Bug 16340

Summary: AB-INT PTEST: libarchive ptest failure: timeout in test_fuzz_iso9660
Product: [QA/Testing] Package Testing (ptest) Reporter: João Marcos Costa <joaomarcos.costa>
Component: ptestAssignee: Siva Balasubramanian <sivakumar.bs>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: Medium CC: JPEWhacker, mathieu.dubois-briand, sivakumar.bs, tim.orling
Version: unspecified   
Target Milestone: 6.1   
Hardware: x86   
OS: Multiple   
Whiteboard: AB-INT
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: Don't know

Description João Marcos Costa 2026-07-01 08:23:54 UTC 
https://autobuilder.yoctoproject.org/valkyrie/#/builders/61/builds/3890/steps/13/logs/stdio

155: test_fuzz_ar                                                    ok
156: test_fuzz_cab                                                   ok
157: test_fuzz_cpio                                                  ok
158: test_fuzz_iso9660                                               Timeout! System state:
Collected system state:
+ dmesg
[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x413fd0c1]
[    0.000000] Linux version 6.18.35-yocto-standard (oe-user@oe-host) (aarch64-poky-linux-gcc (GCC) 16.1.0, GNU ld (GNU Binutils) 2.46.1) #1 SMP PREEMPT Wed Jun 10 16:00:30 UTC 2026
[    0.000000] random: crng init done
[    0.000000] Machine model: linux,dummy-virt
[    0.000000] Memory limited to 1024MB
(...)

qemuarm64-ptest ubuntu2404-vk-arm1

Full logs at: https://valkyrie.yocto.io/pub/non-release/20260624-47/testresults/qemuarm64-ptest/libarchive.log
Comment 1 Tim Orling 2026-07-02 14:53:01 UTC 
Should investigate whether we should be running fuzzing tests? Perhaps the tests should be skipped.
Comment 2 Joshua Watt 2026-07-02 14:54:07 UTC 
It looks like libarchive has an environment variable that causes the test suite to skip fuzzing tests: SKIP_TEST_FUZZ

https://github.com/libarchive/libarchive/blob/0c856d3a8f23934e77deb22f4bfc1ac0650a0b04/libarchive/test/test_fuzz.c#L62
Comment 3 Siva Balasubramanian 2026-07-03 07:07:23 UTC 
Sent a patch implementing Joshua's suggestion (comment 2):

https://patchwork.yoctoproject.org/project/oe-core/patch/20260703070042.3221380-1-sivakumar.bs@gmail.com/

Sets SKIP_TEST_FUZZ=1 in run-ptest before invoking the test binaries.
The fuzz tests run 1000 randomised iterations per archive format and
are designed for dedicated fuzzing infrastructure, not routine ptest
runs - skipping them via this upstream-provided env var keeps the
remaining libarchive ptests (libarchive_test, bsdtar_test,
bsdcpio_test, bsdcat_test, bsdunzip_test) running as before.

Tested locally against libarchive 3.8.7: with SKIP_TEST_FUZZ=1 set,
test_fuzz_iso9660 reports "skipped" immediately instead of running the
fuzzing workload (verified by running the compiled test binary both
with and without the variable); the remaining tests continue to pass.