lkml.org 
[lkml]   [2009]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (bf438284)

* Eric Dumazet <eric.dumazet@gmail.com> wrote:

> Ingo Molnar a ?crit :
> > FYI, we still have this one on latest mainline:
> >
> > [ 2.159614] NET: Registered protocol family 16
> > [ 2.163109] initcall netlink_proto_init+0x0/0x1b0 returned 0 after 5859 usecs
> > [ 2.164008] WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (bf438284)
> > [ 2.165006] 0100000002000000000000000000000000000000ad4eaddeffffffffffffffff
> > [ 2.172006] i i i i i i u u i i i i i i i i i i i i i i i i i i i i i i i i
> > [ 2.179005] ^
> > [ 2.180005]
> > [ 2.181008] Pid: 1, comm: swapper Not tainted (2.6.31-tip-02389-gc9f313c-dirty #151)
> > [ 2.182006] EIP: 0060:[<815a8101>] EFLAGS: 00010282 CPU: 0
> > [ 2.183009] EIP is at sock_init_data+0xe1/0x210
> > [ 2.184006] EAX: 0001b000 EBX: bf855938 ECX: 8233b614 EDX: 819ac7bf
> > [ 2.185006] ESI: bf855800 EDI: bf438280 EBP: bf867f10 ESP: 81b3afcc
> > [ 2.186006] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> > [ 2.187006] CR0: 8005003b CR2: bf83bdf0 CR3: 01b2c000 CR4: 000006d0
> > [ 2.188006] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> > [ 2.189006] DR6: ffff4ff0 DR7: 00000400
> > [ 2.190005] [<815d82b5>] __netlink_create+0x35/0xa0
> > [ 2.192005] [<815dabaa>] netlink_kernel_create+0x5a/0x150
> > [ 2.194004] [<815bc8ee>] rtnetlink_net_init+0x1e/0x40
> > [ 2.196005] [<815af381>] register_pernet_operations+0x11/0x30
> > [ 2.198004] [<815af4be>] register_pernet_subsys+0x1e/0x30
> > [ 2.200004] [<81adb49c>] rtnetlink_init+0x4c/0x100
> > [ 2.202004] [<81adbfe5>] netlink_proto_init+0x105/0x1b0
> > [ 2.204004] [<81001127>] do_one_initcall+0x27/0x190
> > [ 2.206004] [<81a9f567>] do_initcalls+0x27/0x40
> > [ 2.208004] [<81a9f5a6>] do_basic_setup+0x26/0x30
> > [ 2.210004] [<81a9f907>] kernel_init+0x57/0xa0
> > [ 2.212004] [<81004867>] kernel_thread_helper+0x7/0x30
> > [ 2.214004] [<ffffffff>] 0xffffffff
> > [ 2.216021] calling bdi_class_init+0x0/0x30 @ 1
> > [ 2.217015] device class 'bdi': registering
> > [ 2.218702] initcall bdi_class_init+0x0/0x30 returned 0 after 976 usecs
> > [ 2.219041] calling kobject_uevent_init+0x0/0x50 @ 1
> >
> > config attached.
> >
> > Ingo
> >
>
> I thought this was already discussed and fixed somehow ?

yes, it looked familar.

> Either we add kmemcheck annotations, or we switch sock->type from short
> to int to avoid the hole, and possibly to speedup things...
>
> [PATCH] net: kmemcheck annotation in struct socket
>
> struct socket has a 16 bit hole that triggers kmemcheck warnings.
>
> As suggested by Ingo, use kmemcheck annotations
>
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
> ---
> include/linux/net.h | 5 +++++
> net/socket.c | 1 +
> 2 files changed, 6 insertions(+)

Acked-by: Ingo Molnar <mingo@elte.hu>

Ingo


\
 
 \ /
  Last update: 2009-09-15 11:37    [from the cache]
©2003-2011 Jasper Spaans