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smb: client: report correct st_size for SMB and NFS symlinks

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commit 9d63509547a940225d06d7eba1dc412befae255d upstream.

We can't rely on FILE_STANDARD_INFORMATION::EndOfFile for reparse
points as they will be always zero.  Set it to symlink target's length
as specified by POSIX.

This will make stat() family of syscalls return the correct st_size
for such files.

Cc: stable@vger.kernel.org
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paulo Alcantara 2023-11-28 16:37:19 -03:00 • committed by Greg Kroah-Hartman
parent 60fed17ca5
commit 74820f7406
1 changed files with 2 additions and 0 deletions
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2
fs/smb/client/inode.c
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@ -772,6 +772,8 @@ static void cifs_open_info_to_fattr(struct cifs_fattr *fattr, struct cifs_open_i
}
if (S_ISLNK(fattr->cf_mode)) {
if (likely(data->symlink_target))
fattr->cf_eof = strnlen(data->symlink_target, PATH_MAX);
fattr->cf_symlink_target = data->symlink_target;
data->symlink_target = NULL;
}