| From: |
| Kees Cook <kees.cook@canonical.com> |
| To: |
| linux-kernel@vger.kernel.org |
| Subject: |
| [PATCH] drm: do not leak kernel addresses via /proc/dri/*/vma |
| Date: |
| Fri, 11 Feb 2011 19:29:44 -0800 |
| Message-ID: |
| <20110212032944.GA24080@outflux.net> |
| Cc: |
| David Airlie <airlied@linux.ie>, dri-devel@lists.freedesktop.org,
Dan Rosenberg <drosenberg@vsecurity.com>,
Eugene Teo <eugeneteo@kernel.org> |
| Archive‑link: | |
Article |
In the continuing effort to avoid kernel addresses leaking to unprivileged
users, this patch switches to %pK for /proc/dri/*/vma.
Signed-off-by: Kees Cook <kees.cook@canonical.com>
---
drivers/gpu/drm/drm_info.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index 3cdbaf3..be9a9c0 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -283,17 +283,18 @@ int drm_vma_info(struct seq_file *m, void *data)
#endif
mutex_lock(&dev->struct_mutex);
- seq_printf(m, "vma use count: %d, high_memory = %p, 0x%08llx\n",
+ seq_printf(m, "vma use count: %d, high_memory = %pK, 0x%pK\n",
atomic_read(&dev->vma_count),
- high_memory, (u64)virt_to_phys(high_memory));
+ high_memory, (void *)virt_to_phys(high_memory));
list_for_each_entry(pt, &dev->vmalist, head) {
vma = pt->vma;
if (!vma)
continue;
seq_printf(m,
- "\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
- pt->pid, vma->vm_start, vma->vm_end,
+ "\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000",
+ pt->pid,
+ (void *)vma->vm_start, (void *)vma->vm_end,
vma->vm_flags & VM_READ ? 'r' : '-',
vma->vm_flags & VM_WRITE ? 'w' : '-',
vma->vm_flags & VM_EXEC ? 'x' : '-',
--
1.7.2.3
--
Kees Cook
Ubuntu Security Team
--
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