2013-11-21 14:47:02 +00:00
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/*
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* Copyright © 2012 Intel Corporation
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* Copyright © 2013 Collabora, Ltd.
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*
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2015-06-11 22:39:40 +00:00
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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2013-11-21 14:47:02 +00:00
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*
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2015-06-11 22:39:40 +00:00
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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2013-11-21 14:47:02 +00:00
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*/
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2014-04-07 11:40:35 +00:00
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#include "config.h"
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2019-07-22 13:06:20 +00:00
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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2013-11-21 14:47:02 +00:00
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#include <unistd.h>
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2015-06-15 22:37:07 +00:00
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#include "shared/os-compatibility.h"
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2013-11-21 14:47:02 +00:00
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#include "weston-test-client-helper.h"
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2019-07-22 13:06:20 +00:00
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/* These three functions are copied from shared/os-compatibility.c in order to
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* behave like older clients, and allow ftruncate() to shrink the file’s size,
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* so SIGBUS can still happen.
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*
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* There is no reason not to use os_create_anonymous_file() otherwise. */
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#ifndef HAVE_MKOSTEMP
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static int
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set_cloexec_or_close(int fd)
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{
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if (os_fd_set_cloexec(fd) != 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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#endif
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static int
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create_tmpfile_cloexec(char *tmpname)
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{
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int fd;
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#ifdef HAVE_MKOSTEMP
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fd = mkostemp(tmpname, O_CLOEXEC);
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if (fd >= 0)
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unlink(tmpname);
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#else
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fd = mkstemp(tmpname);
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if (fd >= 0) {
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fd = set_cloexec_or_close(fd);
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unlink(tmpname);
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}
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#endif
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return fd;
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}
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static int
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create_anonymous_file_without_seals(off_t size)
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{
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static const char template[] = "/weston-test-XXXXXX";
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const char *path;
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char *name;
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int fd;
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int ret;
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path = getenv("XDG_RUNTIME_DIR");
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if (!path) {
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errno = ENOENT;
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return -1;
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}
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name = malloc(strlen(path) + sizeof(template));
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if (!name)
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return -1;
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strcpy(name, path);
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strcat(name, template);
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fd = create_tmpfile_cloexec(name);
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free(name);
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if (fd < 0)
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return -1;
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#ifdef HAVE_POSIX_FALLOCATE
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do {
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ret = posix_fallocate(fd, 0, size);
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} while (ret == EINTR);
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if (ret != 0) {
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close(fd);
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errno = ret;
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return -1;
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}
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#else
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do {
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ret = ftruncate(fd, size);
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} while (ret < 0 && errno == EINTR);
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if (ret < 0) {
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close(fd);
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return -1;
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}
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#endif
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return fd;
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}
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2013-11-21 14:47:02 +00:00
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/* tests, that attempt to crash the compositor on purpose */
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static struct wl_buffer *
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create_bad_shm_buffer(struct client *client, int width, int height)
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{
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struct wl_shm *shm = client->wl_shm;
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int stride = width * 4;
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int size = stride * height;
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struct wl_shm_pool *pool;
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struct wl_buffer *buffer;
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int fd;
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2019-07-22 13:06:20 +00:00
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fd = create_anonymous_file_without_seals(size);
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2013-11-21 14:47:02 +00:00
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assert(fd >= 0);
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pool = wl_shm_create_pool(shm, fd, size);
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buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride,
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WL_SHM_FORMAT_ARGB8888);
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wl_shm_pool_destroy(pool);
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/* Truncate the file to a small size, so that the compositor
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* will access it out-of-bounds, and hit SIGBUS.
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*/
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assert(ftruncate(fd, 12) == 0);
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close(fd);
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return buffer;
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}
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2014-07-16 09:40:25 +00:00
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TEST(test_truncated_shm_file)
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2013-11-21 14:47:02 +00:00
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{
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struct client *client;
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struct wl_buffer *bad_buffer;
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struct wl_surface *surface;
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int frame;
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2015-03-26 10:56:10 +00:00
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client = create_client_and_test_surface(46, 76, 111, 134);
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2013-11-21 14:47:02 +00:00
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assert(client);
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surface = client->surface->wl_surface;
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bad_buffer = create_bad_shm_buffer(client, 200, 200);
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wl_surface_attach(surface, bad_buffer, 0, 0);
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wl_surface_damage(surface, 0, 0, 200, 200);
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frame_callback_set(surface, &frame);
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wl_surface_commit(surface);
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2014-07-16 09:40:25 +00:00
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frame_callback_wait_nofail(client, &frame);
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expect_protocol_error(client, &wl_buffer_interface,
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WL_SHM_ERROR_INVALID_FD);
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2013-11-21 14:47:02 +00:00
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}
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