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Add more error checks to shadow log parsing

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i.e. Coverity warns about possible use of ftell() negative return value
This commit is contained in:
Jon Siwek 2020-07-10 11:19:37 -07:00
parent 39f549ed68
commit ba0ba7c684
3 changed files with 35 additions and 3 deletions
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6
CHANGES
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@ -1,4 +1,10 @@
3.2.0-dev.885 | 2020-07-10 11:20:41 -0700
* Add more error checks to shadow log parsing (Jon Siwek, Corelight)
i.e. Coverity warns about possible use of ftell() negative return value
3.2.0-dev.884 | 2020-07-09 14:09:58 -0700
* Add Supervisor::{stdout,stderr}_hook (Jon Siwek, Corelight)

2
VERSION
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@ -1 +1 @@
3.2.0-dev.884
3.2.0-dev.885

30
src/logging/writers/ascii/Ascii.cc
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@ -111,9 +111,35 @@ static std::optional<LeftoverLog> parse_shadow_log(const std::string& fname)
return rval;
}
fseek(sf_stream, 0, SEEK_END);
int res = fseek(sf_stream, 0, SEEK_END);
if ( res == -1 )
{
rval.error = fmt("Failed to fseek(SEEK_END) on %s: %s",
rval.shadow_filename.data(), strerror(errno));
fclose(sf_stream);
return rval;
}
auto sf_len = ftell(sf_stream);
fseek(sf_stream, 0, SEEK_SET);
if ( sf_len == -1 )
{
rval.error = fmt("Failed to ftell() on %s: %s",
rval.shadow_filename.data(), strerror(errno));
fclose(sf_stream);
return rval;
}
res = fseek(sf_stream, 0, SEEK_SET);
if ( res == -1 )
{
rval.error = fmt("Failed to fseek(SEEK_SET) on %s: %s",
rval.shadow_filename.data(), strerror(errno));
fclose(sf_stream);
return rval;
}
auto sf_content = std::make_unique<char[]>(sf_len);
auto bytes_read = fread(sf_content.get(), 1, sf_len, sf_stream);