Mercurial > hg > nginx-quic
annotate docs/xslt/changes.xslt @ 7629:f47f7d3d1bfa
Mp4: fixed possible chunk offset overflow.
In "co64" atom chunk start offset is a 64-bit unsigned integer. When trimming
the "mdat" atom, chunk offsets are casted to off_t values which are typically
64-bit signed integers. A specially crafted mp4 file with huge chunk offsets
may lead to off_t overflow and result in negative trim boundaries.
The consequences of the overflow are:
- Incorrect Content-Length header value in the response.
- Negative left boundary of the response file buffer holding the trimmed "mdat".
This leads to pread()/sendfile() errors followed by closing the client
connection.
On rare systems where off_t is a 32-bit integer, this scenario is also feasible
with the "stco" atom.
The fix is to add checks which make sure data chunks referenced by each track
are within the mp4 file boundaries. Additionally a few more checks are added to
ensure mp4 file consistency and log errors.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 26 Feb 2020 15:10:46 +0300 |
parents | b7e02f47a339 |
children |
rev | line source |
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450 | 1 <?xml version="1.0" encoding="utf-8"?> |
2 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> | |
3 | |
5586 | 4 <xsl:output method="text"/> |
4014 | 5 |
5586 | 6 <xsl:param select="'en'" name="lang"/> |
7 <xsl:param select="'../xml/change_log_conf.xml'" name="configuration"/> | |
4014 | 8 |
5586 | 9 <xsl:variable select="document($configuration)/configuration" name="conf"/> |
10 <xsl:variable select="$conf/start" name="start"/> | |
11 <xsl:variable select="$conf/indent" name="indent"/> | |
12 <xsl:variable select="$conf/length" name="max"/> | |
13 <xsl:variable name="br"><br></xsl:variable> | |
4014 | 14 |
15 | |
5586 | 16 <xsl:template match="/"> <xsl:apply-templates select="change_log"/> </xsl:template> |
17 <xsl:template match="change_log"> <xsl:apply-templates select="changes"/> </xsl:template> | |
4014 | 18 |
19 | |
5586 | 20 <xsl:template match="changes"> |
21 <xsl:text> </xsl:text> | |
450 | 22 |
5586 | 23 <xsl:value-of select="substring(concat($conf/changes[@lang=$lang]/title, |
24 //change_log/@title, | |
25 ' ', @ver, | |
26 ' '), | |
27 1, $conf/changes[@lang=$lang]/length)"/> | |
450 | 28 |
6915
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Docs: changes.xslt regenerated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
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29 <xsl:if test="$lang='ru'"> |
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Docs: changes.xslt regenerated.
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parents:
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30 <xsl:value-of select="substring(@date, 9, 2)"/> |
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parents:
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31 <xsl:text>.</xsl:text> |
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parents:
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32 <xsl:value-of select="substring(@date, 6, 2)"/> |
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parents:
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33 <xsl:text>.</xsl:text> |
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parents:
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34 <xsl:value-of select="substring(@date, 1, 4)"/> |
b7e02f47a339
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
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35 </xsl:if> |
4014 | 36 |
5586 | 37 <xsl:if test="$lang='en'"> |
6915
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Maxim Dounin <mdounin@mdounin.ru>
parents:
5586
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changeset
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38 <xsl:value-of select="substring(@date, 9, 2)"/> |
5586 | 39 <xsl:value-of select="$conf/changes[@lang=$lang]/month[number(substring(current()/@date, |
6915
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
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40 6, 2))]"/> |
b7e02f47a339
Docs: changes.xslt regenerated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5586
