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s3: VFS: cap: Fix cap_readlinkat() to cope with real directory fsps.

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Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <noel.power@suse.com>
This commit is contained in:
Jeremy Allison 2021-02-11 09:21:41 -08:00
parent ca6cad5f00
commit 545ba86581
1 changed files with 15 additions and 3 deletions
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18
source3/modules/vfs_cap.c
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@ -553,12 +553,22 @@ static int cap_readlinkat(vfs_handle_struct *handle,
char *buf,
size_t bufsiz)
{
char *cappath = capencode(talloc_tos(), smb_fname->base_name);
struct smb_filename *full_fname = NULL;
struct smb_filename *cap_smb_fname = NULL;
char *cappath = NULL;
int saved_errno = 0;
int ret;
if (!cappath) {
full_fname = full_path_from_dirfsp_atname(talloc_tos(),
dirfsp,
smb_fname);
if (full_fname == NULL) {
return -1;
}
cappath = capencode(talloc_tos(), full_fname->base_name);
if (cappath == NULL) {
TALLOC_FREE(full_fname);
errno = ENOMEM;
return -1;
}
@ -569,18 +579,20 @@ static int cap_readlinkat(vfs_handle_struct *handle,
smb_fname->twrp,
smb_fname->flags);
if (cap_smb_fname == NULL) {
TALLOC_FREE(full_fname);
TALLOC_FREE(cappath);
errno = ENOMEM;
return -1;
}
ret = SMB_VFS_NEXT_READLINKAT(handle,
dirfsp,
handle->conn->cwd_fsp,
cap_smb_fname,
buf,
bufsiz);
if (ret == -1) {
saved_errno = errno;
}
TALLOC_FREE(full_fname);
TALLOC_FREE(cappath);
TALLOC_FREE(cap_smb_fname);
if (saved_errno != 0) {