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msgstore/znclog: fix panic on malformed input line

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If the line is "[01:02:03]" without a trailing space, we trip on
a "slice bounds out of range" panic.

Closes: https://todo.sr.ht/~emersion/soju/214
This commit is contained in:
Simon Ser 2023-05-23 23:08:44 +02:00
parent fa33ce986c
commit 2b2a2fd479
1 changed files with 4 additions and 2 deletions
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6
msgstore/znclog/reader.go
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@ -11,13 +11,15 @@ import (
"git.sr.ht/~emersion/soju/xirc"
)
var timestampPrefixLen = len("[01:02:03] ")
func UnmarshalLine(line string, user *database.User, network *database.Network, entity string, ref time.Time, events bool) (*irc.Message, time.Time, error) {
var hour, minute, second int
_, err := fmt.Sscanf(line, "[%02d:%02d:%02d] ", &hour, &minute, &second)
if err != nil {
if err != nil || len(line) < timestampPrefixLen {
return nil, time.Time{}, fmt.Errorf("malformed timestamp prefix: %v", err)
}
line = line[11:]
line = line[timestampPrefixLen:]
var cmd string
var prefix *irc.Prefix