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X-CSE-ConnectionGUID: w8ZsnNHdSROzLXYqJBP/vw== X-CSE-MsgGUID: S2DthmmZTmCTIJUxoOrf+g== X-IronPort-AV: E=McAfee;i="6800,10657,11772"; a="96095331" X-IronPort-AV: E=Sophos;i="6.23,208,1770624000"; d="scan'208";a="96095331" 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 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 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 0DB6CA0007 X-Stat-Signature: xw7cz69h3sgzome1dazzxazy8o1a4tug X-Rspam-User: X-HE-Tag: 1777568380-355791 X-HE-Meta: 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 avLwV5KF uzwQjV9rlCm6djC4t3oBwb8rLnykt8KLy2wpjqw2nPTge8PJ2eUtya2JF3tzyF5GJDUJsxdQa986ftaa0Q1GhOR3h8sYAHcgICWod3QW61T/eaH8F2eq4T/qkQFh4Q6Q1s+oPFxGcY3WcaSQNDFKCRUSonX/9TR+t9ZjOxvwGfp8P7UZbgUC58Qf60KyLqeZe6QWWTUQ3TvBZ28NmDLNfwGlwa5EnJtezULEKsSo6bd+FIQz8D+MgbBJdK6L3+LTxu/WIU9IsCGDARfq/96jSBcBQ/7xzhMZAke0lJqXjU4EwYmNsOpIU3Ds3SedFJ01A9Kn/bnz8ghOPJ2iyE4py9/7pUObcp3TJg30/ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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.