From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1696B10E9 for ; Mon, 23 Sep 2024 02:16:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727057765; cv=none; b=l0Ghh0FFfM4OjPph3hbok1SdK03UFiRBfroQCbaiPzmVZqW2lMrBszTtuFwvvdQj1JYAf1hD8mUnahyTMpLgNJO/OrStXaNS9jJaAFhnL+dkFHwbiB55PnZfkl86iVToWJIFkfv2Psm8CZT5viRmDaz0hIPoPmJGadQG9g4VSzQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727057765; c=relaxed/simple; bh=d/jMoc0fE2qUw6SNYHaGC41Nyi+tsSLAFREYoBUiS54=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=iJfLbdRLWwoOfIBiJ5739BP6dCLhOUyUhlQvjpCAOe5WD3kVKCCY1J0qGM6VxVkVgheLeGlMZ9c57S7OPauyIcb8GnAQG7pi2vHP8YYGu8DNu6/68wHdBosWu/+5o1uI0vQzthjF4Yo3q1B7zlLr4RJ4NSRuLYRLSwayvssxiq0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=OAaoj/+s; arc=none smtp.client-ip=209.85.215.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="OAaoj/+s" Received: by mail-pg1-f177.google.com with SMTP id 41be03b00d2f7-7d4f85766f0so3159752a12.2 for ; Sun, 22 Sep 2024 19:16:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1727057762; x=1727662562; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=iasbysCenz7uyGomAHZxudZeL78s012Zo7N6U1Pe6Yk=; b=OAaoj/+s46rxB58ZsI6Oop0CDfn8zj1jUZUvIxJG5CPUZvPiAggQiOo7alLtlKyxxI 7Toxb/HMRI+bzPolmX59Vvklrp5c0lkdeflL3hhIDFLA2npcLKtckZaVr00RTDxu12z3 KZSc/ckVslcSQUs6W2Nj2/c1Dhp3actUj+bCU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727057762; x=1727662562; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=iasbysCenz7uyGomAHZxudZeL78s012Zo7N6U1Pe6Yk=; b=oYYOiD+nK3q+LRjZrGM3Sq4K4nVETr5rXhREarlltZd+46no0/Hb6PhkjYdErPldS2 R7b7Yq/kZ8eivMGOBmKZaFHJW6xBNrnqpMQpJU66mlMOw7ocCjZBlLsEIx24/doBxLNc Rs2j6+4JUHlM9X0SXaw4bAoCTBYnsvASdnsF9ncAA4ysKt+9L2a2ezUVG54oJLCVULrh Sh5M37DJmg+vT55/RvspNf9oAe4H7WH4UtWghMt+lxAY0AaAdD/O8yuJFPA8oHj1HdFn FaLQG40HvZRGGlu2Cq7cP9xzYk6pKBRo139fPxTfdZLEld0X+gXLfMrrJOR2w3Sf388X is1w== X-Gm-Message-State: AOJu0YzdQaUUrHMObLiPnEx8OaXinny6PdLiwUhCofaPgRBplkp9emZv dnIZFqbHgxIdMFw2jylt83kFiIB9orNdgDRLcuT6sX6kk4EN23TwQLGOj15GASFZz0cycpGeoj0 = X-Google-Smtp-Source: AGHT+IEVFNeMkz/rQnZtNMOkdI7qq6A51lL3WpTLQ0ItCoFcML/fGuk1r4Dc3g5VZuRpkYNgUCKSEw== X-Received: by 2002:a05:6a20:c89c:b0:1cf:55e:f893 with SMTP id adf61e73a8af0-1d30a9be5ddmr13234422637.36.1727057762370; Sun, 22 Sep 2024 19:16:02 -0700 (PDT) Received: from google.com ([2401:fa00:8f:203:3e10:9e7e:65b4:e016]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7db4999cddasm14510674a12.76.2024.09.22.19.16.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Sep 2024 19:16:01 -0700 (PDT) Date: Mon, 23 Sep 2024 11:15:57 +0900 From: Sergey Senozhatsky To: Venkat Rao Bagalkote Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, senozhatsky@chromium.org, akpm@linux-foundation.org, minchan@kernel.org, terrelln@fb.com, sfr@canb.auug.org.au Subject: Re: [Bug][Git-Bisect][6.11.0-next-20240917]BUG: Unable to handle kernel data access on read at 0xc00c020000013d88 Message-ID: <20240923021557.GA38742@google.com> References: <57130e48-dbb6-4047-a8c7-ebf5aaea93f4@linux.vnet.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <57130e48-dbb6-4047-a8c7-ebf5aaea93f4@linux.vnet.ibm.com> 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?