==================================================================
BUG: KMSAN: uninit-value in p9_client_rpc+0x194c/0x1dc0 net/9p/client.c:818
CPU: 0 PID: 7982 Comm: syz-executor7 Not tainted 4.18.0-rc4+ #24
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+0x185/0x1e0 lib/dump_stack.c:113
 kmsan_report+0x195/0x2c0 mm/kmsan/kmsan.c:1092
 __msan_warning_32+0x7d/0xe0 mm/kmsan/kmsan_instr.c:640
 p9_client_rpc+0x194c/0x1dc0 net/9p/client.c:818
 p9_client_create+0x15a8/0x2110 net/9p/client.c:966
 v9fs_session_init+0x329/0x2970 fs/9p/v9fs.c:400
 v9fs_mount+0x107/0x11b0 fs/9p/vfs_super.c:135
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 mount_fs+0x29b/0x780 fs/super.c:1277
 vfs_kern_mount+0x222/0x990 fs/namespace.c:1037
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0xd30/0x5310 fs/namespace.c:2848
 ksys_mount+0x32e/0x3d0 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0x157/0x1c0 fs/namespace.c:3075
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455e29
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007feed0004c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007feed00056d4 RCX: 0000000000455e29
RDX: 0000000020000600 RSI: 00000000200005c0 RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000020000240 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c05ca R14: 00000000004d0070 R15: 0000000000000000

CPU: 1 PID: 7985 Comm: syz-executor1 Not tainted 4.18.0-rc4+ #24
Local variable description: ----ecode.i@p9_client_rpc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Variable was created at:
Call Trace: