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X-CSE-ConnectionGUID: ACaI+D9ZS7+bcOaKmj33Pg== X-CSE-MsgGUID: rZER8dU0TUSfqZrWdo77zw== X-IronPort-AV: E=McAfee;i="6800,10657,11772"; a="96095330" X-IronPort-AV: E=Sophos;i="6.23,208,1770624000"; d="scan'208";a="96095330" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Apr 2026 09:59:39 -0700 X-CSE-ConnectionGUID: KIoQFjQPTPCjaeQ0Umg92w== X-CSE-MsgGUID: Mgd8RrCESZGFaKxPHOOErw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,208,1770624000"; d="scan'208";a="238958199" Received: from cjhill-mobl.amr.corp.intel.com (HELO [10.125.109.74]) ([10.125.109.74]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Apr 2026 09:59:39 -0700 Message-ID: <202886a1-a433-4bcf-9d86-41e8ef6396c8@intel.com> Date: Thu, 30 Apr 2026 09:59:40 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot ci] Re: mm: Make per-VMA locks available in all builds To: syzbot ci , akpm@linux-foundation.org, dave.hansen@linux.intel.com, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, shakeel.butt@linux.dev, surenb@google.com, vbabka@kernel.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com References: <69f30b06.170a0220.3c4978.0018.GAE@google.com> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/30/26 00:55, syzbot ci wrote: > and found the following issue: > WARNING in mbind_range > > Full report is available here: > https://ci.syzbot.org/series/374f338e-4b3b-4645-871c-78964f944bbd > > *** > > WARNING in mbind_range I left a whole bunch of #ifdef CONFIG_PER_VMA_LOCK cruft around in v1. I suspect some of the debugging code ended up in a weird state in a config that I didn't test. I'll try to reproduce this splat, though. It looks straightforward enough.