=====================================================
BUG: KMSAN: uninit-value in p9_client_read_once+0x940/0x1010 net/9p/client.c:1602
 p9_client_read_once+0x940/0x1010 net/9p/client.c:1602
 p9_client_read+0xe4/0x280 net/9p/client.c:1561
 v9fs_fid_xattr_get+0x29a/0x3d0 fs/9p/xattr.c:43
 v9fs_xattr_get fs/9p/xattr.c:73 [inline]
 v9fs_xattr_handler_get+0xf6/0x170 fs/9p/xattr.c:148
 __vfs_getxattr fs/xattr.c:401 [inline]
 vfs_getxattr+0xae1/0xc40 fs/xattr.c:434
 do_getxattr+0x224/0x7d0 fs/xattr.c:694
 getxattr fs/xattr.c:731 [inline]
 path_getxattr+0x36a/0x5a0 fs/xattr.c:747
 __do_sys_lgetxattr fs/xattr.c:765 [inline]
 __se_sys_lgetxattr fs/xattr.c:762 [inline]
 __ia32_sys_lgetxattr+0xbc/0x110 fs/xattr.c:762
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:755 [inline]
 slab_alloc_node mm/slub.c:3258 [inline]
 slab_alloc mm/slub.c:3266 [inline]
 kmem_cache_alloc_trace+0x69e/0xdf0 mm/slub.c:3297
 kmalloc include/linux/slab.h:600 [inline]
 p9_fid_create+0x5e/0x400 net/9p/client.c:892
 p9_client_xattrwalk+0x61/0x9f0 net/9p/client.c:2019
 v9fs_fid_xattr_get+0xe9/0x3d0 fs/9p/xattr.c:29
 v9fs_xattr_get fs/9p/xattr.c:73 [inline]
 v9fs_xattr_handler_get+0xf6/0x170 fs/9p/xattr.c:148
 __vfs_getxattr fs/xattr.c:401 [inline]
 vfs_getxattr+0xae1/0xc40 fs/xattr.c:434
 do_getxattr+0x224/0x7d0 fs/xattr.c:694
 getxattr fs/xattr.c:731 [inline]
 path_getxattr+0x36a/0x5a0 fs/xattr.c:747
 __do_sys_lgetxattr fs/xattr.c:765 [inline]
 __se_sys_lgetxattr fs/xattr.c:762 [inline]
 __ia32_sys_lgetxattr+0xbc/0x110 fs/xattr.c:762
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 29656 Comm: syz-executor.0 Not tainted 5.19.0-syzkaller-32655-g1b070a5d1a2c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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