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drm/msm/gem: Add check for kmalloc

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Add the check for the return value of kmalloc in order to avoid
NULL pointer dereference in copy_from_user.

Fixes: 20224d715a ("drm/msm/submit: Move copy_from_user ahead of locking bos")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/514678/
Link: https://lore.kernel.org/r/20221212091117.43511-1-jiasheng@iscas.ac.cn
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Jiasheng Jiang 2022-12-12 17:11:17 +08:00 committed by Dmitry Baryshkov
parent d26407788c
commit d839f0811a
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/msm/msm_gem_submit.c
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@ -209,6 +209,10 @@ static int submit_lookup_cmds(struct msm_gem_submit *submit,
goto out;
}
submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
if (!submit->cmd[i].relocs) {
ret = -ENOMEM;
goto out;
}
ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
if (ret) {
ret = -EFAULT;