diff
changeset
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41 <xsl:value-of select="substring(@date, 1, 4)"/> |
5586 | 42 </xsl:if> |
450 | 43 |
5586 | 44 <xsl:text> </xsl:text> |
45 | |
46 <xsl:apply-templates select="change"/> | |
450 | 47 |
5586 | 48 <xsl:text> </xsl:text> |
49 </xsl:template> | |
4014 | 50 |
450 | 51 |
5586 | 52 <xsl:template match="change"> |
53 <xsl:variable select="$conf/changes[@lang=$lang]/*[local-name(.)=current()/@type]" name="prefix"/> | |
450 | 54 |
5586 | 55 <xsl:variable name="postfix"> <xsl:if test="$prefix"> <xsl:text>: </xsl:text> </xsl:if> </xsl:variable> |
56 | |
57 <xsl:apply-templates select="para[@lang=$lang]"><xsl:with-param select="concat($start, $prefix, $postfix)" name="prefix"/></xsl:apply-templates> | |
58 </xsl:template> | |
450 | 59 |
4014 | 60 |
5586 | 61 <xsl:template name="para" match="para"><xsl:param name="prefix"/> |
62 <xsl:variable name="text"> <xsl:apply-templates/> </xsl:variable> | |
450 | 63 |
5586 | 64 <xsl:text> </xsl:text> |
450 | 65 |
5586 | 66 <xsl:call-template name="wrap"><xsl:with-param select="normalize-space($text)" name="text"/><xsl:with-param name="prefix"> <xsl:choose><xsl:when test="position() = 1"> <xsl:value-of select="$prefix"/> </xsl:when><xsl:otherwise> <xsl:value-of select="$indent"/> </xsl:otherwise></xsl:choose> </xsl:with-param></xsl:call-template></xsl:template> |
67 | |
4014 | 68 |
5586 | 69 <xsl:template name="wrap"><xsl:param name="text"/><xsl:param name="prefix"/> |
70 <xsl:if test="$text"> | |
71 <xsl:variable name="offset"> | |
450 | 72 <xsl:choose> |
5586 | 73 <xsl:when test="starts-with($text, concat($br, ' '))"> |
74 <xsl:value-of select="string-length($br) + 2"/> | |
75 </xsl:when> | |
76 <xsl:when test="starts-with($text, $br)"> | |
77 <xsl:value-of select="string-length($br) + 1"/> | |
78 </xsl:when> | |
79 <xsl:otherwise> | |
80 1 | |
81 </xsl:otherwise> | |
450 | 82 </xsl:choose> |
5586 | 83 </xsl:variable> |
4014 | 84 |
5586 | 85 <xsl:variable name="length"> |
86 <xsl:call-template name="length"><xsl:with-param select="substring($text, $offset)" name="text"/><xsl:with-param select="string-length($prefix)" name="prefix"/><xsl:with-param select="$max" name="length"/></xsl:call-template></xsl:variable> | |
87 | |
88 <xsl:value-of select="$prefix"/> | |
4014 | 89 |
5586 | 90 <xsl:value-of select="normalize-space(translate(substring($text, $offset, $length), |
91 ' ', ' '))"/> | |
450 | 92 |
5586 | 93 <xsl:text> </xsl:text> |
450 | 94 |
5586 | 95 <xsl:call-template name="wrap"><xsl:with-param select="substring($text, $length + $offset)" name="text"/><xsl:with-param select="$indent" name="prefix"/></xsl:call-template></xsl:if> |
96 </xsl:template> | |
450 | 97 |
5586 | 98 |
99 <xsl:template name="length"><xsl:param name="text"/><xsl:param name="prefix"/><xsl:param name="length"/> | |
100 <xsl:variable select="substring-before(substring($text, 1, | |
101 $length - $prefix + string-length($br)), | |
102 $br)" name="break"/> | |
4014 | 103 |
5586 | 104 <xsl:choose> |
105 <xsl:when test="$break"> <xsl:value-of select="string-length($break)"/> </xsl:when> | |
4014 | 106 |
5586 | 107 <xsl:when test="$length = 0"> <xsl:value-of select="$max - $prefix"/> </xsl:when> |
108 | |
109 <xsl:when test="string-length($text) + $prefix <= $length"> | |
450 | 110 <xsl:value-of select="$length - $prefix"/> |
5586 | 111 </xsl:when> |
112 | |
113 <xsl:when test="substring($text, $length - $prefix + 1, 1) = ' '"> | |
4024 | 114 <xsl:value-of select="$length - $prefix + 1"/> |
5586 | 115 </xsl:when> |
4024 | 116 |
5586 | 117 <xsl:otherwise> |
118 <xsl:call-template name="length"><xsl:with-param select="$text" name="text"/><xsl:with-param select="$prefix" name="prefix"/><xsl:with-param select="$length - 1" name="length"/></xsl:call-template></xsl:otherwise> | |
119 </xsl:choose> | |
120 </xsl:template> | |
450 | 121 |
4014 | 122 |
5586 | 123 <xsl:template match="at">@</xsl:template> |
124 <xsl:template match="br"> <xsl:value-of select="$br"/> </xsl:template> | |
125 <xsl:template match="nobr"> <xsl:value-of select="translate(., ' ', ' ')"/> </xsl:template> | |
4014 | 126 |
127 | |
128 </xsl:stylesheet> |