From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 387ED1AAE1A for ; Thu, 29 Aug 2024 17:02:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724950947; cv=none; b=MXw3otond4rLYeB2bA/lWQ5OJoNGx/A762dTvVIIsyBj53j0nHFn1zD2/eG5lCOr2uZE2awAAb0VTb9LW9pia7OCT+8vwXL+RhFxMjqsL4TVMbpU5ZZcJIGc1e6VI/DRw1sp9Fa6ICDDcqUD+FChbsaDfZUR57g4zliOvGwlKxs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724950947; c=relaxed/simple; bh=gcYF+NoDeDfdXu+gm6nCLu2I8jfzlGanW/cJzKzTLAs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=D3pwAeuq1mTanwpddP1XRZKdISiS3kcIFK/5qr/uxEHaayuAQ0rJU4ETXe2P6GSfOgQv/w+fi82Pjv2iC9Uj3AfBzjJNMD8v1813YdZy+FsoVoN/x5ZzQA772az46M32bXi3ZZ9mmxQMrwaxb+EOuVD9yDYFR8auzxRDQqIHQmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--nogikh.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FzadcxgS; arc=none smtp.client-ip=209.85.128.202 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--nogikh.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FzadcxgS" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6b351a76beeso20067417b3.0 for ; Thu, 29 Aug 2024 10:02:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1724950945; x=1725555745; 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=Xu2+jcmHfLGqxfEB8BtcD+CyPwLkbrwiJSDJROL1kOs=; b=FzadcxgSkpAty6fko9XWwzXCD8uBJGFJCTviCSyso03FR8HXzCYqXTlYJClJXHsXF3 CzVtMqu81WAy2apLJ9egaSBvbsRdQFvBvnPzIos99MEFHuhFhYeFy1TtTvB1mjoADtLC A2KtS0UjgXQvCvx5gQbRDgE6lQAT6GQhYqgY2HzAeEuNWFxb0ndhvIKQ0o5LPfTRoCBo poaVUaIqE5IsRMAjN91dhtlS0cf5nizJbnlWWiv2iGl3K07hhCFjpkACwwITV74bcYyX eJGuRa5BIElfSmsJuwzY04pFNDHJ492teUv3tQEvfMgAhTKu6OvbMKvrb71a88YYLwrC Nnbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724950945; x=1725555745; 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=Xu2+jcmHfLGqxfEB8BtcD+CyPwLkbrwiJSDJROL1kOs=; b=mvFsf8EHIdUuxYpxMNnOHVbBBKOqPqc+267hXgcn90y1KxlJYShlcNc+XTTSx8vcev x8lMX+DY4uBmFhuYsRPhLJRJFT4aWyff+PQfTngFtwtINxv18ydTKuy84S32FAv0FS/e A7BI0d42/nwbtqkIqruZ1TneRNHq1SMqJJofL1eHlwRgqXqq2xsd2cO+OTXzAPSM4OHB twbp1MC9EB+wwVy943+05yCF8NA25W30mdn4IyyBqo0UHXrUzMmM9+pH566N2QflxXTy tGT7GNt3RaitWWrUq3IC9tKqEBvpNNhcxZ38oLLG6WGlRFkJH4DWrwQPZ6CKcxCYBaW2 Vpjw== X-Forwarded-Encrypted: i=1; AJvYcCVbAgxVcnNj0FT8i5pDFamiI/Mb0JXac00SsGzlyBK+sXtE8HQeHRRcReS+ykO0mx3I++DMX5k+RlpA+3g=@vger.kernel.org X-Gm-Message-State: AOJu0YzRaN1rMc2rCyBlmZ5uJrZpC3viBpeWiNVc25xU08PsbdDgAj8C /K9KO3XYWLV9hExfFmcbhzeU9cByJDrRtqHtZ57m5tYqlMeQfOqDQfBQJN+wFr/kLYmW3lS8joP IAQ== X-Google-Smtp-Source: AGHT+IHxVo+t1+38CXIDKhdHW3yDunUOvAqFmBszn+ZSbkI5s68ZT87xtZi5NP9rD/d8sCIPORwXjlD2yqo= X-Received: from nogikhp920.muc.corp.google.com ([2a00:79e0:9c:201:fce8:d4a4:aa70:51a5]) (user=nogikh job=sendgmr) by 2002:a25:9011:0:b0:e13:e11c:507 with SMTP id 3f1490d57ef6-e1a5ab46f56mr5928276.3.1724950945152; Thu, 29 Aug 2024 10:02:25 -0700 (PDT) Date: Thu, 29 Aug 2024 19:02:22 +0200 In-Reply-To: <20240727102732.960974693@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240727102732.960974693@infradead.org> X-Mailer: git-send-email 2.46.0.469.g59c65b2a67-goog Message-ID: <20240829170222.3680522-1-nogikh@google.com> Subject: Re: [PATCH 00/24] Complete EEVDF From: Aleksandr Nogikh To: peterz@infradead.org Cc: bsegall@google.com, dietmar.eggemann@arm.com, efault@gmx.de, juri.lelli@redhat.com, kprateek.nayak@amd.com, linux-kernel@vger.kernel.org, mgorman@suse.de, mingo@redhat.com, rostedt@goodmis.org, tglx@linutronix.de, vincent.guittot@linaro.org, vschneid@redhat.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, syzkaller-bugs@googlegroups.com, dvyukov@google.com, syzkaller@googlegroups.com Content-Type: text/plain; charset="UTF-8" This series has caused an explosion of different kernel crashes on our syzbot instance that fuzzes linux-next. I guess, such kernel behavior indicates some massive underlying memory corruption (?) Some of the crash titles we've seen (we didn't release them -- there were too many, 70+): KASAN: stack-out-of-bounds Write in insn_decode kernel panic: stack is corrupted in vprintk_store kernel panic: stack is corrupted in _printk BUG: spinlock recursion in __schedule WARNING in __put_task_struct BUG: unable to handle kernel NULL pointer dereference in asm_exc_page_fault WARNING in rng_dev_read BUG: scheduling while atomic in prb_final_commit kernel BUG in dequeue_rt_stack BUG: scheduling while atomic in rcu_is_watching BUG: spinlock recursion in copy_process KASAN: slab-use-after-free Read in sched_core_enqueue kernel panic: stack is corrupted in refill_stock kernel panic: stack is corrupted in prb_reserve WARNING: bad unlock balance in timekeeping_get_ns KASAN: slab-use-after-free Read in set_next_task_fair I wonder if the actual problem is already known and possibly there are even some fix patches? If not and if it may be of any help, we can try to come up with some contained instruction to reproduce these issues with syzkaller. -- Aleksandr