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BUG: KMSAN: uninit-value in p9_client_rpc+0x1067/0x13d0 net/9p/client.c:801
CPU: 1 PID: 17783 Comm: syz-executor.0 Tainted: G        W         5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
 p9_client_rpc+0x1067/0x13d0 net/9p/client.c:801
 p9_client_version+0x1d3/0x9e0 net/9p/client.c:945
 p9_client_create+0x1401/0x16d0 net/9p/client.c:1055
 v9fs_session_init+0x2b1/0x2cd0 fs/9p/v9fs.c:406
 v9fs_mount+0x134/0x1300 fs/9p/vfs_super.c:126
 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592
 vfs_get_tree+0xd8/0x5e0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x3d64/0x5c20 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x921/0xa10 fs/namespace.c:3431
 __ia32_sys_mount+0x62/0x80 fs/namespace.c:3431
 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline]
 __do_fast_syscall_32+0x127/0x180 arch/x86/entry/common.c:142
 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fcf549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f55c95fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000040
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Local variable ----ecode@p9_check_errors created at:
 p9_check_errors+0x69/0xba0 net/9p/client.c:504
 p9_check_errors+0x69/0xba0 net/9p/client.c:504
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