[mythtv-commits] Ticket #13428: Valgrind error in avformatdecoder.cpp

[MythTV]

#13428: Valgrind error in avformatdecoder.cpp
------------------------------+-------------------------------------------
 Reporter:  Klaas de Waal     |          Owner:  Klaas de Waal <kdewaal@…>
     Type:  Patch - Bug Fix   |         Status:  closed
 Priority:  minor             |      Milestone:  31.0
Component:  MythTV - General  |        Version:  Master Head
 Severity:  low               |     Resolution:  fixed
 Keywords:  valgrind          |  Ticket locked:  0
------------------------------+-------------------------------------------
Changes (by Klaas de Waal <kdewaal@…>):

 * owner:  (none) => Klaas de Waal <kdewaal@…>
 * status:  new => closed
 * resolution:   => fixed


Comment:

 In [changeset:"eff14d9d1d3bce0def16d86a6756ad9a082015c4/mythtv"
 eff14d9d1/mythtv]:
 {{{
 #!CommitTicketReference repository="mythtv"
 revision="eff14d9d1d3bce0def16d86a6756ad9a082015c4"
 Uninitialized memory access in video codec probes.

 Valgrind detects uninitialized memory access in a memory buffer; the
 access is inside the buffer itself but beyond the size to which the buffer
 is written.
 This access is done by FFmpeg video type probing routines. This could be
 viewed as a bug in these routines but the MythTV code does reserve 32
 bytes of additional space for this so it is most likely a requirement for
 using these routines.  However, these 32 bytes are never initialized. This
 is solved by doing a "memset" to clear those 32 bytes.

 Fixes #13428
 }}}

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Ticket URL: <https://code.mythtv.org/trac/ticket/13428#comment:1>
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