From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f8.google.com (mail-oi2-f8.google.com [74.125.231.200]) (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 422CE484238 for ; Mon, 21 Sep 2026 11:07:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789988868; cv=none; b=RQj1d43ZT7w/vUM7uPmBQ/7Pm+BtGiOTQZBVgMtcC3B6RPTTXwsNMZJGZOaruSfCsYx0jCrFkvCC0tWS5xbLGRkDTQJcYOsS2Qe+k3X5Wr4CqF7btioOA2Tab2Y0moV785Au8NCOF33sVbvhUMjWS21aNKtY6rjsLOZLx8VfCaQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789988868; c=relaxed/simple; bh=nFA1kLxPFD6DXL7JegHDVi+dyMdIf8B9BDVi9szT22o=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=dmLr4AyEP5EJBs78RVfzzynD/CTJ0p5fY3hVgG8E4FN9oex0k/0Z1ZPEv+LFVWIwzReWnsxb90pXlxaj3cixVNYX21EEqSsGDlr4ubowIoEsyBV+B0vB+hDu7qWXzymYvdp0tA0BBt+FhfTdcJpmidJ1akFnsdUT4Tu8NZ36jrE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=74.125.231.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi2-f8.google.com with SMTP id 46e09a7af769-804d58d09e9so912878a34.1 for ; Mon, 21 Sep 2026 04:07:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789988858; x=1790593658; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=X4NPzwFFH/PIySvIe6MuM8xYH8txyEHUbV+e+2t0RMs=; b=YzHztSnX1kB2vJYGSCzBuF3m6x1vAIqhbIr2gtHB0MCN4rAMN8+75VuJZ5eYbs3UZX EJRxfcqEnE7SbkCu79RbXgq46pDmrrUI565X/jlmbLgwwBO4k4ewiWh3Oqn5zpKPT1IZ xDc5ENJlcPG/AaoR7Ji7Lr9nVhbCcjuZ8poQZw/M14o7dHzUSAhoOmSUHdMv9pKv7fHe hm+rUtS285GthyfvedBtQS2ewdVcUfoyBH2c/OWdn985bCz4PYIdLmJIpbl0FqMjFYvz +Y3nPGVdeML89YDMjkUyKHM6u9tuS90iw4AWqboZ+mo9DSubvz1FPa1xkN0nULsjfjAC 1/IA== X-Gm-Message-State: AFuF++lPokX8BzVnkMdLsDCuiGitDtdTV1a/7esMiYZMrTLMKjh5tnN0 G+7Fp4mYLKSYXTFvh9ZkuzqOoSgOz13WraECKl3N+H6qUU3/nBZzuofb+NemYnt1O+SUJYa2blW eSo6IKnuUyZzMiHt48+3Twc5H0PwmtJvHGL0mueR00iUgjPa+b5D3nMAyAVPkhQ== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3403:20b0:6cd:3fcc:96d9 with SMTP id 006d021491bc7-6cd3fdbde06mr4054540eaf.87.1789988858742; Mon, 21 Sep 2026 04:07:38 -0700 (PDT) Date: Mon, 21 Sep 2026 04:07:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab10ffa.a6af0033.177e91.0014.GAE@google.com> Subject: [syzbot] [raid?] WARNING in free_conf From: syzbot To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, magiclinan@didiglobal.com, song@kernel.org, syzkaller-bugs@googlegroups.com, xiao@kernel.org, yukuai@fnnas.com, yukuai@fygo.io Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5dd1818b15d9 Merge tag 'for-next-keys-v7.3-rc4' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1074e7f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3be6e434b07ebb6 dashboard link: https://syzkaller.appspot.com/bug?extid=6a132745caefcf42cb0d compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ecb73b95440b/disk-5dd1818b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e90eba3671c9/vmlinux-5dd1818b.xz kernel image: https://storage.googleapis.com/syzbot-assets/ea031fa7db3f/bzImage-5dd1818b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6a132745caefcf42cb0d@syzkaller.appspotmail.com ----------------------------------------------------------------------------- Object 0xffff88808b840000 @offset=0 Object 0xffff88808b8404d8 @offset=1240 Object 0xffff88808b8409b0 @offset=2480 Object 0xffff88808b840e88 @offset=3720 Slab 0xffffea00022e1000 objects=13 used=4 fp=0xffff88808b841360 flags=0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) Disabling lock debugging due to kernel taint ------------[ cut here ]------------ 1 WARNING: mm/slub.c:1268 at __slab_err+0x15/0x20 mm/slub.c:1268, CPU#0: syz.5.636/7760 Modules linked in: CPU: 0 UID: 0 PID: 7760 Comm: syz.5.636 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026 RIP: 0010:__slab_err+0x15/0x20 mm/slub.c:1268 Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e8 2b 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 7c 0f 5f 00 90 <0f> 0b 90 e9 5e 04 e8 ff cc 66 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000527f840 EFLAGS: 00010083 RAX: ffffffff81874cba RBX: ffff88801f7fb280 RCX: 0000000000080000 RDX: ffffc9000ddd2000 RSI: 000000000000eef7 RDI: 000000000000eef8 RBP: 0000000000000000 R08: ffffffff939990a7 R09: 1ffffffff2733214 R10: dffffc0000000000 R11: fffffbfff2733215 R12: ffffea00022e8c10 R13: ffffea00022e1000 R14: ffffc9000527f858 R15: ffff88805445e3c0 FS: 00007f088e6396c0(0000) GS:ffff888124cce000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffca4261db0 CR3: 000000003121e000 CR4: 0000000000350ef0 Call Trace: free_partial mm/slub.c:8122 [inline] __kmem_cache_shutdown+0x1a5/0x2b0 mm/slub.c:8165 kmem_cache_destroy+0x9d/0x180 mm/slab_common.c:576 shrink_stripes drivers/md/raid5.c:2719 [inline] free_conf+0x1fc/0x5d0 drivers/md/raid5.c:7553 setup_conf+0x1720/0x2ad0 drivers/md/raid5.c:7885 raid5_takeover_raid1 drivers/md/raid5.c:8934 [inline] raid5_takeover+0x641/0x8d0 drivers/md/raid5.c:9045 level_store+0x83b/0x1d10 drivers/md/md.c:4134 md_attr_store+0x3b7/0x640 drivers/md/md.c:6158 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f088d79e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f088e639028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f088da25fa0 RCX: 00007f088d79e159 RDX: 0000000000000005 RSI: 0000200000000300 RDI: 0000000000000004 RBP: 00007f088d83506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f088da26038 R14: 00007f088da25fa0 R15: 00007ffc30f7c868 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup