xwayland: Check status in GBM pixmap creation
The current code in `xwl_glamor_gbm_create_pixmap_for_bo()` may fail in several cases that are not checked for: - `eglCreateImageKHR()` may have failed to create the image, - `glEGLImageTargetTexture2DOES()` may fail and set an error, - `glamor_set_pixmap_texture()` may fail for very large pixmaps because the corresponding FBO could not be created. Trying to upload content to a pixmap with no texture will crash Mesa, glamor and Xwayland, e.g.: XXX fail to create fbo. (EE) (EE) Backtrace: (EE) 0: Xwayland (OsSigHandler+0x29) (EE) 1: libpthread.so.0 (funlockfile+0x50) (EE) 2: libc.so.6 (__memmove_avx_unaligned_erms+0x215) (EE) 3: dri/i965_dri.so (_mesa_format_convert+0xab3) (EE) 4: dri/i965_dri.so (_mesa_texstore+0x205) (EE) 5: dri/i965_dri.so (store_texsubimage+0x28c) (EE) 6: dri/i965_dri.so (intel_upload_tex+0x13b) (EE) 7: dri/i965_dri.so (texture_sub_image+0x134) (EE) 8: dri/i965_dri.so (texsubimage_err+0x150) (EE) 9: dri/i965_dri.so (_mesa_TexSubImage2D+0x48) (EE) 10: Xwayland (glamor_upload_boxes+0x246) (EE) 11: Xwayland (glamor_copy+0x4d1) (EE) 12: Xwayland (miCopyRegion+0x96) (EE) 13: Xwayland (miDoCopy+0x43c) (EE) 14: Xwayland (glamor_copy_area+0x24) (EE) 15: Xwayland (damageCopyArea+0xba) (EE) 16: Xwayland (compCopyWindow+0x31c) (EE) 17: Xwayland (damageCopyWindow+0xd3) (EE) 18: Xwayland (miResizeWindow+0x7b7) (EE) 19: Xwayland (compResizeWindow+0x3a) (EE) 20: Xwayland (ConfigureWindow+0xa96) (EE) 21: Xwayland (ProcConfigureWindow+0x7d) (EE) 22: Xwayland (Dispatch+0x320) (EE) 23: Xwayland (dix_main+0x366) (EE) 24: libc.so.6 (__libc_start_main+0xf3) (EE) 25: Xwayland (_start+0x2e) (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) Check for the possible cases of failure above and fallback to the regular glamor pixmap creation when an error is detected. Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> Closes: https://gitlab.freedesktop.org/xorg/xserver/issues/661
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@ -169,6 +169,8 @@ xwl_glamor_gbm_create_pixmap_for_bo(ScreenPtr screen, struct gbm_bo *bo,
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xwl_screen->egl_context,
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EGL_NATIVE_PIXMAP_KHR,
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xwl_pixmap->bo, NULL);
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if (xwl_pixmap->image == EGL_NO_IMAGE_KHR)
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goto error;
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glGenTextures(1, &xwl_pixmap->texture);
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glBindTexture(GL_TEXTURE_2D, xwl_pixmap->texture);
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@ -176,14 +178,31 @@ xwl_glamor_gbm_create_pixmap_for_bo(ScreenPtr screen, struct gbm_bo *bo,
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, xwl_pixmap->image);
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if (eglGetError() != EGL_SUCCESS)
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goto error;
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glBindTexture(GL_TEXTURE_2D, 0);
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glamor_set_pixmap_texture(pixmap, xwl_pixmap->texture);
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/* `set_pixmap_texture()` may fail silently if the FBO creation failed,
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* so we check again the texture to be sure it worked.
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*/
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if (!glamor_get_pixmap_texture(pixmap))
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goto error;
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glamor_set_pixmap_type(pixmap, GLAMOR_TEXTURE_DRM);
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xwl_pixmap_set_private(pixmap, xwl_pixmap);
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glamor_set_pixmap_texture(pixmap, xwl_pixmap->texture);
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glamor_set_pixmap_type(pixmap, GLAMOR_TEXTURE_DRM);
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return pixmap;
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error:
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if (xwl_pixmap->image != EGL_NO_IMAGE_KHR)
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eglDestroyImageKHR(xwl_screen->egl_display, xwl_pixmap->image);
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if (pixmap)
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glamor_destroy_pixmap(pixmap);
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free(xwl_pixmap);
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return NULL;
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}
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static PixmapPtr
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@ -194,6 +213,7 @@ xwl_glamor_gbm_create_pixmap(ScreenPtr screen,
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struct xwl_screen *xwl_screen = xwl_screen_get(screen);
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struct xwl_gbm_private *xwl_gbm = xwl_gbm_get(xwl_screen);
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struct gbm_bo *bo;
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PixmapPtr pixmap = NULL;
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if (width > 0 && height > 0 && depth >= 15 &&
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(hint == 0 ||
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@ -219,10 +239,16 @@ xwl_glamor_gbm_create_pixmap(ScreenPtr screen,
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}
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if (bo)
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return xwl_glamor_gbm_create_pixmap_for_bo(screen, bo, depth);
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pixmap = xwl_glamor_gbm_create_pixmap_for_bo(screen, bo, depth);
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if (!pixmap)
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gbm_bo_destroy(bo);
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}
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return glamor_create_pixmap(screen, width, height, depth, hint);
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if (!pixmap)
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pixmap = glamor_create_pixmap(screen, width, height, depth, hint);
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return pixmap;
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}
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static Bool
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