Cloning for findutils, as find seems to be crashing in the same situation as du does. I tested it with findutils-4.6.0-14.fc27.x86_64. +++ This bug was initially created as a clone of Bug #1544392 +++ Description of problem: I have a directory with about 40000 subdirectories, each containing several small files and symlinks outside that directory. When copying the directory with cp -r and running du on the new directory to see how much data was already copied, du sometimes crashes. I have seen this with coreutils-8.27-17.fc27.x86_64 and coreutils-8.27-19.fc27.x86_64, but not coreutils-8.29-3.fc28.x86_64. Backtrace: #0 0x00007ffff6dc666b in raise () from /lib64/libc.so.6 #1 0x00007ffff6dc8381 in abort () from /lib64/libc.so.6 #2 0x000055555562762b in leave_dir (ent=ent@entry=0x5555558ef5f0, fts=<optimized out>, fts=<optimized out>) at ../lib/fts-cycle.c:136 #3 0x0000555555627b71 in fts_build (sp=sp@entry=0x55555589d510, type=type@entry=3) at ../lib/fts.c:1355 #4 0x000055555562899d in fts_read (sp=sp@entry=0x55555589d510) at ../lib/fts.c:931 #5 0x0000555555594017 in du_files (files=0x5555558867d0 <temp_argv>, bit_flags=280) at ../src/du.c:691 #6 single_binary_main_du (argc=<optimized out>, argv=<optimized out>) at ../src/du.c:1123 #7 0x0000555555564752 in launch_program (prog_name=<optimized out>, prog_argc=1, prog_argv=0x7fffffffd688) at ../src/coreutils.c:127 #8 0x0000555555564542 in launch_program (prog_argv=<optimized out>, prog_argc=1, prog_name=0x7fffffffda3b "du") at ../src/coreutils.c:195 #9 main (argc=<optimized out>, argv=0x7fffffffd678) at ../src/coreutils.c:177 --- Additional comment from Kamil Dudka on 2018-02-12 07:02:44 EST --- There are not many relevant changes in FTS between those releases of coreutils. Anyway, I have submitted a scratch build of f27 coreutils with f29 version of FTS: https://koji.fedoraproject.org/koji/taskinfo?taskID=24965509 Could you please give it a try in case it is something easy to test for you? --- Additional comment from Miroslav Lichvar on 2018-02-12 07:21:12 EST --- It doesn't seem to crash with du from the scratch build. --- Additional comment from Kamil Dudka on 2018-02-12 07:37:46 EST --- Not that I understand why, but I will submit it as an update anyway. Hopefully it will not come back again. Thank you for testing the scratch build! --- Additional comment from Kamil Dudka on 2018-02-12 07:47:17 EST --- Note that findutils shares the code in question with coreutils. If you were by any chance able to reproduce the crash in your environment with find(1), please create a separate bug for it and I will update the FTS code in findutils, too.
Thanks for the bug report! I will reuse the fix from the coreutils bug.
findutils-4.6.0-16.fc27 coreutils-8.27-20.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-89733ea3d9
coreutils-8.27-20.fc27, findutils-4.6.0-16.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-89733ea3d9
coreutils-8.27-20.fc27, findutils-4.6.0-16.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.