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Security fix. Zero pages before they are handed to user space.

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Shared memory areas were not cleared when they are allocated and
handed to user space. Sensitive information may leak.
This commit is contained in:
Thomas Hellstrom 2006-12-19 23:23:17 +01:00
parent 81251bf78f
commit 72b5d1507a
1 changed files with 1 additions and 0 deletions
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linux-core/drm_bufs.c
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@ -202,6 +202,7 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -ENOMEM;
}
memset(map->handle, 0, map->size);
map->offset = (unsigned long)map->handle;
if (map->flags & _DRM_CONTAINS_LOCK) {
/* Prevent a 2nd X Server from creating a 2nd lock */