lkml.org 
[lkml]   [2014]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: perf_fuzzer: BUG in kfree() in ftrace_graph_exit_task
On Mon, 31 Mar 2014, Vince Weaver wrote:
>
> This turned up with the perf_fuzzer, haswell, 3.14.
>
> I'm not sure if this is related to the other object corruption bug I am
> seeing. The sympstoms are similar (BUG when dereferencing low invalid
> kernel address) but this time the hrtimer code is not involved at all.
>
> This isn't reproducible, that is if I re-run the fuzzer with the same
> random seed after reboot the bug doesn't trigger.
>
>
> [ 5498.573458] BUG: unable to handle kernel NULL pointer dereference at 000000000000006c
> [ 5498.585181] IP: [<ffffffff81189111>] kfree+0x91/0x220
> [ 5498.593887] PGD 0
> [ 5498.599365] Oops: 0000 [#1] SMP
> [ 5498.606127] Dumping ftrace buffer:
> [ 5498.612973] (ftrace buffer empty)
> [ 5498.619868] Modules linked in: nfsd auth_rpcgss .....
> [ 5498.720303] CPU: 1 PID: 13 Comm: ksoftirqd/1 Tainted: G W 3.14.0+ #14

It's already tainted with W, so there was a warning before that
crash. It would be interesting to see that as well.

Thanks,

tglx




\
 
 \ /
  Last update: 2014-03-31 19:21    [W:0.036 / U:1.876 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site