From: Jianglei Nie <niejianglei2021@163.com> To: bskeggs@redhat.com, kherbst@redhat.com, lyude@redhat.com, airlied@linux.ie, daniel@ffwll.ch Cc: ri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jianglei Nie <niejianglei2021@163.com> Subject: [PATCH] drm/nouveau/nouveau_bo: fix potential memory leak in nouveau_bo_alloc() Date: Tue, 5 Jul 2022 17:43:06 +0800 [thread overview] Message-ID: <20220705094306.2244103-1-niejianglei2021@163.com> (raw) 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> --- 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 05076e530e7d..d0887438b07e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -281,8 +281,10 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain, 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) { -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Jianglei Nie <niejianglei2021@163.com> To: bskeggs@redhat.com, kherbst@redhat.com, lyude@redhat.com, airlied@linux.ie, daniel@ffwll.ch Cc: nouveau@lists.freedesktop.org, ri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jianglei Nie <niejianglei2021@163.com> Subject: [Nouveau] [PATCH] drm/nouveau/nouveau_bo: fix potential memory leak in nouveau_bo_alloc() Date: Tue, 5 Jul 2022 17:43:06 +0800 [thread overview] Message-ID: <20220705094306.2244103-1-niejianglei2021@163.com> (raw) 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> --- 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 05076e530e7d..d0887438b07e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -281,8 +281,10 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain, 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) { -- 2.25.1
next reply other threads:[~2022-07-05 9:43 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-05 9:43 Jianglei Nie [this message] 2022-07-05 9:43 ` [Nouveau] [PATCH] drm/nouveau/nouveau_bo: fix potential memory leak in nouveau_bo_alloc() Jianglei Nie 2022-07-07 19:55 ` Lyude Paul 2022-07-07 19:55 ` [Nouveau] " Lyude Paul
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