Re: [LKP] 4ce5f9c9e7 [ 1.323881] WARNING: CPU: 0 PID: 1 at mm/slab_common.c:1031 kmalloc_slab

From: Eric W. Biederman
Date: Wed Oct 10 2018 - 18:08:21 EST

ebiederm@xxxxxxxxxxxx (Eric W. Biederman) writes:

> So I am flummoxed. I am reading through the code and I don't see
> anything that could trigger this, and when I ran the supplied reproducer
> it did not reproduce for me.

Even more so. With my tool chain the line that reports the failing
address is impossible.

[ 73.034423] RIP: 0010:copy_siginfo_from_user+0x4d/0xd0

With the supplied configureation my tool chain only has 0x30 bytes for
all of copy_siginfo_from_user. So I can't even begin to guess where
in that function things are failing.

Any additional information that you can provide would be a real help
in tracking down this strange failure.

Thank you,
Eric Biederman