diff mbox series

[v1] drm/amd/display: Have risk for memory exhaustion

Message ID 20221104092931.20226-1-tanglongjun@kylinos.cn
State New
Headers
Series [v1] drm/amd/display: Have risk for memory exhaustion |

Commit Message

LongJun Tang Nov. 4, 2022, 9:29 a.m. UTC 
  In dcn*_clock_source_create when dcn*_clk_src_construct fails allocated
clk_src needs release. A local attack could use this to cause memory
exhaustion.

Signed-off-by: LongJun Tang <tanglongjun@kylinos.cn>
---
 drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c   | 1 +
 drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c | 1 +
 drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 1 +
 drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c | 1 +
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c   | 1 +
 drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c | 1 +
 drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c   | 1 +
 drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c | 1 +
 8 files changed, 8 insertions(+)

Comments

Alex Deucher Nov. 8, 2022, 4:03 p.m. UTC | #1 
On Fri, Nov 4, 2022 at 10:06 AM LongJun Tang <tanglongjun@kylinos.cn> wrote:
>
> In dcn*_clock_source_create when dcn*_clk_src_construct fails allocated
> clk_src needs release. A local attack could use this to cause memory
> exhaustion.
>
> Signed-off-by: LongJun Tang <tanglongjun@kylinos.cn>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c   | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c   | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c   | 1 +
>  drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c | 1 +
>  8 files changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
> index 020f512e9690..9b7e786bd4a2 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
> @@ -1323,6 +1323,7 @@ static struct clock_source *dcn30_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
> index f04595b750ab..7c1225046544 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
> @@ -1288,6 +1288,7 @@ static struct clock_source *dcn301_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> index b925b6ddde5a..73ae1146dad5 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> @@ -458,6 +458,7 @@ static struct clock_source *dcn302_clock_source_create(struct dc_context *ctx, s
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
> index 527d5c902878..0ea97eeec5a6 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
> @@ -425,6 +425,7 @@ static struct clock_source *dcn303_clock_source_create(struct dc_context *ctx, s
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
> index fddc21a5a04c..b02aa8874efb 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
> @@ -1625,6 +1625,7 @@ static struct clock_source *dcn31_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
> index 58746c437554..b2ff29e5f93c 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
> @@ -1623,6 +1623,7 @@ static struct clock_source *dcn31_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
> index a88dd7b3d1c1..71730b6666b0 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
> @@ -829,6 +829,7 @@ static struct clock_source *dcn32_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
> index 61087f2385a9..d3980fc243c9 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
> @@ -828,6 +828,7 @@ static struct clock_source *dcn321_clock_source_create(
>                 return &clk_src->base;
>         }
>
> +       kfree(clk_src);
>         BREAK_TO_DEBUGGER();
>         return NULL;
>  }
> --
> 2.17.1
>
>
> No virus found
>                 Checked by Hillstone Network AntiVirus
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index 020f512e9690..9b7e786bd4a2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -1323,6 +1323,7 @@  static struct clock_source *dcn30_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
index f04595b750ab..7c1225046544 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
@@ -1288,6 +1288,7 @@  static struct clock_source *dcn301_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
index b925b6ddde5a..73ae1146dad5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
@@ -458,6 +458,7 @@  static struct clock_source *dcn302_clock_source_create(struct dc_context *ctx, s
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
index 527d5c902878..0ea97eeec5a6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
@@ -425,6 +425,7 @@  static struct clock_source *dcn303_clock_source_create(struct dc_context *ctx, s
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
index fddc21a5a04c..b02aa8874efb 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
@@ -1625,6 +1625,7 @@  static struct clock_source *dcn31_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
index 58746c437554..b2ff29e5f93c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
@@ -1623,6 +1623,7 @@  static struct clock_source *dcn31_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
index a88dd7b3d1c1..71730b6666b0 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
@@ -829,6 +829,7 @@  static struct clock_source *dcn32_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
index 61087f2385a9..d3980fc243c9 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
@@ -828,6 +828,7 @@  static struct clock_source *dcn321_clock_source_create(
 		return &clk_src->base;
 	}
 
+	kfree(clk_src);
 	BREAK_TO_DEBUGGER();
 	return NULL;
 }