media: stm32-dcmipp: Return queued buffers on start_streaming() failure

Summary

In the Linux kernel, the following vulnerability has been resolved: media: stm32-dcmipp: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. dcmipp_bytecap_start_streaming() returned -EINVAL when the source subdevice could not be resolved from the media graph, before pm_runtime_resume_and_get() and media_pipeline_start() had been called. The remaining error paths already converge on the err_buffer_done label, which calls dcmipp_bytecap_all_buffers_done(..., VB2_BUF_STATE_QUEUED). Jump to that label directly: the intermediate err_pm_put / err_media_pipeline_stop labels are skipped, which is correct because nothing they would undo has happened yet. This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

Timeline

1. Aug 10, 2026, 12:00 PM UTCCVE published
2. Oct 21, 2026, 12:43 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 28e0f37722965fa150af31d82101c95fd21aef60 · fixed in c1800238a60b0584b1924f11ce38ec8aba533238; From 28e0f37722965fa150af31d82101c95fd21aef60 · fixed in ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f; From 28e0f37722965fa150af31d82101c95fd21aef60 · fixed in 624af2d4b5e9d3dd366538e4fb4a2a037792a7e3; From 28e0f37722965fa150af31d82101c95fd21aef60 · fixed in ffc8eec06378a340d708c889184ab3e14b57d540

• Linux Linux

  6.8

• KernelLinux

  From 6.8.0 · fixed in 6.12.114; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 4