diff options
| author | Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com> | 2023-06-14 19:15:28 +0300 |
|---|---|---|
| committer | Jeffrey Hugo <quic_jhugo@quicinc.com> | 2023-06-20 17:07:29 +0300 |
| commit | 8d0d16a3ef44c60d66f937c21f32fa2cf8f2c9ed (patch) | |
| tree | 42e03d915b885d2d3f1fee9beecb6dc82257d732 /drivers/accel | |
| parent | 45a3e24f65e90a047bef86f927ebdc4c710edaa1 (diff) | |
| download | linux-8d0d16a3ef44c60d66f937c21f32fa2cf8f2c9ed.tar.xz | |
accel/qaic: Call DRM helper function to destroy prime GEM
smatch warning:
drivers/accel/qaic/qaic_data.c:620 qaic_free_object() error:
dereferencing freed memory 'obj->import_attach'
obj->import_attach is detached and freed using dma_buf_detach().
But used after free to decrease the dmabuf ref count using
dma_buf_put().
drm_prime_gem_destroy() handles this issue and performs the proper clean
up instead of open coding it in the driver.
Fixes: ff13be830333 ("accel/qaic: Add datapath")
Reported-by: Sukrut Bellary <sukrut.bellary@linux.com>
Closes: https://lore.kernel.org/all/20230610021200.377452-1-sukrut.bellary@linux.com/
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Reviewed-by: Carl Vanderlip <quic_carlv@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230614161528.11710-1-quic_jhugo@quicinc.com
Diffstat (limited to 'drivers/accel')
| -rw-r--r-- | drivers/accel/qaic/qaic_data.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/accel/qaic/qaic_data.c b/drivers/accel/qaic/qaic_data.c index e42c1f9ffff8..e9a1cb779b30 100644 --- a/drivers/accel/qaic/qaic_data.c +++ b/drivers/accel/qaic/qaic_data.c @@ -23,6 +23,7 @@ #include <linux/wait.h> #include <drm/drm_file.h> #include <drm/drm_gem.h> +#include <drm/drm_prime.h> #include <drm/drm_print.h> #include <uapi/drm/qaic_accel.h> @@ -616,8 +617,7 @@ static void qaic_free_object(struct drm_gem_object *obj) if (obj->import_attach) { /* DMABUF/PRIME Path */ - dma_buf_detach(obj->import_attach->dmabuf, obj->import_attach); - dma_buf_put(obj->import_attach->dmabuf); + drm_prime_gem_destroy(obj, NULL); } else { /* Private buffer allocation path */ qaic_free_sgt(bo->sgt); |