Use struct sctp_assoc_value instead ------------[ cut here ]------------ WARNING: CPU: 1 PID: 13502 at drivers/net/tun.c:1744 tun_get_user+0x2de3/0x36d0 drivers/net/tun.c:1743 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 13502 Comm: syz-executor5 Not tainted 4.14.0-rc4+ #82 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 panic+0x1e4/0x417 kernel/panic.c:181 __warn+0x1c4/0x1d9 kernel/panic.c:542 report_bug+0x211/0x2d0 lib/bug.c:183 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 RIP: 0010:tun_get_user+0x2de3/0x36d0 drivers/net/tun.c:1743 RSP: 0018:ffff8801c5d37730 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: ffff8801cbe5d458 RCX: dffffc0000000000 RDX: ffffffff8704ad20 RSI: 0000000000000000 RDI: ffffed0038ba6ea8 RBP: ffff8801c5d37ae0 R08: 0000000000000090 R09: 0000000000000000 R10: ffffffff87093340 R11: 0000000087e6a7b0 R12: ffff8801a76715c0 R13: ffff8801cbe5d4c8 R14: 0000000000000000 R15: ffff8801a8640f40 tun_chr_write_iter+0xbf/0x160 drivers/net/tun.c:1792 call_write_iter include/linux/fs.h:1770 [inline] do_iter_readv_writev+0x531/0x7f0 fs/read_write.c:673 do_iter_write+0x15a/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: 0033:0x4525f1 RSP: 002b:00007fd57b8f5b10 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00000000203f3000 RCX: 00000000004525f1 RDX: 0000000000000002 RSI: 00007fd57b8f5b60 RDI: 0000000000000012 RBP: 0000000000000543 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005e R11: 0000000000000293 R12: 00000000006f5ee8 R13: 00000000ffffffff R14: 00007fd57b8f66d4 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..