================================================================== BUG: KMSAN: uninit-value in p9_client_rpc+0x194c/0x1dc0 net/9p/client.c:818 CPU: 0 PID: 14601 Comm: syz-executor4 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_attach+0x35b/0xc30 net/9p/client.c:1147 v9fs_session_init+0x24b9/0x2970 fs/9p/v9fs.c:449 v9fs_mount+0x107/0x11b0 fs/9p/vfs_super.c:135 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:00007f2b81f7fc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2b81f806d4 RCX: 0000000000455e29 RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000072bea0 R08: 0000000020000380 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c05ca R14: 00000000004d0070 R15: 0000000000000000 Local variable description: ----ecode.i@p9_client_rpc Variable was created at: p9_client_rpc+0x183/0x1dc0 net/9p/client.c:750 p9_client_attach+0x35b/0xc30 net/9p/client.c:1147 ==================================================================