CVE-2025-68175

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: nxp: imx8-isi: Fix streaming cleanup on release<br /> <br /> The current implementation unconditionally calls<br /> mxc_isi_video_cleanup_streaming() in mxc_isi_video_release(). This can<br /> lead to situations where any release call (like from a simple<br /> "v4l2-ctl -l") may release a currently streaming queue when called on<br /> such a device.<br /> <br /> This is reproducible on an i.MX8MP board by streaming from an ISI<br /> capture device using gstreamer:<br /> <br /> gst-launch-1.0 -v v4l2src device=/dev/videoX ! \<br /> video/x-raw,format=GRAY8,width=1280,height=800,framerate=1/120 ! \<br /> fakesink<br /> <br /> While this stream is running, querying the caps of the same device<br /> provokes the error state:<br /> <br /> v4l2-ctl -l -d /dev/videoX<br /> <br /> This results in the following trace:<br /> <br /> [ 155.452152] ------------[ cut here ]------------<br /> [ 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]<br /> [ 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<br /> [ 157.053499] CPU: 0 UID: 0 PID: 1708 Comm: python3 Not tainted 6.15.4-00114-g1f61ca5cad76 #1 PREEMPT<br /> [ 157.064369] Hardware name: imx8mp_board_01 (DT)<br /> [ 157.068205] pstate: 400000c5 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> [ 157.075169] pc : mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi]<br /> [ 157.081195] lr : mxc_isi_pipe_irq_handler+0x38/0x1b0 [imx8_isi]<br /> [ 157.087126] sp : ffff800080003ee0<br /> [ 157.090438] x29: ffff800080003ee0 x28: ffff0000c3688000 x27: 0000000000000000<br /> [ 157.097580] x26: 0000000000000000 x25: ffff0000c1e7ac00 x24: ffff800081b5ad50<br /> [ 157.104723] x23: 00000000000000d1 x22: 0000000000000000 x21: ffff0000c25e4000<br /> [ 157.111866] x20: 0000000060000200 x19: ffff80007a0608d0 x18: 0000000000000000<br /> [ 157.119008] x17: ffff80006a4e3000 x16: ffff800080000000 x15: 0000000000000000<br /> [ 157.126146] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000<br /> [ 157.133287] x11: 0000000000000040 x10: ffff0000c01445f0 x9 : ffff80007a053a38<br /> [ 157.140425] x8 : ffff0000c04004b8 x7 : 0000000000000000 x6 : 0000000000000000<br /> [ 157.147567] x5 : ffff0000c0400490 x4 : ffff80006a4e3000 x3 : ffff0000c25e4000<br /> [ 157.154706] x2 : 0000000000000000 x1 : ffff8000825c0014 x0 : 0000000060000200<br /> [ 157.161850] Call trace:<br /> [ 157.164296] mxc_isi_pipe_irq_handler+0x19c/0x1b0 [imx8_isi] (P)<br /> [ 157.170319] __handle_irq_event_percpu+0x58/0x218<br /> [ 157.175029] handle_irq_event+0x54/0xb8<br /> [ 157.178867] handle_fasteoi_irq+0xac/0x248<br /> [ 157.182968] handle_irq_desc+0x48/0x68<br /> [ 157.186723] generic_handle_domain_irq+0x24/0x38<br /> [ 157.191346] gic_handle_irq+0x54/0x120<br /> [ 157.195098] call_on_irq_stack+0x24/0x30<br /> [ 157.199027] do_interrupt_handler+0x88/0x98<br /> [ 157.203212] el0_interrupt+0x44/0xc0<br /> [ 157.206792] __el0_irq_handler_common+0x18/0x28<br /> [ 157.211328] el0t_64_irq_handler+0x10/0x20<br /> [ 157.215429] el0t_64_irq+0x198/0x1a0<br /> [ 157.219009] ---[ end trace 0000000000000000 ]---<br /> <br /> Address this issue by moving the streaming preparation and cleanup to<br /> the vb2 .prepare_streaming() and .unprepare_streaming() operations. This<br /> also simplifies the driver by allowing direct usage of the<br /> vb2_ioctl_streamon() and vb2_ioctl_streamoff() helpers, and removal of<br /> the manual cleanup from mxc_isi_video_release().