linux-kernel - Re: [syzbot] [fuse?] KMSAN: uninit-value in fuse_fileattr

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Message-ID: <tencent_19BAECA6CF80794E6FEC2D456D88972CE80A@qq.com>
Date: Fri,  6 Feb 2026 13:50:12 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+7c31755f2cea07838b0c@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fuse?] KMSAN: uninit-value in fuse_fileattr_get

#syz test

diff --git a/fs/file_attr.c b/fs/file_attr.c
index 13cdb31a3e94..4889cf59b256 100644
--- a/fs/file_attr.c
+++ b/fs/file_attr.c
@@ -377,7 +377,7 @@ SYSCALL_DEFINE5(file_getattr, int, dfd, const char __user *, filename,
 	struct filename *name __free(putname) = NULL;
 	unsigned int lookup_flags = 0;
 	struct file_attr fattr;
-	struct file_kattr fa;
+	struct file_kattr fa = { .flags_valid = true }; /* hint only */
 	int error;
 
 	BUILD_BUG_ON(sizeof(struct file_attr) < FILE_ATTR_SIZE_VER0);