: 0000000020001440 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff230321df R14: 00007f979c2a1300 R15: 0000000000022000