[5.4,210/255] drm/nouveau/nouveau_bo: fix potential memory leak in nouveau_bo_alloc()
Commit Message
Greg KH
Oct. 24, 2022, 11:32 a.m. UTC
From: Jianglei Nie <niejianglei2021@163.com> [ Upstream commit 6dc548745d5b5102e3c53dc5097296ac270b6c69 ] nouveau_bo_alloc() allocates a memory chunk for "nvbo" with kzalloc(). When some error occurs, "nvbo" should be released. But when WARN_ON(pi < 0)) equals true, the function return ERR_PTR without releasing the "nvbo", which will lead to a memory leak. We should release the "nvbo" with kfree() if WARN_ON(pi < 0)) equals true. Signed-off-by: Jianglei Nie <niejianglei2021@163.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220705094306.2244103-1-niejianglei2021@163.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/nouveau/nouveau_bo.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index f7603be569fc..9f9c70734180 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -276,8 +276,10 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 flags, break; } - if (WARN_ON(pi < 0)) + if (WARN_ON(pi < 0)) { + kfree(nvbo); return ERR_PTR(-EINVAL); + } /* Disable compression if suitable settings couldn't be found. */ if (nvbo->comp && !vmm->page[pi].comp) {