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: <20240923021557.GA38742@google.com>
Date: Mon, 23 Sep 2024 11:15:57 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Venkat Rao Bagalkote <venkat88@...ux.vnet.ibm.com>
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	senozhatsky@...omium.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

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?