On 24.03.21 09:28, Christoph Hellwig wrote:
On Tue, Mar 23, 2021 at 11:17:41PM +0100, Frank Scheiner wrote:

...is broken on my T1000.

As I don't know how big attachments can be on this list, I put the logs
on pastebin.

A log for 028abd9222df is here:


Just do confirm:  in this tree line 304 in mm/slub.c is this BUG_ON:

        BUG_ON(object == fp); /* naive detection of double free or corruption */

which would mean we have a double free.  In that case it would be
interesting which call to kfree this is, which could be done by
calling gdb on vmlinux and then typing;

l *(sys_mount+0x114/0x1e0)

Not that a double free caused by this conversion makes any sense to me..

Sorry, but I can't install `gdb` on my T1000 ATM, because it depends on
"libpython3.8" for sparc64 (see [1]) and "libpython3.9" for the other
architectures, but "libpython3.8" is actually not available for sparc64,
"libpython3.9" is available for sparc64 though:

root@t1000:~# apt install gdb
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 gdb : Depends: libpython3.8 (>= 3.8.2) but it is not installable
       Recommends: libc-dbg
E: Unable to correct problems, you have held broken packages.

[1]: https://packages.debian.org/sid/gdb

Something wrong with the dependencies. Any suggestions?


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