From 0fac3ed473dd2955053be6671cdd747807f5e488 Mon Sep 17 00:00:00 2001 From: Su Hui Date: Sun, 19 Jan 2025 10:59:47 +0800 Subject: [PATCH] fs/stat.c: avoid harmless garbage value problem in vfs_statx_path() Clang static checker(scan-build) warning: fs/stat.c:287:21: warning: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage. 287 | stat->result_mask |= STATX_MNT_ID_UNIQUE; | ~~~~~~~~~~~~~~~~~ ^ fs/stat.c:290:21: warning: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage. 290 | stat->result_mask |= STATX_MNT_ID; When vfs_getattr() failed because of security_inode_getattr(), 'stat' is uninitialized. In this case, there is a harmless garbage problem in vfs_statx_path(). It's better to return error directly when vfs_getattr() failed, avoiding garbage value and more clearly. Signed-off-by: Su Hui Link: https://lore.kernel.org/r/20250119025946.1168957-1-suhui@nfschina.com Signed-off-by: Christian Brauner --- fs/stat.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/stat.c b/fs/stat.c index 2c0e111a098a..f13308bfdc98 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -281,6 +281,8 @@ static int vfs_statx_path(struct path *path, int flags, struct kstat *stat, u32 request_mask) { int error = vfs_getattr(path, stat, request_mask, flags); + if (error) + return error; if (request_mask & STATX_MNT_ID_UNIQUE) { stat->mnt_id = real_mount(path->mnt)->mnt_id_unique; @@ -302,7 +304,7 @@ static int vfs_statx_path(struct path *path, int flags, struct kstat *stat, if (S_ISBLK(stat->mode)) bdev_statx(path, stat, request_mask); - return error; + return 0; } static int vfs_statx_fd(int fd, int flags, struct kstat *stat,