From: Michael Schmitz <schmitzmic@gmail.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: Christoph Hellwig <hch@lst.de>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Greg Ungerer <gerg@linux-m68k.org>,
linux-m68k@lists.linux-m68k.org
Subject: Re: RFC: remove set_fs for m68k
Date: Tue, 13 Jul 2021 07:12:45 +1200 [thread overview]
Message-ID: <969718aa-92d4-e77b-0630-f9da6c809178@gmail.com> (raw)
In-Reply-To: <87fswjomtm.fsf@igel.home>
Hi Andreas,
On 12/07/21 10:20 pm, Andreas Schwab wrote:
> On Jul 11 2021, Michael Schmitz wrote:
>
>> Testing your series, I've got this in the console log:
>>
>> [16534.130000] *** FORMAT ERROR *** FORMAT=0
>> [16534.150000] Current process id is 1347
>> [16534.160000] BAD KERNEL TRAP: 00000000
>> [16534.180000] Modules linked in: atari_scsi ne 8390p
>> [16534.210000] PC: [<00002a8c>] resume_userspace+0x14/0x16
>> [16534.230000] SR: 2200 SP: d1b6e0e8 a2: 00000000
>> [16534.240000] d0: 0000001e d1: 00000003 d2: 00000578 d3: 00000000
>> [16534.270000] d4: ffffffff d5: 00000001 a0: 00000578 a1: 00000080
>> [16534.300000] Process savelog (pid: 1347, task=e3955528)
>> [16534.310000] Frame format=0
>> [16534.330000] Stack from 005e9fa4:
>> [16534.330000] 02108005 0d06b008 1eeeb649 007e0001 00aea040
>> 003ec318 005e9e68 000279a2
>> [16534.330000] 000b0000 00000000 00000000 030dfffb 0044fffa
>> 0e000000 fffa1a00 fffa1c00
>> [16534.330000] fffa1e00 fffb0e40 fffb0e80 00049e02 00000040
>> 0085a800 00000001
>> [16534.430000] Call Trace: [<000279a2>] warn_slowpath_fmt+0x0/0x62
>> [16534.460000] [<000b0000>] vm_map_ram+0x144/0x5ae
>> [16534.490000] [<00049e02>] __handle_irq_event_percpu+0x38/0xce
>> [16534.520000]
>> [16534.540000] Code: 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 <9f38> 9f38
>> 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38 9f38
> That looks like something overwrote the kernel code. 0x9f38 isn't an
> insn that you would ever see in the kernel.
That confirms my guess - can we rely on the call trace in that case? And
how does overwriting kernel code at that address tee up with the kernel
still happily chugging along?
Cheers,
Michael
>
> Andreas.
>
next prev parent reply other threads:[~2021-07-12 19:12 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 7:01 RFC: remove set_fs for m68k Christoph Hellwig
2021-07-09 7:01 ` [PATCH 1/7] m68k: document that access_ok is broken for !CONFIG_CPU_HAS_ADDRESS_SPACES Christoph Hellwig
2021-07-09 7:01 ` [PATCH 2/7] m68k: use BUILD_BUG for passing invalid sizes to get_user/put_user Christoph Hellwig
2021-07-09 7:01 ` [PATCH 3/7] m68k: remove the inline copy_{from,to}_user variants Christoph Hellwig
2021-07-09 7:01 ` [PATCH 4/7] m68k: remove the err argument to the get_user/put_user assembly helpers Christoph Hellwig
2021-07-09 7:01 ` [PATCH 5/7] m68k: factor the 8-byte lowlevel {get,put}_user code into helpers Christoph Hellwig
2021-07-09 7:01 ` [PATCH 6/7] m68k: provide __{get,put}_kernel_nofault Christoph Hellwig
2021-07-09 7:01 ` [PATCH 7/7] m68k: remove set_fs() Christoph Hellwig
2021-07-11 7:20 ` RFC: remove set_fs for m68k Michael Schmitz
2021-07-12 9:50 ` Christoph Hellwig
2021-07-12 10:20 ` Andreas Schwab
2021-07-12 19:12 ` Michael Schmitz [this message]
2021-07-13 5:41 ` Christoph Hellwig
2021-07-13 8:16 ` Michael Schmitz
2021-07-13 8:54 ` Christoph Hellwig
2021-07-14 19:26 ` Michael Schmitz
2021-07-14 20:03 ` Andreas Schwab
2021-07-15 5:44 ` Michael Schmitz
2021-07-16 2:03 ` Michael Schmitz
2021-07-17 5:41 ` Michael Schmitz
2021-07-18 1:14 ` Michael Schmitz
2021-07-21 17:05 ` Christoph Hellwig
2021-07-21 19:20 ` Michael Schmitz
2021-07-23 4:00 ` Michael Schmitz
2021-07-23 5:11 ` Christoph Hellwig
2021-07-25 7:36 ` Michael Schmitz
2021-07-31 19:31 ` Michael Schmitz
2021-08-06 3:10 ` Michael Schmitz
2021-08-11 9:12 ` Christoph Hellwig
2021-08-12 3:37 ` Michael Schmitz
2021-08-15 7:42 ` Christoph Hellwig
2021-08-15 19:17 ` Michael Schmitz
2021-08-16 6:58 ` Christoph Hellwig
[not found] ` <23f745f2-9086-81fb-3d9e-40ea08a1923@linux-m68k.org>
[not found] ` <20210816075155.GA29187@lst.de>
[not found] ` <d407a2a1-738b-5cd5-c2ed-b7250c5da8ec@gmail.com>
[not found] ` <83571ae-10ae-2919-cde-b6b4a5769c9@linux-m68k.org>
[not found] ` <dc594142-e459-533e-cac2-c7a213cec464@gmail.com>
[not found] ` <f4ab2dcb-6761-c60b-54ce-35d0d017d371@gmail.com>
[not found] ` <d772d22e-a945-3e35-80a2-f4783893bea@linux-m68k.org>
[not found] ` <b2c55280-657b-51c2-065c-3fc93db050b9@gmail.com>
[not found] ` <d7b8f7eb-fc18-c8d-fe3e-dcdf19d3f4b@linux-m68k.org>
[not found] ` <755e55ba-4ce2-b4e4-a628-5abc183a557a@linux-m68k.org>
[not found] ` <b52a10fe-3e4b-5740-d3f8-52bce3bc988@linux-m68k.org>
[not found] ` <31f27da7-be60-8eb-9834-748b653c2246@linux-m68k.org>
2021-09-07 3:28 ` Mainline kernel crashes, was " Finn Thain
2021-09-07 5:53 ` Michael Schmitz
2021-09-07 23:50 ` Finn Thain
2021-09-08 8:54 ` Michael Schmitz
2021-09-09 9:40 ` Finn Thain
2021-09-09 23:29 ` Michael Schmitz
2021-09-09 22:51 ` Finn Thain
2021-09-10 0:03 ` Michael Schmitz
2021-09-12 0:51 ` Finn Thain
2021-09-12 3:55 ` Brad Boyer
2021-09-13 1:27 ` Finn Thain
2021-09-13 3:26 ` Michael Schmitz
2021-09-13 5:22 ` Finn Thain
2021-09-13 7:20 ` Michael Schmitz
2021-09-14 3:13 ` Michael Schmitz
2021-09-15 1:38 ` Finn Thain
2021-09-15 8:37 ` Michael Schmitz
2021-09-16 9:04 ` Finn Thain
2021-09-16 22:28 ` Michael Schmitz
2021-09-21 21:14 ` Michael Schcmitz
2021-08-22 19:33 ` Michael Schmitz
2021-08-23 4:04 ` Michael Schmitz
2021-08-23 17:59 ` Linus Torvalds
2021-08-23 21:31 ` Michael Schmitz
2021-08-23 21:49 ` Linus Torvalds
2021-08-24 8:08 ` Andreas Schwab
2021-08-24 8:44 ` Michael Schmitz
2021-08-24 8:59 ` Andreas Schwab
2021-08-25 7:51 ` Michael Schmitz
2021-08-25 8:44 ` Andreas Schwab
2021-08-25 22:59 ` Michael Schmitz
2021-08-25 23:30 ` Brad Boyer
2021-08-26 7:46 ` Michael Schmitz
2021-08-26 7:45 ` Andreas Schwab
2021-09-14 2:43 ` Michael Schmitz
2021-09-14 15:54 ` Linus Torvalds
2021-09-14 16:28 ` Al Viro
2021-09-14 16:38 ` Linus Torvalds
2021-09-15 1:06 ` Al Viro
2021-07-12 19:04 ` Michael Schmitz
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