From: Azeem Shaikh <azeemshaikh38@gmail.com> To: Sumit Semwal <sumit.semwal@linaro.org> Cc: linux-hardening@vger.kernel.org, "Azeem Shaikh" <azeemshaikh38@gmail.com>, "Gustavo Padovan" <gustavo@padovan.org>, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, "Christian König" <christian.koenig@amd.com>, linaro-mm-sig@lists.linaro.org Subject: [PATCH] dma-buf/sw_sync: Replace all non-returning strlcpy with strscpy Date: Tue, 23 May 2023 02:19:43 +0000 [thread overview] Message-ID: <20230523021943.2406847-1-azeemshaikh38@gmail.com> (raw) strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> --- drivers/dma-buf/sw_sync.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index 348b3a9170fa..63f0aeb66db6 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -85,7 +85,7 @@ static struct sync_timeline *sync_timeline_create(const char *name) kref_init(&obj->kref); obj->context = dma_fence_context_alloc(1); - strlcpy(obj->name, name, sizeof(obj->name)); + strscpy(obj->name, name, sizeof(obj->name)); obj->pt_tree = RB_ROOT; INIT_LIST_HEAD(&obj->pt_list);
WARNING: multiple messages have this Message-ID (diff)
From: Azeem Shaikh <azeemshaikh38@gmail.com> To: Sumit Semwal <sumit.semwal@linaro.org> Cc: "Gustavo Padovan" <gustavo@padovan.org>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, "Azeem Shaikh" <azeemshaikh38@gmail.com>, linaro-mm-sig@lists.linaro.org, linux-hardening@vger.kernel.org, "Christian König" <christian.koenig@amd.com>, linux-media@vger.kernel.org Subject: [PATCH] dma-buf/sw_sync: Replace all non-returning strlcpy with strscpy Date: Tue, 23 May 2023 02:19:43 +0000 [thread overview] Message-ID: <20230523021943.2406847-1-azeemshaikh38@gmail.com> (raw) strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> --- drivers/dma-buf/sw_sync.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index 348b3a9170fa..63f0aeb66db6 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -85,7 +85,7 @@ static struct sync_timeline *sync_timeline_create(const char *name) kref_init(&obj->kref); obj->context = dma_fence_context_alloc(1); - strlcpy(obj->name, name, sizeof(obj->name)); + strscpy(obj->name, name, sizeof(obj->name)); obj->pt_tree = RB_ROOT; INIT_LIST_HEAD(&obj->pt_list);
next reply other threads:[~2023-05-23 2:20 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-05-23 2:19 Azeem Shaikh [this message] 2023-05-23 2:19 ` [PATCH] dma-buf/sw_sync: Replace all non-returning strlcpy with strscpy Azeem Shaikh 2023-05-23 17:21 ` Kees Cook 2023-05-23 17:21 ` Kees Cook 2023-05-24 10:39 ` Sumit Semwal 2023-05-24 10:39 ` Sumit Semwal
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