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drm/xe: Fix access_ok check in user_fence_create

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Check size of the data not size of the pointer.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202407300421.IBkAja96-lkp@intel.com/
Fixes: ddeb7989a9 ("drm/xe: Validate user fence during creation")
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Reviewed-by: Apoorva Singh <apoorva.singh@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240806110722.28661-1-nirmoy.das@intel.com
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
(cherry picked from commit e102b5ed6e)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Nirmoy Das 2024-08-06 13:07:22 +02:00 committed by Rodrigo Vivi
parent 5e2d1d4dc1
commit 062d59eb96
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GPG Key ID: FA625F640EEB13CA
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/xe/xe_sync.c
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@ -55,7 +55,7 @@ static struct xe_user_fence *user_fence_create(struct xe_device *xe, u64 addr,
struct xe_user_fence *ufence;
u64 __user *ptr = u64_to_user_ptr(addr);
if (!access_ok(ptr, sizeof(ptr)))
if (!access_ok(ptr, sizeof(*ptr)))
return ERR_PTR(-EFAULT);
ufence = kmalloc(sizeof(*ufence), GFP_KERNEL);