diff options
| author | Zishun Yi <zishun.yi.dev@gmail.com> | 2026-01-30 01:10:22 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-26 15:01:02 -0800 |
| commit | f9f4366d2ff93b07c2571561c776bd9a708078c3 (patch) | |
| tree | 2e8e7497d0c8453943522188c0e8e70d9a99f68a /drivers/accel/amdxdna/amdxdna_ubuf.c | |
| parent | 688c3ff079b10e4600f040944430d3d4ff448a15 (diff) | |
accel/amdxdna: Fix memory leak in amdxdna_ubuf_map
[ Upstream commit 84dd57fb0359500092f1101409ca32091731490d ]
The amdxdna_ubuf_map() function allocates memory for sg and
internal sg table structures, but it fails to free them if subsequent
operations (sg_alloc_table_from_pages or dma_map_sgtable) fail.
Fixes: bd72d4acda10 ("accel/amdxdna: Support user space allocated buffer")
Signed-off-by: Zishun Yi <zishun.yi.dev@gmail.com>
Reviewed-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Min Ma <mamin506@gmail.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260129171022.68578-1-zishun.yi.dev@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/accel/amdxdna/amdxdna_ubuf.c')
| -rw-r--r-- | drivers/accel/amdxdna/amdxdna_ubuf.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/accel/amdxdna/amdxdna_ubuf.c b/drivers/accel/amdxdna/amdxdna_ubuf.c index 077b2261cf2a..9e3b3b055caa 100644 --- a/drivers/accel/amdxdna/amdxdna_ubuf.c +++ b/drivers/accel/amdxdna/amdxdna_ubuf.c @@ -34,15 +34,21 @@ static struct sg_table *amdxdna_ubuf_map(struct dma_buf_attachment *attach, ret = sg_alloc_table_from_pages(sg, ubuf->pages, ubuf->nr_pages, 0, ubuf->nr_pages << PAGE_SHIFT, GFP_KERNEL); if (ret) - return ERR_PTR(ret); + goto err_free_sg; if (ubuf->flags & AMDXDNA_UBUF_FLAG_MAP_DMA) { ret = dma_map_sgtable(attach->dev, sg, direction, 0); if (ret) - return ERR_PTR(ret); + goto err_free_table; } return sg; + +err_free_table: + sg_free_table(sg); +err_free_sg: + kfree(sg); + return ERR_PTR(ret); } static void amdxdna_ubuf_unmap(struct dma_buf_attachment *attach, |