WARNING: CPU: 0 PID: 2997 at ./include/net/sock.h:1507 sock_owned_by_me include/net/sock.h:1507 [inline]
WARNING: CPU: 0 PID: 2997 at ./include/net/sock.h:1507 sock_owned_by_user include/net/sock.h:1513 [inline]
WARNING: CPU: 0 PID: 2997 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2997 Comm: syzkaller915061 Not tainted 4.14.0-rc5-next-20171018+ #8
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:sock_owned_by_me include/net/sock.h:1507 [inline]
RIP: 0010:sock_owned_by_user include/net/sock.h:1513 [inline]
RIP: 0010:strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
RSP: 0018:ffff88006c80f7c8 EFLAGS: 00010293
RAX: ffff88006bc72180 RBX: ffff88003acf3c48 RCX: ffffffff847af437
RDX: 0000000000000000 RSI: ffff8800396d31a0 RDI: ffffffff85cc4be0
RBP: ffff88006c80f7e8 R08: 0000000000000002 R09: 1ffffffff0cddfbe
R10: ffff88006c80f6b0 R11: 1ffff1000d78e68b R12: ffff8800396d3100
R13: ffff88003acf3c50 R14: ffff88006c80f950 R15: ffff8800396d3100
 psock_data_ready+0x56/0x70 net/kcm/kcmsock.c:353
 unix_dgram_sendmsg+0xa72/0x1600 net/unix/af_unix.c:1808
 unix_seqpacket_sendmsg+0xf3/0x160 net/unix/af_unix.c:2062
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 sock_write_iter+0x31a/0x5d0 net/socket.c:911
 call_write_iter include/linux/fs.h:1770 [inline]
 do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:673
 do_iter_write+0x154/0x540 fs/read_write.c:952
 vfs_writev+0x18a/0x340 fs/read_write.c:997
 do_writev+0xfc/0x2a0 fs/read_write.c:1032
 SYSC_writev fs/read_write.c:1105 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1102
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x435049
RSP: 002b:00007ffdbe2cc838 EFLAGS: 00000217 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 0000000000435049
RDX: 0000000000000005 RSI: 0000000020019fb0 RDI: 0000000000000004
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
R13: 00000000004019c0 R14: 0000000000401a50 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..