Description

In the Linux kernel, the following vulnerability has been resolved: media: camss: Clean up received buffers on failed start of streaming It is required to return the received buffers, if streaming can not be started. For instance media_pipeline_start() may fail with EPIPE, if a link validation between entities is not passed, and in such a case a user gets a kernel warning: WARNING: CPU: 1 PID: 520 at drivers/media/common/videobuf2/videobuf2-core.c:1592 vb2_start_streaming+0xec/0x160 <snip> Call trace: vb2_start_streaming+0xec/0x160 vb2_core_streamon+0x9c/0x1a0 vb2_ioctl_streamon+0x68/0xbc v4l_streamon+0x30/0x3c __video_do_ioctl+0x184/0x3e0 video_usercopy+0x37c/0x7b0 video_ioctl2+0x24/0x40 v4l2_ioctl+0x4c/0x70 The fix is to correct the error path in video_start_streaming() of camss.

References 8

• git.kernel.org https://git.kernel.org/stable/c/04c734c716a97f1493b1edac41316aaed1d2a9d9
• git.kernel.org https://git.kernel.org/stable/c/24df4fa3e795fb4b15fd4d3c036596e0978d265a
• git.kernel.org https://git.kernel.org/stable/c/3d5cab726e3b370fea1b6e67183f0e13c409ce5c
• git.kernel.org https://git.kernel.org/stable/c/75954cde8a5ca84003b24b6bf83197240935bd74
• git.kernel.org https://git.kernel.org/stable/c/c8f3582345e6a69da65ab588f7c4c2d1685b0e80
• git.kernel.org https://git.kernel.org/stable/c/d1c44928bb3ca0ec88e7ad5937a2a26a259aede6
• git.kernel.org https://git.kernel.org/stable/c/f05326a440dc31b91b688b2f3f15b7347894a50b
• git.kernel.org https://git.kernel.org/stable/c/fe443b3fe36cd23d4f5dc6d825d34322e7c89f0c

Remediation