cifs: check MaxPathNameComponentLength != 0 before using it

Message ID 20171025223132.10046-1-lsahlber@redhat.com
State New
Headers show
Series
  • cifs: check MaxPathNameComponentLength != 0 before using it
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Commit Message

Leif Sahlberg Oct. 25, 2017, 10:31 p.m.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
---
 fs/cifs/dir.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e702d48bd023..513ff2986c97 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -204,7 +204,8 @@  check_name(struct dentry *direntry, struct cifs_tcon *tcon)
 	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
 	int i;
 
-	if (unlikely(direntry->d_name.len >
+	if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
+		     direntry->d_name.len >
 		     le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
 		return -ENAMETOOLONG;