linux-cve-announce - CVE-2025-68175: media: nxp: imx8-isi: Fix streaming cleanup on release

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Message-ID: <2025121629-CVE-2025-68175-d545@gregkh>
Date: Tue, 16 Dec 2025 14:43:36 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68175: media: nxp: imx8-isi: Fix streaming cleanup on release

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

media: nxp: imx8-isi: Fix streaming cleanup on release

The current implementation unconditionally calls
mxc_isi_video_cleanup_streaming() in mxc_isi_video_release(). This can
lead to situations where any release call (like from a simple
"v4l2-ctl -l") may release a currently streaming queue when called on
such a device.

This is reproducible on an i.MX8MP board by streaming from an ISI
capture device using gstreamer:

	gst-launch-1.0 -v v4l2src device=/dev/videoX ! \
	    video/x-raw,format=GRAY8,width=1280,height=800,framerate=1/120 ! \
	    fakesink

While this stream is running, querying the caps of the same device
provokes the error state:

	v4l2-ctl -l -d /dev/videoX

This results in the following trace:

[  155.452152] ------------[ cut here ]------------
[  155.452163] WARNING: CPU: 0 PID: 1708 at drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c:713 mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi]
[  157.004248] Modules linked in: cfg80211 rpmsg_ctrl rpmsg_char rpmsg_tty virtio_rpmsg_bus rpmsg_ns rpmsg_core rfkill nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables mcp251x6
[  157.053499] CPU: 0 UID: 0 PID: 1708 Comm: python3 Not tainted 6.15.4-00114-g1f61ca5cad76 #1 PREEMPT
[  157.064369] Hardware name: imx8mp_board_01 (DT)
[  157.068205] pstate: 400000c5 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  157.075169] pc : mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi]
[  157.081195] lr : mxc_isi_pipe_irq_handler+0x38/0x1b0 [imx8_isi]
[  157.087126] sp : ffff800080003ee0
[  157.090438] x29: ffff800080003ee0 x28: ffff0000c3688000 x27: 0000000000000000
[  157.097580] x26: 0000000000000000 x25: ffff0000c1e7ac00 x24: ffff800081b5ad50
[  157.104723] x23: 00000000000000d1 x22: 0000000000000000 x21: ffff0000c25e4000
[  157.111866] x20: 0000000060000200 x19: ffff80007a0608d0 x18: 0000000000000000
[  157.119008] x17: ffff80006a4e3000 x16: ffff800080000000 x15: 0000000000000000
[  157.126146] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
[  157.133287] x11: 0000000000000040 x10: ffff0000c01445f0 x9 : ffff80007a053a38
[  157.140425] x8 : ffff0000c04004b8 x7 : 0000000000000000 x6 : 0000000000000000
[  157.147567] x5 : ffff0000c0400490 x4 : ffff80006a4e3000 x3 : ffff0000c25e4000
[  157.154706] x2 : 0000000000000000 x1 : ffff8000825c0014 x0 : 0000000060000200
[  157.161850] Call trace:
[  157.164296]  mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi] (P)
[  157.170319]  __handle_irq_event_percpu+0x58/0x218
[  157.175029]  handle_irq_event+0x54/0xb8
[  157.178867]  handle_fasteoi_irq+0xac/0x248
[  157.182968]  handle_irq_desc+0x48/0x68
[  157.186723]  generic_handle_domain_irq+0x24/0x38
[  157.191346]  gic_handle_irq+0x54/0x120
[  157.195098]  call_on_irq_stack+0x24/0x30
[  157.199027]  do_interrupt_handler+0x88/0x98
[  157.203212]  el0_interrupt+0x44/0xc0
[  157.206792]  __el0_irq_handler_common+0x18/0x28
[  157.211328]  el0t_64_irq_handler+0x10/0x20
[  157.215429]  el0t_64_irq+0x198/0x1a0
[  157.219009] ---[ end trace 0000000000000000 ]---

Address this issue by moving the streaming preparation and cleanup to
the vb2 .prepare_streaming() and .unprepare_streaming() operations. This
also simplifies the driver by allowing direct usage of the
vb2_ioctl_streamon() and vb2_ioctl_streamoff() helpers, and removal of
the manual cleanup from mxc_isi_video_release().

The Linux kernel CVE team has assigned CVE-2025-68175 to this issue.


Affected and fixed versions
===========================

	Fixed in 6.17.8 with commit 029914306b93b37c6e7060793d2b6f76b935cfa6
	Fixed in 6.18 with commit 47773031a148ad7973b809cc7723cba77eda2b42

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-68175
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/029914306b93b37c6e7060793d2b6f76b935cfa6
	https://git.kernel.org/stable/c/47773031a148ad7973b809cc7723cba77eda2b42