* [PATCH] drm/lima: fix a memleak in lima_heap_alloc
@ 2024-01-12 8:47 Zhipeng Lu
2024-01-16 1:24 ` Qiang Yu
0 siblings, 1 reply; 3+ messages in thread
From: Zhipeng Lu @ 2024-01-12 8:47 UTC (permalink / raw
To: alexious
Cc: Thomas Zimmermann, lima, dri-devel, linux-kernel, Maxime Ripard,
Vasily Khoruzhick, Qiang Yu
When lima_vm_map_bo fails, the resources need to be deallocated, or
there will be memleaks.
Fixes: 6aebc51d7aef ("drm/lima: support heap buffer creation")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
---
drivers/gpu/drm/lima/lima_gem.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
index 4f9736e5f929..824ed22141c7 100644
--- a/drivers/gpu/drm/lima/lima_gem.c
+++ b/drivers/gpu/drm/lima/lima_gem.c
@@ -92,8 +92,13 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
if (vm) {
ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
- if (ret)
+ if (ret) {
+ dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
+ sg_free_table(&sgt);
+ kfree(bo->base.sgt);
+ bo->base.sgt = NULL;
return ret;
+ }
}
bo->heap_size = new_size;
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/lima: fix a memleak in lima_heap_alloc
2024-01-12 8:47 [PATCH] drm/lima: fix a memleak in lima_heap_alloc Zhipeng Lu
@ 2024-01-16 1:24 ` Qiang Yu
2024-01-17 7:10 ` alexious
0 siblings, 1 reply; 3+ messages in thread
From: Qiang Yu @ 2024-01-16 1:24 UTC (permalink / raw
To: Zhipeng Lu
Cc: Thomas Zimmermann, lima, linux-kernel, Maxime Ripard,
Vasily Khoruzhick, dri-devel, Daniel Vetter, David Airlie
Thanks for the fix. As the error handling gets longer and duplicated,
could you rearrange them like the lima_gem_submit():
err_out2:
dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
err_out1:
kfree(bo->base.sgt);
bo->base.sgt = NULL;
err_out0:
sg_free_table(&sgt);
return ret.
Regards,
Qiang
On Fri, Jan 12, 2024 at 4:49 PM Zhipeng Lu <alexious@zju.edu.cn> wrote:
>
> When lima_vm_map_bo fails, the resources need to be deallocated, or
> there will be memleaks.
>
> Fixes: 6aebc51d7aef ("drm/lima: support heap buffer creation")
> Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
> ---
> drivers/gpu/drm/lima/lima_gem.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
> index 4f9736e5f929..824ed22141c7 100644
> --- a/drivers/gpu/drm/lima/lima_gem.c
> +++ b/drivers/gpu/drm/lima/lima_gem.c
> @@ -92,8 +92,13 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
>
> if (vm) {
> ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
> - if (ret)
> + if (ret) {
> + dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
> + sg_free_table(&sgt);
> + kfree(bo->base.sgt);
> + bo->base.sgt = NULL;
> return ret;
> + }
> }
>
> bo->heap_size = new_size;
> --
> 2.34.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Re: [PATCH] drm/lima: fix a memleak in lima_heap_alloc
2024-01-16 1:24 ` Qiang Yu
@ 2024-01-17 7:10 ` alexious
0 siblings, 0 replies; 3+ messages in thread
From: alexious @ 2024-01-17 7:10 UTC (permalink / raw
To: Qiang Yu
Cc: Thomas Zimmermann, lima, linux-kernel, Maxime Ripard,
Vasily Khoruzhick, dri-devel, Daniel Vetter, David Airlie
> Thanks for the fix. As the error handling gets longer and duplicated,
> could you rearrange them like the lima_gem_submit():
> err_out2:
> dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
> err_out1:
> kfree(bo->base.sgt);
> bo->base.sgt = NULL;
> err_out0:
> sg_free_table(&sgt);
> return ret.
>
> Regards,
> Qiang
>
Sure, I'll send a v2 version of this patch later following your advise.
Regards,
Zhipeng
> On Fri, Jan 12, 2024 at 4:49 PM Zhipeng Lu <alexious@zju.edu.cn> wrote:
> >
> > When lima_vm_map_bo fails, the resources need to be deallocated, or
> > there will be memleaks.
> >
> > Fixes: 6aebc51d7aef ("drm/lima: support heap buffer creation")
> > Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
> > ---
> > drivers/gpu/drm/lima/lima_gem.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
> > index 4f9736e5f929..824ed22141c7 100644
> > --- a/drivers/gpu/drm/lima/lima_gem.c
> > +++ b/drivers/gpu/drm/lima/lima_gem.c
> > @@ -92,8 +92,13 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
> >
> > if (vm) {
> > ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
> > - if (ret)
> > + if (ret) {
> > + dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);
> > + sg_free_table(&sgt);
> > + kfree(bo->base.sgt);
> > + bo->base.sgt = NULL;
> > return ret;
> > + }
> > }
> >
> > bo->heap_size = new_size;
> > --
> > 2.34.1
> >
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-01-12 8:47 [PATCH] drm/lima: fix a memleak in lima_heap_alloc Zhipeng Lu
2024-01-16 1:24 ` Qiang Yu
2024-01-17 7:10 ` alexious
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