From: Borislav Petkov <bp@amd64.org>
To: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Linux Edac Mailing List <linux-edac@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Doug Thompson <norsk5@yahoo.com>
Subject: Re: [EDAC PATCH v13 5/7] edac: rewrite edac_align_ptr()
Date: Wed, 18 Apr 2012 17:25:49 +0200 [thread overview]
Message-ID: <20120418152549.GG20813@aftab> (raw)
In-Reply-To: <20120418140640.GF20813@aftab>
On Wed, Apr 18, 2012 at 04:06:40PM +0200, Borislav Petkov wrote:
> Why increment *p here too - we're returning ptr below? Or are we keeping
> the alignment in the original pointer too? Why can't we pass the aligned
> pointer from the previous pass? I.e., do
>
> p = NULL;
> dev_ctl = edac_align_ptr(&p, sizeof(*dev_ctl), 1);
>
> and then do
>
> dev_inst = edac_align_ptr(&dev_ctl, sizeof(*dev_inst), nr_instances);
>
> In any case, this is not trivial so the function needs a bunch of comments.
And broken it is too:
[ 8.813572] BUG: unable to handle kernel NULL pointer dereference at 0000000000000740
[ 8.817562] IP: [<ffffffffa0001084>] edac_align_ptr+0x9/0x5d [edac_core]
[ 8.817562] PGD 4238d4067 PUD 4238d6067 PMD 0
[ 8.817562] Oops: 0000 [#1] SMP
[ 8.817562] CPU 0
[ 8.817562] Modules linked in: radeon(+) ttm amd64_edac_mod(+) drm_kms_helper e1000e hwmon backlight ohci_hcd cfbcopyarea cfbimgblt cfbfillrect ehci_hcd edac_core
[ 8.817562]
[ 8.817562] Pid: 1557, comm: work_for_cpu Not tainted 3.3.0+ #6 AMD
[ 8.817562] RIP: 0010:[<ffffffffa0001084>] [<ffffffffa0001084>] edac_align_ptr+0x9/0x5d [edac_core]
[ 8.817562] RSP: 0018:ffff880425213d60 EFLAGS: 00010246
[ 8.817562] RAX: 00000000000005c0 RBX: 0000000000000002 RCX: 00000000000005c0
[ 8.817562] RDX: 0000000000000010 RSI: 0000000000000044 RDI: 0000000000000740
[ 8.817562] RBP: ffff880425213d60 R08: 0000000000000008 R09: 0000000000000740
[ 8.817562] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008
[ 8.817562] R13: 0000000000000000 R14: ffff880425213d98 R15: 0000000000000010
[ 8.817562] FS: 00007f0f12ed2740(0000) GS:ffff880427c00000(0000) knlGS:0000000000000000
[ 8.817562] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 8.817562] CR2: 0000000000000740 CR3: 00000004238d1000 CR4: 00000000000006f0
[ 8.817562] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 8.817562] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 8.817562] Process work_for_cpu (pid: 1557, threadinfo ffff880425212000, task ffff880425bed9c0)
[ 8.817562] Stack:
[ 8.817562] ffff880425213dd0 ffffffffa0001157 ffff880425213d80 ffffffff00000000
[ 8.817562] 00000000000005c0 00000000000001c0 0000000000000088 0000000000000740
[ 8.817562] 0000000000000000 ffff880425d91000 0000000000000170 ffff880425ef2c90
[ 8.817562] Call Trace:
[ 8.817562] [<ffffffffa0001157>] edac_mc_alloc+0x7f/0x1b9 [edac_core]
[ 8.817562] [<ffffffffa005bdef>] amd64_probe_one_instance+0xf8b/0x149a [amd64_edac_mod]
[ 8.817562] [<ffffffff811e7aac>] local_pci_probe+0x4d/0x96
[ 8.817562] [<ffffffff81042ecf>] ? cwq_dec_nr_in_flight+0x7b/0x7b
[ 8.817562] [<ffffffff81042ee7>] do_work_for_cpu+0x18/0x2a
[ 8.817562] [<ffffffff81048d0d>] kthread+0x89/0x91
[ 8.817562] [<ffffffff8144ca64>] kernel_thread_helper+0x4/0x10
[ 8.817562] [<ffffffff81444f4a>] ? retint_restore_args+0xe/0xe
[ 8.817562] [<ffffffff81048c84>] ? kthread_freezable_should_stop+0x57/0x57
[ 8.817562] [<ffffffff8144ca60>] ? gs_change+0xb/0xb
[ 8.817562] Code: 5e 00 a0 31 c0 48 89 d6 e8 36 12 44 e1 48 89 df e8 c5 1a 00 00 48 89 df e8 fb cd 0e e1 41 59 5b c9 c3 55 48 89 e5 66 66 66 66 90 <48> 8b 0f 41 b8 08 00 00 00 41 89 d1 44 0f af ce 83 fe 08 4e 8d
[ 8.817562] RIP [<ffffffffa0001084>] edac_align_ptr+0x9/0x5d [edac_core]
[ 8.817562] RSP <ffff880425213d60>
[ 8.817562] CR2: 0000000000000740
[ 9.099191] ---[ end trace 8214e97f27078aee ]---
--
Regards/Gruss,
Boris.
