Hello again,
I just pushed some more fixes to 6.18 git. This one should fix the NULL deref: commit f78b2c59e54a86b17127523e5a8a22a6e80beaea aci_data_structures: check for non-null device_p before using it for FD cache
The warning traces are harmless, but I will soon look into them again. Some kernel file systems do not get registered in RSBAC correctly, this should be located and fixed.
Your help is appreciated. :)
Amon.
Am 12.06.26 um 17:19 schrieb GOMEZ, Terence:
Hi,
Well, now I've got a lot of Oopses with kernel NULL pointer dereferences, which leads to CPU stalls. After a minute, there is a final Oops with a Kernel panic (not appearing in the logs), effectively stopping the boot. Note this is still the config without MAC.
Terence Gomez
Le ven. 12 juin 2026 à 11:27, Amon Ott via rsbac <rsbac@rsbac.org mailto:rsbac@rsbac.org> a écrit :
Hi, just pushed a set of fixes to 6.18, the last one adds extra checks to do_add_mount() and might help. Thanks again! Amon. Am 09.06.26 um 15:35 schrieb GOMEZ, Terence: > Sure, > > I took the same config as before, only disabling CONFIG_RSBAC_MAC in > the menuconfig. > I have similar results on the 2 machines : a kernel NULL pointer > dereference comes up, with a Oops, which then seems to cause a > deadlock. > Here are the boot logs. > > Le mer. 27 mai 2026 à 16:15, Amon Ott via rsbac <rsbac@rsbac.org <mailto:rsbac@rsbac.org> > <mailto:rsbac@rsbac.org <mailto:rsbac@rsbac.org>>> a écrit : > > > Hi Terence, > > > > I started looking into this problem, but have not found the reason yet. > > Since it seems to crash in the mostly obsolete MAC module code, could > > you please try without MAC? > > > > Amon. > > > > Am 22.05.26 um 15:02 schrieb GOMEZ, Terence: > > > > > Hi, > > > > > > With Jean-Marc Lacroix, we have been trying to enable more options > than the > > > default ones for the RSBAC kernel configuration. However, the > > > configuration we > > > have come up with does not always boot correctly depending on the > machine we > > > install the kernel on. All machines are based on Debian 13, and the > > > kernels were > > > launched in softmode, version 6.18.7. > > > > > > On the first machine, a Mac Book Pro 2011 (CPU : Intel Core i5-2415M) > > > with SysV > > > init and XFCE, the system comes up properly. > > > On the second one, a HP Z240 (CPU : Intel Xeon E3-1225) with > systemd, we > > > have > > > first tried the kernel on a Gnome install, where the boot ends up > with a > > > "kernel > > > NULL pointer dereference" and a kernel panic. On the same machine, > where we > > > reinstalled a non graphical system, the same kernel configuration still > > > produces > > > the dereference with multiple kernel oops. > > > On the third one, a Lenovo ThinkStation P520c (CPU : Intel Xeon > W-2102) with > > > systemd and no desktop environment, there also is a "kernel NULL > pointer > > > dereference" that stops the boot (and is not in the logs), but no > kernel > > > panic > > > is displayed. > > > > > > I've appended the config file along with the boot logs. > > > > > > Do you have any idea as to why these problems occur ? > > > > > > Regards, > > > > > > Terence Gomez > > > > > > Amon. > > Terence Gomez Amon.
Amon.