------------[ cut here ]------------ WARNING: CPU: 0 PID: 2260 at net/core/skbuff.c:4353 skb_try_coalesce+0xeb1/0x1270 net/core/skbuff.c:4353 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 2260 Comm: syz-executor415 Not tainted 4.9.125+ #40 ffff8801b82773d0 ffffffff81af0ae9 ffffffff82838ba0 00000000ffffffff 0000000000000000 0000000000000000 0000000000001101 ffff8801b8277490 ffffffff813df095 0000000041b58ab3 ffffffff82c28773 ffffffff813deed6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] skb_try_coalesce+0xeb1/0x1270 net/core/skbuff.c:4353 [] tcp_try_coalesce+0x159/0x490 net/ipv4/tcp_input.c:4362 [] tcp_queue_rcv+0x127/0x590 net/ipv4/tcp_input.c:4616 [] tcp_data_queue+0x96d/0x38a0 net/ipv4/tcp_input.c:4725 [] tcp_rcv_established+0x53d/0x1ff0 net/ipv4/tcp_input.c:5613 [] tcp_v6_do_rcv+0xcd1/0x10e0 net/ipv6/tcp_ipv6.c:1283 [] sk_backlog_rcv include/net/sock.h:871 [inline] [] __release_sock+0x13a/0x390 net/core/sock.c:2059 [] __sk_flush_backlog+0x27/0x40 net/core/sock.c:2079 [] sk_flush_backlog include/net/sock.h:940 [inline] [] tcp_sendmsg+0x245e/0x2fd0 net/ipv4/tcp.c:1225 [] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:770 [] sock_sendmsg_nosec net/socket.c:648 [inline] [] sock_sendmsg+0xbb/0x110 net/socket.c:658 [] SYSC_sendto net/socket.c:1683 [inline] [] SyS_sendto+0x220/0x370 net/socket.c:1651 [] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline] [] do_fast_syscall_32+0x2f1/0x860 arch/x86/entry/common.c:387 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..