IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
==================================================================
BUG: KMSAN: uninit-value in copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
BUG: KMSAN: uninit-value in raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
BUG: KMSAN: uninit-value in __copy_from_user_inatomic include/linux/uaccess.h:69 [inline]
BUG: KMSAN: uninit-value in __probe_kernel_read+0x224/0x280 mm/maccess.c:33
CPU: 1 PID: 6803 Comm: syz-executor1 Not tainted 4.17.0-rc3+ #88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 __copy_from_user_inatomic include/linux/uaccess.h:69 [inline]
 __probe_kernel_read+0x224/0x280 mm/maccess.c:33
 is_valid_bugaddr+0xb6/0x1a0 arch/x86/kernel/traps.c:168
 report_bug+0x6f/0x880 lib/bug.c:149
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1aa/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:kmsan_copy_to_user+0x141/0x160 mm/kmsan/kmsan.c:1213
RSP: 0018:ffff88014937f988 EFLAGS: 00010206
RAX: ffff88014af1d7c0 RBX: ffff88014937fb20 RCX: 0000000000000012
RDX: 00007ffffffff000 RSI: ffff88014937fb20 RDI: 616e732f7665642f
RBP: ffff88014937f9d0 R08: 0000000001080020 R09: ffff8801488cfa44
R10: 0000000000000000 R11: 0000000100100010 R12: 0000000000000012
R13: 616e732f7665642f R14: 0000000000000000 R15: 00000000820000d4
 copy_to_user include/linux/uaccess.h:184 [inline]
 move_addr_to_user+0x32e/0x530 net/socket.c:226
 ___sys_recvmsg+0x4e2/0x810 net/socket.c:2285
 __sys_recvmmsg+0x58e/0xe30 net/socket.c:2391
 do_sys_recvmmsg+0x217/0x3e0 net/socket.c:2467
 __do_sys_recvmmsg net/socket.c:2485 [inline]
 __se_sys_recvmmsg net/socket.c:2481 [inline]
 __x64_sys_recvmmsg+0x15d/0x1c0 net/socket.c:2481
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455979
RSP: 002b:00007fb6ab736c68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fb6ab7376d4 RCX: 0000000000455979
RDX: 00000000000003a6 RSI: 0000000020000100 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004e3 R14: 00000000006fb5e8 R15: 0000000000000000

Local variable description: ----this@link_path_walk
Variable was created at:
 link_path_walk+0x5e/0x2140 fs/namei.c:2028
 path_openat+0x53c/0x6450 fs/namei.c:3500
==================================================================