184581fa4d
When a write request needs to allocate new clusters (or change the L2 bitmap of existing ones) a QCowL2Meta structure is created so the L2 metadata can be later updated and any copy-on-write can be performed if necessary. A write request can span a region consisting of an arbitrary combination of previously unallocated and allocated clusters, and if the unallocated ones can be put contiguous to the existing ones then QEMU will do so in order to minimize the number of write operations. In practice this means that a write request has not just one but a number of QCowL2Meta structures. All of them are added to the cluster_allocs list that is stored in BDRVQcow2State and is used to detect overlapping requests. After the write request finishes all its associated QCowL2Meta are removed from that list. calculate_l2_meta() takes care of creating and putting those structures in the list, and qcow2_handle_l2meta() takes care of removing them. The problem is that the error path in handle_alloc() also tries to remove an item in that list, a remnant from the time when this was handled there (that code would not even be correct anymore because it only removes one struct and not all the ones from the same write request). This can trigger a double removal of the same item from the list, causing a crash. This is not easy to reproduce in practice because it requires that do_alloc_cluster_offset() fails after a successful previous allocation during the same write request, but it can be reproduced with the included test case. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-Id: <3440a1c4d53c4fe48312b478c96accb338cbef7c.1599150873.git.berto@igalia.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
317 lines
5.1 KiB
Plaintext
317 lines
5.1 KiB
Plaintext
#
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# QA groups control file
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# Defines test groups
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#
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# Some notes about the groups:
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#
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# - do not start group names with a digit
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#
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# - quick : Tests in this group should finish within some few seconds.
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#
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# - img : Tests in this group can be used to excercise the qemu-img tool.
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#
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# - auto : Tests in this group are used during "make check" and should be
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# runnable in any case. That means they should run with every QEMU binary
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# (also non-x86), with every QEMU configuration (i.e. must not fail if
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# an optional feature is not compiled in - but reporting a "skip" is ok),
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# work at least with the qcow2 file format, work with all kind of host
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# filesystems and users (e.g. "nobody" or "root") and must not take too
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# much memory and disk space (since CI pipelines tend to fail otherwise).
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#
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#
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# test-group association ... one line per test
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#
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001 rw auto quick
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002 rw auto quick
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003 rw auto
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004 rw auto quick
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005 img auto quick
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# 006 was removed, do not reuse
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007 snapshot auto
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008 rw auto quick
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009 rw auto quick
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010 rw auto quick
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011 rw auto quick
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012 auto quick
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013 rw auto
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014 rw
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015 rw snapshot
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# 016 was removed, do not reuse
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017 rw backing auto quick
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018 rw backing auto quick
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019 rw backing auto quick
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020 rw backing auto quick
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021 io auto quick
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022 rw snapshot auto
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023 rw
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024 rw backing auto quick
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025 rw auto quick
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026 rw blkdbg
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027 rw auto quick
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028 rw backing quick
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029 rw auto quick
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030 rw auto backing
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031 rw auto quick
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032 rw auto quick
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033 rw auto quick
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034 rw auto backing quick
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035 rw auto quick
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036 rw auto quick
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037 rw auto backing quick
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038 rw auto backing quick
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039 rw auto quick
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040 rw auto
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041 rw auto backing
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042 rw auto quick
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043 rw auto backing
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044 rw
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045 rw quick
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046 rw auto aio quick
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047 rw auto quick
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048 img auto quick
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049 rw auto
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050 rw auto backing quick
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051 rw
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052 rw auto backing quick
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053 rw auto quick
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054 rw auto quick
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055 rw
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056 rw backing
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057 rw
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058 rw quick
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059 rw quick
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060 rw auto quick
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061 rw auto
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062 rw auto quick
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063 rw auto quick
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064 rw quick
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065 rw quick
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066 rw auto quick
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067 rw quick
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068 rw quick
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069 rw auto quick
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070 rw quick
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071 rw auto quick
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072 rw auto quick
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073 rw auto quick
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074 rw auto quick
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075 rw quick
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076 io
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077 rw quick
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078 rw quick
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079 rw auto
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080 rw auto
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081 rw quick
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082 rw quick
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083 rw
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084 img quick
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085 rw
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086 rw auto quick
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087 rw quick
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088 rw quick
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089 rw auto quick
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090 rw auto quick
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091 rw migration quick
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092 rw quick
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093 throttle
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094 rw quick
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095 rw quick
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096 rw quick
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097 rw auto backing
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098 rw auto backing quick
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099 rw auto quick
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# 100 was removed, do not reuse
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101 rw quick
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102 rw quick
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103 rw auto quick
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104 rw auto
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105 rw auto quick
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106 rw quick
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107 rw auto quick
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108 rw auto quick
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109 rw
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110 rw auto backing quick
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111 rw auto quick
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112 rw
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113 rw quick
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114 rw auto quick
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115 rw
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116 rw quick
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117 rw auto
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118 rw
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119 rw quick
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120 rw auto quick
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121 rw
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122 rw
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123 rw quick
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124 rw backing
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125 rw
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127 rw auto backing quick
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128 rw quick
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129 rw quick
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130 rw quick
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131 rw quick
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132 rw quick
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133 auto quick
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134 rw auto quick
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135 rw
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136 rw
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137 rw auto
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138 rw auto quick
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139 rw quick
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140 rw auto quick
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141 rw auto quick
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142
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143 auto quick
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144 rw quick
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145 quick
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146 quick
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147 img
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148 rw quick
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149 rw sudo
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150 rw auto quick
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151 rw
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152 rw quick
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153 rw quick
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154 rw auto backing quick
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155 rw
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156 rw auto quick
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157 quick
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158 rw auto quick
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159 rw auto quick
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160 rw quick
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161 rw auto quick
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162 quick
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163 rw
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165 rw quick
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169 rw migration
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170 rw auto quick
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171 rw quick
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172 auto
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173 rw
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174 auto
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175 quick
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176 rw auto backing
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177 rw auto quick
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178 img
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179 rw auto quick
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181 rw auto migration quick
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182 rw quick
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183 rw migration quick
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184 rw auto quick
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185 rw
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186 rw auto
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187 rw auto
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188 rw quick
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189 rw
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190 rw auto quick
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191 rw auto
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192 rw auto quick
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194 rw migration quick
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195 rw auto quick
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196 rw quick migration
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197 rw quick
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198 rw
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199 rw migration
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200 rw
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201 rw migration quick
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202 rw quick
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203 rw auto migration quick
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204 rw quick
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205 rw quick
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206 rw
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207 rw
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208 rw quick
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209 rw quick
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210 rw
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212 rw quick
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213 rw quick
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214 rw auto
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215 rw quick
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216 rw quick
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217 rw auto quick
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218 rw quick
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219 rw
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220 rw auto
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221 rw quick
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222 rw quick
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223 rw quick
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224 rw quick
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225 rw quick
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226 auto quick
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227 quick
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228 rw quick
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229 auto quick
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231 quick
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232 quick
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233 quick
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234 quick migration
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235 quick
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236 quick
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237 rw quick
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238 quick
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239 rw quick
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240 quick
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241 rw quick
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242 rw quick
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243 rw quick
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244 rw auto quick
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245 rw
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246 rw quick
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247 rw quick
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248 rw quick
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249 rw auto quick
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250 rw quick
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251 rw auto quick
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252 rw auto backing quick
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253 rw quick
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254 rw backing quick
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255 rw quick
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256 rw auto quick
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257 rw
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258 rw quick
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259 rw auto quick
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260 rw quick
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261 rw
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262 rw quick migration
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263 rw quick
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264 rw
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265 rw auto quick
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266 rw quick
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267 rw auto quick snapshot
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268 rw auto quick
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270 rw backing quick
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271 rw auto
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272 rw
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273 backing quick
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274 rw backing
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277 rw quick
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279 rw backing quick
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280 rw migration quick
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281 rw quick
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282 rw img quick
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283 auto quick
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284 rw
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286 rw quick
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287 auto quick
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288 quick
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289 rw quick
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290 rw auto quick
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291 rw quick
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292 rw auto quick
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293 rw
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294 rw quick
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295 rw
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296 rw
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297 meta
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299 auto quick
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300 migration
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301 backing quick
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302 quick
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303 rw quick
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304 rw quick
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305 rw quick
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