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| author | Xiaogang Chen <xiaogang.chen@amd.com> | 2025-10-30 11:08:32 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-02 22:15:23 +0900 |
| commit | 29b65a3171a49c9b69f31035146be966cec40b7a (patch) | |
| tree | bf85e73de18c72a37e9c5667ab96a6852bde3348 | |
| parent | 57100b87c77818cb0d582a92e5cb32fff85c757d (diff) | |
| download | linux-29b65a3171a49c9b69f31035146be966cec40b7a.tar.gz linux-29b65a3171a49c9b69f31035146be966cec40b7a.tar.bz2 linux-29b65a3171a49c9b69f31035146be966cec40b7a.zip | |
udmabuf: fix a buf size overflow issue during udmabuf creation
[ Upstream commit 021ba7f1babd029e714d13a6bf2571b08af96d0f ]
by casting size_limit_mb to u64 when calculate pglimit.
Signed-off-by: Xiaogang Chen<Xiaogang.Chen@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250321164126.329638-1-xiaogang.chen@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Amelia Crate <acrate@waldn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/dma-buf/udmabuf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 0e127a9109e7..2e5c30f7ba0f 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -350,7 +350,7 @@ static long udmabuf_create(struct miscdevice *device, return -ENOMEM; INIT_LIST_HEAD(&ubuf->unpin_list); - pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; + pglimit = ((u64)size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; for (i = 0; i < head->count; i++) { if (!PAGE_ALIGNED(list[i].offset)) goto err; |