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551
next prev parent reply other threads:[~2012-04-18 15:26 UTC|newest]
Thread overview: 161+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-29 16:45 [PATCH 00/13] Convert EDAC internal strutures to support all types of Memory Controllers Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 01/13] edac: Create a dimm struct and move the labels into it Mauro Carvalho Chehab
2012-03-30 10:50 ` Borislav Petkov
2012-03-30 13:26 ` Mauro Carvalho Chehab
2012-03-30 15:38 ` Borislav Petkov
2012-04-16 8:41 ` Mauro Carvalho Chehab
2012-04-16 11:02 ` Borislav Petkov
2012-04-16 11:44 ` Mauro Carvalho Chehab
2012-04-16 13:21 ` Borislav Petkov
2012-03-29 16:45 ` [PATCH 02/13] edac: move dimm properties to struct memset_info Mauro Carvalho Chehab
2012-03-30 13:10 ` Borislav Petkov
2012-03-30 13:22 ` Mauro Carvalho Chehab
2012-03-30 17:03 ` Borislav Petkov
2012-04-16 8:56 ` Mauro Carvalho Chehab
2012-04-16 13:31 ` Borislav Petkov
2012-03-29 16:45 ` [PATCH 03/13] edac: Don't initialize csrow's first_page & friends when not needed Mauro Carvalho Chehab
2012-04-02 12:33 ` Borislav Petkov
2012-03-29 16:45 ` [PATCH 04/13] edac: move nr_pages to dimm struct Mauro Carvalho Chehab
2012-04-02 13:18 ` Borislav Petkov
2012-03-29 16:45 ` [PATCH 05/13] edac: Fix core support for MC's that see DIMMS instead of ranks Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 06/13] edac: Initialize the dimm label with the known information Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 07/13] edac: Cleanup the logs for i7core and sb edac drivers Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 08/13] i5400_edac: improve debug messages to better represent the filled memory Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 09/13] events/hw_event: Create a Hardware Events Report Mecanism (HERM) Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 10/13] i5000_edac: Fix the logic that retrieves memory information Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 11/13] e752x_edac: provide more info about how DIMMS/ranks are mapped Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 12/13] edac: Rename the parent dev to pdev Mauro Carvalho Chehab
2012-03-29 16:45 ` [PATCH 13/13] edac: use Documentation-nano format for some data structs Mauro Carvalho Chehab
2012-03-29 20:46 ` [PATCH 00/13] Convert EDAC internal strutures to support all types of Memory Controllers Aristeu Rozanski Filho
2012-04-02 13:59 ` Borislav Petkov
2012-04-16 12:58 ` Mauro Carvalho Chehab
2012-04-16 14:06 ` Borislav Petkov
2012-04-16 20:12 ` [EDAC PATCH v13 0/7] Convert EDAC core to work with non-csrow-based memory controllers Mauro Carvalho Chehab
2012-04-16 20:12 ` [EDAC PATCH v13 1/7] edac: Create a dimm struct and move the labels into it Mauro Carvalho Chehab
2012-04-26 14:26 ` Borislav Petkov
2012-04-16 20:12 ` [EDAC PATCH v13 3/7] edac: Don't initialize csrow's first_page & friends when not needed Mauro Carvalho Chehab
2012-04-16 20:12 ` [EDAC PATCH v13 4/7] edac: move nr_pages to dimm struct Mauro Carvalho Chehab
2012-04-17 18:48 ` Borislav Petkov
2012-04-17 19:28 ` Mauro Carvalho Chehab
2012-04-17 21:40 ` Borislav Petkov
