shaba/systemd-stable
1
1
Fork 0
mirror of https://github.com/systemd/systemd-stable.git synced 2025-01-08 21:17:47 +03:00
Code

fuzz-journal-stream: avoid assertion failure on samples which don't fit in pipe

Browse Source 
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11587.
We had a sample which was large enough that write(2) failed to push all the
data into the pipe, and an assert failed. The code could be changed to use
a loop, but then we'd need to interleave writes and sd_event_run (to process
the journal). I don't think the complexity is worth it — fuzzing works best
if the sample is not too huge anyway. So let's just reject samples above 64k,
and tell oss-fuzz about this limit.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-02-26 13:00:35 +01:00
parent d26eef9252
commit eafadd069c
2 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/fuzz/fuzz-journald-stream.c
View File

@ -15,7 +15,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
StdoutStream *stream;
int v;
if (size == 0)
if (size == 0 || size > 65536)
return 0;
if (!getenv("SYSTEMD_LOG_LEVEL"))

2
src/fuzz/fuzz-journald-stream.options Normal file
View File

@ -0,0 +1,2 @@
[libfuzzer]
max_len = 65536