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

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commit 9d63509547 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 b6abe33809
commit 1de3dbd9a0
1 changed files with 2 additions and 0 deletions
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2
fs/smb/client/inode.c
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@ -823,6 +823,8 @@ static void cifs_open_info_to_fattr(struct cifs_fattr *fattr,
out_reparse:
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;
}