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Code

s3-vfs: Prevent NULL pointer dereference in vfs_glusterfs.

Browse Source 
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13708

Guenther

Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Tue Dec 11 17:26:31 CET 2018 on sn-devel-144
This commit is contained in:
Günther Deschner 2018-10-10 17:32:25 +02:00
parent 884eeca39e
commit 75d15484f3
1 changed files with 147 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

176
source3/modules/vfs_glusterfs.c
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@ -496,11 +496,33 @@ static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
return (DIR *) fd;
}
static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
files_struct *fsp)
{
glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
if (glfd == NULL) {
DBG_INFO("Failed to fetch fsp extension\n");
return NULL;
}
if (*glfd == NULL) {
DBG_INFO("Empty glfs_fd_t pointer\n");
return NULL;
}
return *glfd;
}
static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
files_struct *fsp, const char *mask,
uint32_t attributes)
{
return (DIR *) *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return NULL;
}
return (DIR *)glfd;
}
static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
@ -591,8 +613,12 @@ static int vfs_gluster_open(struct vfs_handle_struct *handle,
static int vfs_gluster_close(struct vfs_handle_struct *handle,
files_struct *fsp)
{
glfs_fd_t *glfd;
glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
VFS_REMOVE_FSP_EXTENSION(handle, fsp);
return glfs_close(glfd);
}
@ -601,7 +627,13 @@ static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
files_struct *fsp, void *data, size_t n,
off_t offset)
{
return glfs_pread(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_pread(glfd, data, n, offset, 0);
}
struct glusterfs_aio_state;
@ -803,6 +835,12 @@ static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
struct glusterfs_aio_state *state = NULL;
struct tevent_req *req = NULL;
int ret = 0;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return NULL;
}
state = aio_state_create(mem_ctx);
@ -826,8 +864,7 @@ static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
tevent_req_defer_callback(req, ev);
PROFILE_TIMESTAMP(&state->start);
ret = glfs_pread_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
fsp), data, n, offset, 0, aio_glusterfs_done,
ret = glfs_pread_async(glfd, data, n, offset, 0, aio_glusterfs_done,
state);
if (ret < 0) {
tevent_req_error(req, -ret);
@ -847,6 +884,12 @@ static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
struct glusterfs_aio_state *state = NULL;
struct tevent_req *req = NULL;
int ret = 0;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return NULL;
}
state = aio_state_create(mem_ctx);
@ -870,8 +913,7 @@ static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
tevent_req_defer_callback(req, ev);
PROFILE_TIMESTAMP(&state->start);
ret = glfs_pwrite_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
fsp), data, n, offset, 0, aio_glusterfs_done,
ret = glfs_pwrite_async(glfd, data, n, offset, 0, aio_glusterfs_done,
state);
if (ret < 0) {
tevent_req_error(req, -ret);
@ -915,13 +957,25 @@ static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
files_struct *fsp, const void *data,
size_t n, off_t offset)
{
return glfs_pwrite(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_pwrite(glfd, data, n, offset, 0);
}
static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
files_struct *fsp, off_t offset, int whence)
{
return glfs_lseek(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset, whence);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_lseek(glfd, offset, whence);
}
static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
@ -957,6 +1011,12 @@ static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
struct tevent_req *req = NULL;
struct glusterfs_aio_state *state = NULL;
int ret = 0;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return NULL;
}
state = aio_state_create(mem_ctx);
@ -980,8 +1040,7 @@ static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
tevent_req_defer_callback(req, ev);
PROFILE_TIMESTAMP(&state->start);
ret = glfs_fsync_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
fsp), aio_glusterfs_done, state);
ret = glfs_fsync_async(glfd, aio_glusterfs_done, state);
if (ret < 0) {
tevent_req_error(req, -ret);
return tevent_req_post(req, ev);
@ -1020,8 +1079,14 @@ static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
{
struct stat st;
int ret;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
ret = glfs_fstat(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), &st);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
ret = glfs_fstat(glfd, &st);
if (ret == 0) {
smb_stat_ex_from_stat(sbuf, &st);
}
@ -1072,7 +1137,14 @@ static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
files_struct *fsp, mode_t mode)
{
return glfs_fchmod(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), mode);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_fchmod(glfd, mode);
}
static int vfs_gluster_chown(struct vfs_handle_struct *handle,
@ -1086,7 +1158,13 @@ static int vfs_gluster_chown(struct vfs_handle_struct *handle,
static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
files_struct *fsp, uid_t uid, gid_t gid)
{
return glfs_fchown(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), uid, gid);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_fchown(glfd, uid, gid);
}
static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
@ -1164,7 +1242,13 @@ static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
files_struct *fsp, off_t offset)
{
return glfs_ftruncate(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_ftruncate(glfd, offset);
}
static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
@ -1174,6 +1258,11 @@ static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
{
#ifdef HAVE_GFAPI_VER_6
int keep_size, punch_hole;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
@ -1185,14 +1274,10 @@ static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
}
if (punch_hole) {
return glfs_discard(*(glfs_fd_t **)
VFS_FETCH_FSP_EXTENSION(handle, fsp),
offset, len);
return glfs_discard(glfd, offset, len);
}
return glfs_fallocate(*(glfs_fd_t **)
VFS_FETCH_FSP_EXTENSION(handle, fsp),
keep_size, offset, len);
return glfs_fallocate(glfd, keep_size, offset, len);
#else
errno = ENOTSUP;
return -1;
@ -1229,6 +1314,11 @@ static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
{
struct flock flock = { 0, };
int ret;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return false;
}
flock.l_type = type;
flock.l_whence = SEEK_SET;
@ -1236,7 +1326,7 @@ static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
flock.l_len = count;
flock.l_pid = 0;
ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), op, &flock);
ret = glfs_posix_lock(glfd, op, &flock);
if (op == F_GETLK) {
/* lock query, true if someone else has locked */
@ -1276,6 +1366,11 @@ static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
{
struct flock flock = { 0, };
int ret;
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return false;
}
flock.l_type = *ptype;
flock.l_whence = SEEK_SET;
@ -1283,7 +1378,7 @@ static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
flock.l_len = *pcount;
flock.l_pid = 0;
ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), F_GETLK, &flock);
ret = glfs_posix_lock(glfd, F_GETLK, &flock);
if (ret == -1) {
return false;
@ -1393,7 +1488,13 @@ static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
files_struct *fsp, const char *name,
void *value, size_t size)
{
return glfs_fgetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_fgetxattr(glfd, name, value, size);
}
static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
@ -1408,7 +1509,13 @@ static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
files_struct *fsp, char *list,
size_t size)
{
return glfs_flistxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), list, size);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_flistxattr(glfd, list, size);
}
static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
@ -1421,7 +1528,13 @@ static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
files_struct *fsp, const char *name)
{
return glfs_fremovexattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_fremovexattr(glfd, name);
}
static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
@ -1436,8 +1549,13 @@ static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
files_struct *fsp, const char *name,
const void *value, size_t size, int flags)
{
return glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size,
flags);
glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
if (glfd == NULL) {
DBG_ERR("Failed to fetch gluster fd\n");
return -1;
}
return glfs_fsetxattr(glfd, name, value, size, flags);
}
/* AIO Operations */