CVE: CVE-2025-40208
Published: 2025-11-12
Description: In the Linux kernel, the following vulnerability has been resolved:

media: iris: fix module removal if firmware download failed

Fix remove if firmware failed to load:
qcom-iris aa00000.video-codec: Direct firmware load for qcom/vpu/vpu33_p4.mbn failed with error -2
qcom-iris aa00000.video-codec: firmware download failed
qcom-iris aa00000.video-codec: core init failed

then:
$ echo aa00000.video-codec > /sys/bus/platform/drivers/qcom-iris/unbind

Triggers:
genpd genpd:1:aa00000.video-codec: Runtime PM usage count underflow!
------------[ cut here ]------------
video_cc_mvs0_clk already disabled
WARNING: drivers/clk/clk.c:1206 at clk_core_disable+0xa4/0xac, CPU#1: sh/542
<snip>
pc : clk_core_disable+0xa4/0xac
lr : clk_core_disable+0xa4/0xac
<snip>
Call trace:
 clk_core_disable+0xa4/0xac (P)
 clk_disable+0x30/0x4c
 iris_disable_unprepare_clock+0x20/0x48 [qcom_iris]
 iris_vpu_power_off_hw+0x48/0x58 [qcom_iris]
 iris_vpu33_power_off_hardware+0x44/0x230 [qcom_iris]
 iris_vpu_power_off+0x34/0x84 [qcom_iris]
 iris_core_deinit+0x44/0xc8 [qcom_iris]
 iris_remove+0x20/0x48 [qcom_iris]
 platform_remove+0x20/0x30
 device_remove+0x4c/0x80
<snip>
---[ end trace [PII_REDACTED] ]---
------------[ cut here ]------------
video_cc_mvs0_clk already unprepared
WARNING: drivers/clk/clk.c:1065 at clk_core_unprepare+0xf0/0x110, CPU#2: sh/542
<snip>
pc : clk_core_unprepare+0xf0/0x110
lr : clk_core_unprepare+0xf0/0x110
<snip>
Call trace:
 clk_core_unprepare+0xf0/0x110 (P)
 clk_unprepare+0x2c/0x44
 iris_disable_unprepare_clock+0x28/0x48 [qcom_iris]
 iris_vpu_power_off_hw+0x48/0x58 [qcom_iris]
 iris_vpu33_power_off_hardware+0x44/0x230 [qcom_iris]
 iris_vpu_power_off+0x34/0x84 [qcom_iris]
 iris_core_deinit+0x44/0xc8 [qcom_iris]
 iris_remove+0x20/0x48 [qcom_iris]
 platform_remove+0x20/0x30
 device_remove+0x4c/0x80
<snip>
---[ end trace [PII_REDACTED] ]---
genpd genpd:0:aa00000.video-codec: Runtime PM usage count underflow!
------------[ cut here ]------------
gcc_video_axi0_clk already disabled
WARNING: drivers/clk/clk.c:1206 at clk_core_disable+0xa4/0xac, CPU#4: sh/542
<snip>
pc : clk_core_disable+0xa4/0xac
lr : clk_core_disable+0xa4/0xac
<snip>
Call trace:
 clk_core_disable+0xa4/0xac (P)
 clk_disable+0x30/0x4c
 iris_disable_unprepare_clock+0x20/0x48 [qcom_iris]
 iris_vpu33_power_off_controller+0x17c/0x428 [qcom_iris]
 iris_vpu_power_off+0x48/0x84 [qcom_iris]
 iris_core_deinit+0x44/0xc8 [qcom_iris]
 iris_remove+0x20/0x48 [qcom_iris]
 platform_remove+0x20/0x30
 device_remove+0x4c/0x80
<snip>
------------[ cut here ]------------
gcc_video_axi0_clk already unprepared
WARNING: drivers/clk/clk.c:1065 at clk_core_unprepare+0xf0/0x110, CPU#4: sh/542
<snip>
pc : clk_core_unprepare+0xf0/0x110
lr : clk_core_unprepare+0xf0/0x110
<snip>
Call trace:
 clk_core_unprepare+0xf0/0x110 (P)
 clk_unprepare+0x2c/0x44
 iris_disable_unprepare_clock+0x28/0x48 [qcom_iris]
 iris_vpu33_power_off_controller+0x17c/0x428 [qcom_iris]
 iris_vpu_power_off+0x48/0x84 [qcom_iris]
 iris_core_deinit+0x44/0xc8 [qcom_iris]
 iris_remove+0x20/0x48 [qcom_iris]
 platform_remove+0x20/0x30
 device_remove+0x4c/0x80
<snip>
---[ end trace [PII_REDACTED] ]---

Skip deinit if initialization never succeeded.
References: https://git.kernel.org/stable/c/7a0a77b936ff28f59c271172e81cefebf7b2b7a6; https://git.kernel.org/stable/c/fde38008fc4f43db8c[PII_REDACTED]df24b501543