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authorDominique Martinet <asmadeus@codewreck.org>2023-10-25 13:34:44 +0300
committerDominique Martinet <asmadeus@codewreck.org>2023-10-26 01:05:52 +0300
commit9b5c6281838fc84683dd99b47302d81fce399918 (patch)
treec5e9c1c4fb870b46e46ad658bffdd4817181897f /fs/9p
parent355f074609dbf3042900ea9d30fcd2b0c323a365 (diff)
downloadlinux-9b5c6281838fc84683dd99b47302d81fce399918.tar.xz
9p: v9fs_listxattr: fix %s null argument warning
W=1 warns about null argument to kprintf: In file included from fs/9p/xattr.c:12: In function ‘v9fs_xattr_get’, inlined from ‘v9fs_listxattr’ at fs/9p/xattr.c:142:9: include/net/9p/9p.h:55:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 55 | _p9_debug(level, __func__, fmt, ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Use an empty string instead of : - this is ok 9p-wise because p9pdu_vwritef serializes a null string and an empty string the same way (one '0' word for length) - since this degrades the print statements, add new single quotes for xattr's name delimter (Old: "file = (null)", new: "file = ''") Link: https://lore.kernel.org/r/20231008060138.517057-1-suhui@nfschina.com Suggested-by: Su Hui <suhui@nfschina.com> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org> Acked-by: Christian Schoenebeck <linux_oss@crudebyte.com> Message-ID: <20231025103445.1248103-2-asmadeus@codewreck.org>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/xattr.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index e00cf8109b3f..3c4572ef3a48 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -68,7 +68,7 @@ ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
struct p9_fid *fid;
int ret;
- p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu\n",
+ p9_debug(P9_DEBUG_VFS, "name = '%s' value_len = %zu\n",
name, buffer_size);
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
@@ -139,7 +139,8 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
- return v9fs_xattr_get(dentry, NULL, buffer, buffer_size);
+ /* Txattrwalk with an empty string lists xattrs instead */
+ return v9fs_xattr_get(dentry, "", buffer, buffer_size);
}
static int v9fs_xattr_handler_get(const struct xattr_handler *handler,