[Bug 204371] BUG kmalloc-4k (Tainted: G W ): Object padding overwritten
From: <hidden>
Date: 2019-08-01 12:50:17
https://bugzilla.kernel.org/show_bug.cgi?id=204371
--- Comment #5 from Erhard F. (erhard_f@mailbox.org) ---On Wed, 31 Jul 2019 12:09:54 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:
quoted hunk
https://bugzilla.kernel.org/show_bug.cgi?id=204371--- Comment #4 from mpe@ellerman.id.au ---quoted
I suspect proc_cgroup_show() is innocent and that perhaps bpf_prepare_filter() had a memory scribble. iirc there has been at least one recent pretty serious bpf fix applied recently. Can others please take a look?I haven't been able to reproduce this on a 64-bit or 32-bit powerpc machine here. But I don't run gentoo userspace, so I suspect I'm not tripping the same path at boot. I did run the seccomp selftest and that didn't trip it either. cheers
Doing some fiddling around on another bug (bug #204375), I noticed that I get this "kmalloc-4k (Tainted: G W ): Object padding overwritten" during boot only when I boot from my btrfs partition, but not from my other ext4 partition. The ext4 partition is not a clone, but pretty much the same stuff in the same versions. My btrfs root is mounted with 'lazytime,compress=zstd:1', systemd is 242. I built a 5.2.5 kernel on the Talos II with CONFIG_SLUB_DEBUG=y but here I don't hit the bug, even if I boot from a btrfs partition with the same settings. Have to test it on the G5 yet (kernel .config more similar to the G4 one than the Talos II one). -- You are receiving this mail because: You are on the CC list for the bug.