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DescriptionMichal Sekletar
2020-01-29 16:48:12 UTC
Description of problem:
$subject
Version-Release number of selected component (if applicable):
systemd-239-18.el8_1.1
How reproducible:
always
Steps to Reproduce:
1) run the reproducer script
#!/usr/bin/python3
from systemd import journal
from os import listdir,readlink
from subprocess import run
def list_fds():
for fd in listdir("/proc/self/fd"):
try:
print(f" {fd} -> {readlink('/proc/self/fd/' + fd)}")
except FileNotFoundError as e:
pass
devnull = open("/dev/null", "w")
print("Rotate journal 3 times")
for i in range(3):
run(["journalctl", "--rotate"], stdout=devnull, stderr=devnull)
print("Open journal")
r = journal.Reader()
print("List fds")
list_fds()
print("Delete some journal files")
run(["journalctl", "--vacuum-files", "1"], stdout=devnull, stderr=devnull)
print("Process journal events")
r.process()
print("List fds")
list_fds()
Actual results:
Deleted files are opened by the client process.
Expected results:
No deleted files are opened.
Additional info:
Thanks to Ilan Green for bringing this issue to our attention.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Low: systemd security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2020:4553
Description of problem: $subject Version-Release number of selected component (if applicable): systemd-239-18.el8_1.1 How reproducible: always Steps to Reproduce: 1) run the reproducer script #!/usr/bin/python3 from systemd import journal from os import listdir,readlink from subprocess import run def list_fds(): for fd in listdir("/proc/self/fd"): try: print(f" {fd} -> {readlink('/proc/self/fd/' + fd)}") except FileNotFoundError as e: pass devnull = open("/dev/null", "w") print("Rotate journal 3 times") for i in range(3): run(["journalctl", "--rotate"], stdout=devnull, stderr=devnull) print("Open journal") r = journal.Reader() print("List fds") list_fds() print("Delete some journal files") run(["journalctl", "--vacuum-files", "1"], stdout=devnull, stderr=devnull) print("Process journal events") r.process() print("List fds") list_fds() Actual results: Deleted files are opened by the client process. Expected results: No deleted files are opened. Additional info: Thanks to Ilan Green for bringing this issue to our attention.