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Sur d’autres sites (14203)

  • avfilter/avfiltergraph : Fix use-after-free when inserting auto-converter

    8 octobre 2021, par Andreas Rheinhardt
    avfilter/avfiltergraph : Fix use-after-free when inserting auto-converter

    When inserting an auto-resampler, it may be that the configuration
    
of the filters that the auto-resampler is supposed to connect is
    
already partially merged, i.e. converter->inputs[0].incfg.foo and
    
converter->outputs[0].outcfg.foo (where foo is one of formats,
    
samplerates, channel_layouts) can coincide. Therefore merging
    
the converter filter's input link might modify the outcfg of the
    
converter' outlink. Yet the current code in avfiltergraph.c used
    
pointers from before merging the inlink for merging the outlink,
    
leading to a use-after-free in command lines like :
    
$ ffmpeg -f lavfi -i anullsrc=cl=stereo -lavfi channelsplit,axcorrelate -f null -
    
Fix this by not using outdated values when merging the outlink.
    

    This is a regression since 85a6404d7e6c759ddf71d6374812d7ff719728ec.
    

    Found-by : Paul B Mahol <onemda@gmail.com>
    
Reviewed-by : Paul B Mahol <onemda@gmail.com>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavfilter/avfiltergraph.c

  • lavd/avdevice : always free detected devices on error

    4 mars 2014, par Lukasz Marek
    lavd/avdevice : always free detected devices on error

    Signed-off-by : Lukasz Marek <lukasz.m.luki@gmail.com>
    • [DH] libavdevice/avdevice.c

  • avcodec/alacenc : Don't free unnecessarily

    13 septembre 2020, par Andreas Rheinhardt
    avcodec/alacenc : Don't free unnecessarily

    The init function of the ALAC encoder calls its own close function
    
if a call to ff_lpc_init() fails ; yet nothing has been allocated before
    
that point (except extradata which is freed generically) and ff_lpc_init()
    
can be expected to clean up after itself on error (the documentation does
    
not say anything to the contrary and the current implementation can only
    
fail if the only allocation fails, so there is nothing to clean up on
    
error anyway), so this is unnecessary.
    

    Reviewed-by : Paul B Mahol <onemda@gmail.com>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavcodec/alacenc.c

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