<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<p><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Aptos;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times
New Roman";
mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA">Please change this also instead
of </span><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Aptos;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times
New Roman";
mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA"><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Aptos;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times
New Roman";
mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA">'goto free_fence_drv'</span>
just return err.<br>
</span></p>
<p><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Aptos;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times
New Roman";
mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA"> fence_drv =
kzalloc(sizeof(*fence_drv), GFP_KERNEL);<br>
if (!fence_drv) {<br>
DRM_ERROR("Failed to allocate memory for fence
driver\n");<br>
r = -ENOMEM;<br>
goto free_fence_drv; // this should be replace
by return.<br>
}<br>
<br>
</span></p>
<p><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Aptos;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times
New Roman";
mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA">~arvind<br>
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<div class="moz-cite-prefix">On 4/10/2025 9:54 PM, Dan Carpenter
wrote:<br>
</div>
<blockquote type="cite" cite="mid:5ff4d367-b5bd-40ae-9529-56d08ea6c1d0@stanley.mountain">
<pre class="moz-quote-pre" wrap="">The goto frees "fence_drv" so this is a double free bug. There is no
need to call amdgpu_seq64_free(adev, fence_drv->va) since the seq64
allocation failed so change the goto to goto free_fence_drv. Also
propagate the error code from amdgpu_seq64_alloc() instead of hard coding
it to -ENOMEM.
Fixes: e7cf21fbb277 ("drm/amdgpu: Few optimization and fixes for userq fence driver")
Signed-off-by: Dan Carpenter <a class="moz-txt-link-rfc2396E" href="mailto:dan.carpenter@linaro.org"><dan.carpenter@linaro.org></a>
---
---
drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
index a4953d668972..b012fece91e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
@@ -84,11 +84,8 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device *adev,
/* Acquire seq64 memory */
r = amdgpu_seq64_alloc(adev, &fence_drv->va, &fence_drv->gpu_addr,
&fence_drv->cpu_addr);
- if (r) {
- kfree(fence_drv);
- r = -ENOMEM;
- goto free_seq64;
- }
+ if (r)
+ goto free_fence_drv;
memset(fence_drv->cpu_addr, 0, sizeof(u64));
</pre>
</blockquote>
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