Re: [llc_ui_release] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004

From: Fengguang Wu
Date: Sun Apr 29 2018 - 08:16:43 EST


On Sun, Apr 29, 2018 at 03:30:48AM +0000, Linus Torvalds wrote:
On Sat, Apr 28, 2018 at 7:12 PM Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote:

FYI this happens in mainline kernel 4.17.0-rc2.
It looks like a new regression.

It occurs in 5 out of 5 boots.

[main] 375 sockets created based on info from socket cachefile.
[main] Generating file descriptors
[main] Added 83 filenames from /dev
udevd[507]: failed to execute '/sbin/modprobe' '/sbin/modprobe -bv
platform:regulatory': No such file or directory
[ 372.057947] caif:caif_disconnect_client(): nothing to disconnect
[ 372.082415] BUG: unable to handle kernel NULL pointer dereference at
0000000000000004

I think this is fixed by commit 3a04ce7130a7 ("llc: fix NULL pointer deref
for SOCK_ZAPPED")

Confirmed. Sorry for the late report!

Regards,
Fengguang