------------[ cut here ]------------ WARNING: CPU: 0 PID: 28043 at net/core/skbuff.c:4398 skb_try_coalesce+0xeb7/0x1260 net/core/skbuff.c:4398 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 28043 Comm: syz-executor.0 Not tainted 4.9.194+ #0 ffff8801d65b7030 ffffffff81b67001 0000000000000000 ffffffff82a3b3c0 00000000ffffffff 0000000000000000 0000000000000009 ffff8801d65b7110 ffffffff813fef3a 0000000041b58ab3 ffffffff82e32f55 ffffffff813fed61 Call Trace: [<000000000b63adc5>] __dump_stack lib/dump_stack.c:15 [inline] [<000000000b63adc5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000b1ccb13f>] panic+0x1d9/0x3bd kernel/panic.c:180 [<000000001dd93a93>] __warn.cold+0x2f/0x2f kernel/panic.c:546 [<00000000cfeb9309>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589 [<000000005e6b511d>] skb_try_coalesce+0xeb7/0x1260 net/core/skbuff.c:4398 [<000000009747ecee>] tcp_try_coalesce+0x173/0x4e0 net/ipv4/tcp_input.c:4378 [<00000000da174ac6>] tcp_queue_rcv+0x129/0x5a0 net/ipv4/tcp_input.c:4630 [<0000000086ce1b19>] tcp_data_queue+0x600/0x3810 net/ipv4/tcp_input.c:4739 [<000000005b8b3fb9>] tcp_rcv_established+0x55a/0x20b0 net/ipv4/tcp_input.c:5620 [<00000000d7d53334>] tcp_v6_do_rcv+0xcd9/0x10f0 net/ipv6/tcp_ipv6.c:1283 [<000000004cd69a22>] sk_backlog_rcv include/net/sock.h:881 [inline] [<000000004cd69a22>] __release_sock+0x138/0x390 net/core/sock.c:2060 [<000000003574616e>] release_sock+0x59/0x1c0 net/core/sock.c:2524 [<000000003557027d>] tcp_sendpage net/ipv4/tcp.c:1034 [inline] [<000000003557027d>] tcp_sendpage+0x6b4/0x18f0 net/ipv4/tcp.c:1019 [<0000000019fd5829>] inet_sendpage+0x223/0x520 net/ipv4/af_inet.c:783 [<0000000092a93981>] kernel_sendpage+0x95/0xf0 net/socket.c:3326 [<00000000ff0bd032>] sock_sendpage+0x8b/0xc0 net/socket.c:803 [<0000000054e7d86c>] pipe_to_sendpage+0x28d/0x3d0 fs/splice.c:470 [<00000000636f5f08>] splice_from_pipe_feed fs/splice.c:521 [inline] [<00000000636f5f08>] __splice_from_pipe+0x351/0x790 fs/splice.c:645 [<0000000073794d6a>] splice_from_pipe+0x108/0x170 fs/splice.c:680 [<000000006c5989aa>] generic_splice_sendpage+0x3c/0x50 fs/splice.c:851 [<00000000d30e87f7>] do_splice_from fs/splice.c:870 [inline] [<00000000d30e87f7>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1037 [<000000005f9adecd>] splice_direct_to_actor+0x2c8/0x820 fs/splice.c:992 [<00000000b8541d15>] do_splice_direct+0x1a5/0x260 fs/splice.c:1080 [<00000000dcb908ca>] do_sendfile+0x503/0xc00 fs/read_write.c:1402 [<00000000937aa6d9>] SYSC_sendfile64 fs/read_write.c:1463 [inline] [<00000000937aa6d9>] SyS_sendfile64+0x145/0x160 fs/read_write.c:1449 [<000000007d14bc6f>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000053feba9b>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Kernel Offset: disabled Rebooting in 86400 seconds..