linux-kernel - Re: [Bug][Git-Bisect][6.11.0-next-20240917]BUG: Unable to handle kernel data access on read at 0xc00c020000013d88

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Message-ID: <03a55b4b-eb45-4187-9de6-ef06f8176d05@linux.vnet.ibm.com>
Date: Mon, 23 Sep 2024 11:06:43 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.vnet.ibm.com>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        akpm@...ux-foundation.org, minchan@...nel.org, terrelln@...com,
        sfr@...b.auug.org.au
Subject: Re: [Bug][Git-Bisect][6.11.0-next-20240917]BUG: Unable to handle
 kernel data access on read at 0xc00c020000013d88

Hello,


Below is the TC, I was running.


https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/generic/ltp.py

Regards,

Venkat.

On 23/09/24 7:45 am, Sergey Senozhatsky wrote:
> Hi,
>
> On (24/09/22 22:23), Venkat Rao Bagalkote wrote:
>> Greetings!!!
>>
>> I am observing Kernel OOPs on PowerPC system, while running LTP Test case.
>>
>> [11472.962838] BUG: Unable to handle kernel data access on read at
>> 0xc00c020000013d88
>> [11472.962846] Faulting instruction address: 0xc00000000055e2c0
> [..]
>> [11472.963005] NIP [c00000000055e2c0] kfree+0x60/0x468
>> [11472.963013] LR [c008000004e02838] zram_destroy_comps+0x5c/0xa4 [zram]
>> [11472.963020] Call Trace:
>> [11472.963023] [c0000005da817b30] [c00000051f580440] 0xc00000051f580440
>> (unreliable)
>> [11472.963028] [c0000005da817ba0] [c008000004e02838]
>> zram_destroy_comps+0x5c/0xa4 [zram]
>> [11472.963034] [c0000005da817bd0] [c008000004e02d24]
>> zram_reset_device+0x178/0x250 [zram]
>> [11472.963040] [c0000005da817c20] [c008000004e031e0] reset_store+0xd0/0x174
>> [zram]
>> [11472.963046] [c0000005da817c80] [c000000000a85874]
>> dev_attr_store+0x34/0x50
>> [11472.963052] [c0000005da817ca0] [c00000000070e7a4]
>> sysfs_kf_write+0x64/0x78
>> [11472.963060] [c0000005da817cc0] [c00000000070d2a8]
>> kernfs_fop_write_iter+0x1b0/0x290
>> [11472.963066] [c0000005da817d10] [c000000000604868] vfs_write+0x38c/0x488
>> [11472.963071] [c0000005da817dc0] [c000000000604c98] ksys_write+0x84/0x140
> Can you post the script that you run?