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| author | harperchen <harperchen1110@gmail.com> | 2023-03-02 13:39:05 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-03-19 22:55:33 +0100 |
| commit | 47e8b73bc35d7c54642f78e498697692f6358996 (patch) | |
| tree | 7cf3c7da143b75e4d156d8fe3c484a24179f3db2 /MAINTAINERS | |
| parent | media: amphion: decoder implement display delay enable (diff) | |
| download | linux-47e8b73bc35d7c54642f78e498697692f6358996.tar.xz linux-47e8b73bc35d7c54642f78e498697692f6358996.zip | |
media: cx23885: Fix a null-ptr-deref bug in buffer_prepare() and buffer_finish()
When the driver calls cx23885_risc_buffer() to prepare the buffer, the
function call dma_alloc_coherent may fail, resulting in a empty buffer
risc->cpu. Later when we free the buffer or access the buffer, null ptr
deref is triggered.
This bug is similar to the following one:
https://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71.
We believe the bug can be also dynamically triggered from user side.
Similarly, we fix this by checking the return value of cx23885_risc_buffer()
and the value of risc->cpu before buffer free.
Signed-off-by: harperchen <harperchen1110@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions