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fix: A possible crash when fi.Erasure.Distribution is empty (#10779)

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Harshavardhana 2020-10-28 19:24:01 -07:00 committed by GitHub
parent bfc36aed89
commit e0655e24f2
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2 changed files with 21 additions and 1 deletions
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17
cmd/erasure-healing-common.go
View File

@ -167,7 +167,14 @@ func disksWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetad
// consider the offline disks as consistent.
continue
}
if len(meta.Erasure.Distribution) != len(onlineDisks) {
// Erasure distribution seems to have lesser
// number of items than number of online disks.
inconsistent++
continue
}
if meta.Erasure.Distribution[i] != meta.Erasure.Index {
// Mismatch indexes with distribution order
inconsistent++
}
}
@ -193,6 +200,16 @@ func disksWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetad
if !meta.IsValid() {
continue
}
if len(meta.Erasure.Distribution) != len(onlineDisks) {
// Erasure distribution is not the same as onlineDisks
// attempt a fix if possible, assuming other entries
// might have the right erasure distribution.
partsMetadata[i] = FileInfo{}
dataErrs[i] = errFileCorrupt
continue
}
// Since erasure.Distribution is trustable we can fix the mismatching erasure.Index
if meta.Erasure.Distribution[i] != meta.Erasure.Index {
partsMetadata[i] = FileInfo{}

5
cmd/erasure-metadata.go
View File

@ -90,9 +90,12 @@ func (fi FileInfo) IsValid() bool {
}
dataBlocks := fi.Erasure.DataBlocks
parityBlocks := fi.Erasure.ParityBlocks
correctIndexes := (fi.Erasure.Index > 0 &&
fi.Erasure.Index <= dataBlocks+parityBlocks &&
len(fi.Erasure.Distribution) == (dataBlocks+parityBlocks))
return ((dataBlocks >= parityBlocks) &&
(dataBlocks != 0) && (parityBlocks != 0) &&
(fi.Erasure.Index > 0 && fi.Erasure.Distribution != nil))
correctIndexes)
}
// ToObjectInfo - Converts metadata to object info.