From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 1C45B212D97 for ; Thu, 20 Feb 2025 17:43:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740073422; cv=none; b=TVqAQgDo/LVKJkztHMwKb9GROr2u6FfmTWzEx7+YQuR6vparJfA6Su2e9WNYbUHtqIYqBVqOL+pzn08jYe8ANqrOVZEHMYhoPU4E5Ybz03DKTjycN1xJagxjLMnt+OTDwY/mySzS32qW4/EiHr5Nha5gbhvM1KB0QDXKj99o2II= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740073422; c=relaxed/simple; bh=usuZGUAtebqFlzbxpJ09+Fsa2hbTxy9H2t/CGIiL8sI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=i2S1tKUknjHAXC+hvkbrJ+lt8tZdhcNHbcy9Z9HWcvbwP0Y3FHLXiElHmM0/+ksHMShLa4VOO3+VTEhsYM2CQmX3F+AbHo2buNOY+RNzw0G6XT42WvBwfplJ5V/s2t7EtkuDzniSYCkWnaNF1YgVJQaHgIGS9qAgTOSVD4H87P0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=NK8RLOsR; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="NK8RLOsR" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2fc1eabf4f7so2694345a91.1 for ; Thu, 20 Feb 2025 09:43:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1740073420; x=1740678220; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=sikh5SAYhpSS22RtmRiuMGMqEaJpRF62XukNxLFh/AY=; b=NK8RLOsR7dq6KFEZvhUYsuekE+JsnDQ7x8wEVwjILvie9LhpmDOXC4ncfjsumArQTz 7xE/5qIJxywP1fw1ln89GUCI8+cGk/YxuMLJmYIcYPqOxgqmBoqx1t9o2YCzGx+i5+g+ m0h60KYb76utIj+REATgdPfWnBVliWQrpMxAEENMqrtwew+D8lH65WN+7+o1fSlLAEzK y+yPeeiYWOvgkNr/n3yLOgG3tvIqM9yovQbFfoc2tSY119rEoAD3oE5W6EyTw0v7q476 BLs/W6oRItWC83cmWq2MIBxLauK7RKVFBShx51s9Nd7nMz4cv/eHwtVTAyafVIaLt8og +qrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740073420; x=1740678220; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=sikh5SAYhpSS22RtmRiuMGMqEaJpRF62XukNxLFh/AY=; b=IbES/AjzaAQzP8ZgzY+li6EJ8ZBy0QFQmItPs17efX9zBDWgQTbRHY9Hj1z4jQ8KDH qR6mqlQpNyBNXql6zNQAg5iGXAr/PvIUROZHEHTba4PnhlqkK3VxAc8J2YKuxUfGb7Ce tOqqtT6IEZuAJf0AUg7Z1d24U7YZAIJ3F1Ssh3yanTJlY5YMJ6RpOoze8ncWu0Do8Wof oQj1cGJSWFDJzEl8kpizrGTfE9DZhdEZYFrzaCedhXVicqYST7NkHna9Qu7gMomKkmDE SqrEbt26F2XbimK76ac6UBTSv8aWzPH4Pb1SbOwbaLGDtrNrEagkAhDrhGZGydDc5wjd whaA== X-Gm-Message-State: AOJu0Yz8m/HGwl3E28K22DkwJuPIq789DABni/ujFYg1L5cx/35pCom7 1/9TcaplQp6t2W+pOspzZuUxNNKfLdF974u7udpSVRuQp/Abw3S3/VC7l7nbY+Rp1//1lBwwtKX mUA== X-Google-Smtp-Source: AGHT+IE1CUVX9qIYmaKSa01tUKYfZLpjvA3ewbpeLW06UvwSk0kDGWMGUMbA7rZDAxd0VMCUNhibkDRCEb8= X-Received: from pjbnd5.prod.google.com ([2002:a17:90b:4cc5:b0:2e9:38ea:ca0f]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:384d:b0:2ee:ed1c:e451 with SMTP id 98e67ed59e1d1-2fce78cbc8bmr46892a91.15.1740073420398; Thu, 20 Feb 2025 09:43:40 -0800 (PST) Date: Thu, 20 Feb 2025 09:43:38 -0800 In-Reply-To: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: Message-ID: Subject: Re: [Bug 219787] Guest's applications crash with EXCEPTION_SINGLE_STEP (0x80000004) From: Sean Christopherson To: bugzilla-daemon@kernel.org Cc: kvm@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Thu, Feb 20, 2025, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=219787 > > --- Comment #4 from rangemachine@gmail.com --- > (In reply to Sean Christopherson from comment #2) > > Are you able to bisect to an exact commit? There are significant KVM > > changes in 6.13, but they're almost all related to memory management. I > > can't think of anything that would manifest as an unexpected single step > > #DB, especially not with any consistency. > > > > And just to double check, the only difference in the setup is that the host > > kernel was upgraded from v6.12 => v6.13? E.g. there was no QEMU update or > > guest-side changes? > > I was not able to bisect yet, sorry. No need to be sorry, you didn't introduce the bug :-) > And yes, I double checked, the only change is kernel upgraded from v6.12.10 > to v6.13.2 (did not checked v6.13.3 yet, but rc version had some behaviour). Please let me know if you'll be able to bisect (or not). Unless I have a random epiphany, this will likely require bisection.