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scripting: no eval with negative key count

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Negative key count causes segfault in Lua functions.

Fixes #1842
Closes #1843
This commit is contained in:
Matt Stancliff 2014-06-28 22:20:44 -04:00 committed by antirez
parent 1a5e5b6bd4
commit f17f8521f0
2 changed files with 8 additions and 0 deletions
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3
src/scripting.c
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@ -910,6 +910,9 @@ void evalGenericCommand(redisClient *c, int evalsha) {
if (numkeys > (c->argc - 3)) {
addReplyError(c,"Number of keys can't be greater than number of args");
return;
} else if (numkeys < 0) {
addReplyError(c,"Number of keys can't be negative");
return;
}
/* We obtain the script SHA1, then check if this function is already

5
tests/unit/scripting.tcl
View File

@ -358,6 +358,11 @@ start_server {tags {"scripting"}} {
return redis.call("get", "key")
} 0
} {12039611435714932082}
test {Verify negative arg count is error instead of crash (issue #1842)} {
catch { r eval { return "hello" } -12 } e
set e
} {ERR Number of keys can't be negative}
}
# Start a new server since the last test in this stanza will kill the