Re: [lkp-robot] 486ad79630 [ 15.532543] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004

On Wed, May 2, 2018 at 10:44 PM, Andrew Morton
[off-list ref] wrote:

On Wed, 2 May 2018 21:58:25 -0700 Cong Wang [off-list ref] wrote:

quoted

On Wed, May 2, 2018 at 9:27 PM, Andrew Morton [off-list ref] wrote:

quoted

So it's saying that something which got committed into Linus's tree
after 4.17-rc3 has caused a NULL deref in
sock_release->llc_ui_release+0x3a/0xd0

Do you mean it contains commit 3a04ce7130a7
("llc: fix NULL pointer deref for SOCK_ZAPPED")?

That was in 4.17-rc3 so if this report's bisection is correct, that
patch is innocent.

origin.patch (http://ozlabs.org/~akpm/mmots/broken-out/origin.patch)
contains no changes to net/llc/af_llc.c so perhaps this crash is also
occurring in 4.17-rc3 base.

The commit I pointed out is supposed to fix this bug...

Please let me know if it doesn't.