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SubjectRe: [GIT PULL] Please pull NFS client changes for Linux 4.13
On Fri, Jul 14, 2017 at 10:25:43AM -0400, Dave Jones wrote:
> On Thu, Jul 13, 2017 at 05:16:24PM -0400, Anna Schumaker wrote:
> > Hi Linus,
> >
> > The following changes since commit 32c1431eea4881a6b17bd7c639315010aeefa452:
> >
> > Linux 4.12-rc5 (2017-06-11 16:48:20 -0700)
> >
> > are available in the git repository at:
> >
> > git://git.linux-nfs.org/projects/anna/linux-nfs.git tags/nfs-for-4.13-1
> >
> > for you to fetch changes up to b4f937cffa66b3d56eb8f586e620d0b223a281a3:
> >
> > NFS: Don't run wake_up_bit() when nobody is waiting... (2017-07-13 16:57:18 -0400)
>
> Since this landed, I'm seeing this during boot..
>
> ==================================================================
> BUG: KASAN: global-out-of-bounds in strscpy+0x4a/0x230
> Read of size 8 at addr ffffffffb4eeaf20 by task nfsd/688

Now that this one got fixed, this one fell out instead..
Will dig deeper tomorrow.

==================================================================
BUG: KASAN: global-out-of-bounds in call_start+0x93/0x100
Read of size 8 at addr ffffffff8d582588 by task kworker/0:1/22

CPU: 0 PID: 22 Comm: kworker/0:1 Not tainted 4.13.0-rc1-firewall+ #1
Workqueue: rpciod rpc_async_schedule
Call Trace:
dump_stack+0x68/0x94
print_address_description+0x2c/0x270
? call_start+0x93/0x100
kasan_report+0x239/0x350
__asan_load8+0x55/0x90
call_start+0x93/0x100
? rpc_default_callback+0x10/0x10
? rpc_default_callback+0x10/0x10
__rpc_execute+0x170/0x740
? rpc_wake_up_queued_task+0x50/0x50
? __lock_is_held+0x9f/0x110
rpc_async_schedule+0x12/0x20
process_one_work+0x4ba/0xb10
? process_one_work+0x401/0xb10
? pwq_dec_nr_in_flight+0x120/0x120
worker_thread+0x91/0x670
? __sched_text_start+0x8/0x8
kthread+0x1ab/0x200
? process_one_work+0xb10/0xb10
? __kthread_create_on_node+0x340/0x340
ret_from_fork+0x27/0x40

The buggy address belongs to the variable:
nfs_cb_version+0x8/0x740

Memory state around the buggy address:
ffffffff8d582480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff8d582500: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
>ffffffff8d582580: 00 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
^
ffffffff8d582600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff8d582680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

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