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smb3 file name too long fix

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Merge tag 'smb3-file-name-too-long-fix' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fix from Steve French:
 "smb3 file name too long fix"

* tag 'smb3-file-name-too-long-fix' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: check MaxPathNameComponentLength != 0 before using it
This commit is contained in:
Linus Torvalds 2017-11-01 07:59:39 -07:00
commit 89db69d670
1 changed files with 3 additions and 2 deletions
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5
fs/cifs/dir.c
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@ -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;
@ -520,7 +521,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
rc = check_name(direntry, tcon);
if (rc)
goto out_free_xid;
goto out;
server = tcon->ses->server;