2012-04-18 12:58 ` Mauro Carvalho Chehab
2012-04-18 17:53 ` [PATCH] " Mauro Carvalho Chehab
2012-04-16 20:12 ` [EDAC PATCH v13 5/7] edac: rewrite edac_align_ptr() Mauro Carvalho Chehab
2012-04-18 14:06 ` Borislav Petkov
2012-04-18 15:25 ` Borislav Petkov [this message]
2012-04-18 18:15 ` Mauro Carvalho Chehab
2012-04-18 18:19 ` [PATCH] " Mauro Carvalho Chehab
2012-04-23 14:05 ` Borislav Petkov
2012-04-23 15:19 ` Mauro Carvalho Chehab
2012-04-23 15:26 ` Mauro Carvalho Chehab
2012-04-16 20:12 ` [EDAC PATCH v13 6/7] edac.h: Prepare to handle with generic layers Mauro Carvalho Chehab
2012-04-23 17:49 ` Borislav Petkov
2012-04-23 18:30 ` Mauro Carvalho Chehab
2012-04-23 18:56 ` Mauro Carvalho Chehab
2012-04-23 19:19 ` [PATCH] edac.h: Add generic layers for describing a memory location Mauro Carvalho Chehab
2012-04-23 20:07 ` Mauro Carvalho Chehab
2012-04-24 10:46 ` Borislav Petkov
2012-04-24 10:40 ` [EDAC PATCH v13 6/7] edac.h: Prepare to handle with generic layers Borislav Petkov
2012-04-24 11:46 ` Mauro Carvalho Chehab
2012-04-24 12:42 ` Mauro Carvalho Chehab
2012-04-24 12:49 ` [PATCH] edac.h: Add generic layers for describing a memory location Mauro Carvalho Chehab
2012-04-24 13:09 ` Borislav Petkov
2012-04-24 13:22 ` Mauro Carvalho Chehab
2012-04-24 13:38 ` Borislav Petkov
2012-04-24 16:39 ` Mauro Carvalho Chehab
2012-04-24 16:49 ` Borislav Petkov
2012-04-24 17:38 ` Mauro Carvalho Chehab
[not found] ` <1335291342-14922-1-git-send-email-mchehab@redhat.com>
2012-04-24 18:15 ` [PATCH EDACv16 2/2] amd64_edac: convert driver to use the new edac ABI Mauro Carvalho Chehab
2012-04-27 10:42 ` Mauro Carvalho Chehab
2012-04-27 13:33 ` [PATCH EDACv16 1/2] edac: Change internal representation to work with layers Borislav Petkov
2012-04-27 14:11 ` Joe Perches
2012-04-27 15:12 ` Borislav Petkov
2012-04-27 16:07 ` Mauro Carvalho Chehab
2012-04-28 8:52 ` Borislav Petkov
2012-04-28 20:38 ` Joe Perches
2012-04-29 14:25 ` Mauro Carvalho Chehab
2012-04-29 15:11 ` Mauro Carvalho Chehab
2012-04-29 16:03 ` Joe Perches
2012-04-29 17:18 ` Mauro Carvalho Chehab
2012-04-29 16:20 ` Mauro Carvalho Chehab
2012-04-29 16:43 ` Joe Perches
2012-04-29 17:39 ` Mauro Carvalho Chehab
2012-04-30 7:47 ` Borislav Petkov
2012-04-30 11:09 ` Mauro Carvalho Chehab
2012-04-30 11:15 ` Borislav Petkov
2012-04-30 11:46 ` Mauro Carvalho Chehab
2012-04-27 15:36 ` Mauro Carvalho Chehab
2012-04-28 9:05 ` Borislav Petkov
2012-04-29 13:49 ` Mauro Carvalho Chehab
2012-04-30 8:15 ` Borislav Petkov
2012-04-30 10:58 ` Mauro Carvalho Chehab
2012-04-30 11:11 ` Borislav Petkov
2012-04-30 11:45 ` Mauro Carvalho Chehab
2012-04-30 12:38 ` Borislav Petkov
2012-04-30 13:00 ` Mauro Carvalho Chehab
2012-04-30 13:53 ` Mauro Carvalho Chehab
2012-04-30 15:02 ` [PATCH v2] edac_mc: Cleanup per-dimm_info debug messages Mauro Carvalho Chehab
2012-04-30 15:10 ` Mauro Carvalho Chehab
2012-04-30 15:20 ` Borislav Petkov
2012-04-30 15:33 ` Mauro Carvalho Chehab
2012-04-30 16:16 ` Joe Perches
2012-04-30 16:47 ` Mauro Carvalho Chehab
2012-04-30 16:44 ` [PATCHv3] " Mauro Carvalho Chehab
2012-04-30 11:37 ` [PATCH EDACv16 1/2] edac: Change internal representation to work with layers Mauro Carvalho Chehab
2012-04-27 17:52 ` Mauro Carvalho Chehab
