I can reproduce this issue on Ubuntu 22.04 with the HWE kernel 6.8.0-90-generic.
Test environment: - Ubuntu 22.04.5 LTS (Jammy) - Kernel: 6.8.0-90-generic (HWE) - Architecture: amd64 - auditd enabled and running Audit rules used: /etc/audit/rules.d/audit-leak.rules: -D -b 8192 -f 1 -r 100 -a always,exit -F arch=b64 -S openat -S truncate -S ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=4294967295 -k access Reproduction steps: 1. Loaded the above rules with `augenrules --load` and verified with `auditctl -l`. 2. As an unprivileged user (UID >= 1000), executed: while :; do cat /root/secretfile > /dev/null; done 3. Monitored kernel memory with: watch -d -n 1 'grep -i SUnreclaim /proc/meminfo' and `slabtop -s c`. Observed behavior: - SUnreclaim increases steadily over time. - slabtop shows kmalloc-rnd-(*)-2k and skbuff_head_cache growing continuously. - Behavior matches the original report and the upstream stack trace involving audit_log_start() and __alloc_skb(). This confirms the memory leak on the 6.8.0 HWE kernel series. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2098730 Title: Kernel 6.8.0 memory leak To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2098730/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