2012-04-28 9:16 ` Borislav Petkov
2012-04-28 17:07 ` Joe Perches
2012-04-29 14:02 ` Mauro Carvalho Chehab
2012-04-29 14:16 ` Mauro Carvalho Chehab
2012-04-30 7:59 ` Borislav Petkov
2012-04-30 11:23 ` Mauro Carvalho Chehab
2012-04-30 12:51 ` Borislav Petkov
2012-04-24 12:55 ` [EDAC PATCH v13 6/7] edac.h: Prepare to handle with generic layers Borislav Petkov
2012-04-24 13:11 ` Mauro Carvalho Chehab
2012-04-24 13:32 ` Borislav Petkov
2012-04-24 14:24 ` Mauro Carvalho Chehab
2012-04-24 16:27 ` Borislav Petkov
2012-04-24 17:24 ` Mauro Carvalho Chehab
2012-04-25 17:19 ` Borislav Petkov
2012-04-25 17:47 ` Mauro Carvalho Chehab
2012-04-25 18:32 ` Luck, Tony
2012-04-25 18:44 ` Mauro Carvalho Chehab
2012-04-26 14:11 ` Borislav Petkov
2012-04-26 14:25 ` Mauro Carvalho Chehab
2012-04-26 14:59 ` Mauro Carvalho Chehab
2012-04-25 17:55 ` Luck, Tony
2012-04-24 17:31 ` Luck, Tony
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 00/26] Use the new EDAC kernel ABI on drivers Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 01/26] amd64_edac: convert driver to use the new edac ABI Mauro Carvalho Chehab
2012-05-07 14:31 ` Borislav Petkov
2012-05-07 16:12 ` Mauro Carvalho Chehab
2012-05-07 16:17 ` Borislav Petkov
2012-05-07 16:59 ` Mauro Carvalho Chehab
2012-05-07 19:49 ` Borislav Petkov
2012-05-07 16:24 ` Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 02/26] amd76x_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 03/26] cell_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 04/26] cpc925_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 05/26] e752x_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 06/26] e7xxx_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 07/26] i3000_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 08/26] i3200_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 09/26] i5000_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 10/26] i5100_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 11/26] i5400_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 12/26] i7300_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 13/26] i7core_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 14/26] i82443bxgx_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 15/26] i82860_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 16/26] i82875p_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 17/26] i82975x_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 18/26] mpc85xx_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 19/26] mv64x60_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 20/26] pasemi_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 21/26] ppc4xx_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 22/26] r82600_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 23/26] sb_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 24/26] tile_edac: " Mauro Carvalho Chehab
2012-04-26 19:47 ` Chris Metcalf
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 25/26] x38_edac: " Mauro Carvalho Chehab
2012-04-16 20:21 ` [EDAC_ABI PATCH v13 26/26] edac: Remove the legacy EDAC ABI Mauro Carvalho Chehab
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