From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 1A0DC37881E for ; Thu, 13 Aug 2026 08:42:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786610560; cv=none; b=GAdf/GO12vlwcMi4jy+S3rI4OXAfTkHoGBfY3bePJsqRrJu6oPNtA5xtBfj5RfbSXdsoHWjhmNWqvCqVvEqp7RQqCR61lxe5/Mgzju42vLYzBZRICsAb0LvTIsvUPGLqb4BVo446TsenlY+f1is0LE7kQUwWxNmxmkOLKuGEvwk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786610560; c=relaxed/simple; bh=hos4bw5VHJHhhLY+m81nn1xVmQNDb/c94zUZlBUILtw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=eRpPzwred5lW4oQYDYBNKTXz01yMKtY3f/ywu5Pjr51DbjM0/RJc4N6yYFqxxcCpy8DVk4yBHtoDZfJ0Fi2ql/+P4/tCx8bZXYSLvG199uUafWlW28gHpVwm0iQ3x44EGewjM0oIULBjsvvDTxsnBjxFHbVGNa7yvfDXUHYdr0I= 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=209.85.161.71 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-oo1-f71.google.com with SMTP id 006d021491bc7-6ae46631c42so348790eaf.2 for ; Thu, 13 Aug 2026 01:42:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786610558; x=1787215358; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=iaplxS5GhXCQwol88E64zD+uBbxKgP82FZ6K+TUTjrw=; b=Ydq6p/LKTkRqAAC4MOoQpomT1Km3NyCLJForPTl7mWaPRHgL2BYKCFqqLXtz4kjE+/ ZLtSUtwcuSr84QOqPRIjdKs5gwYyMW7Je7/abqCxekH3OM6WC7S8Z6lyu4VOFQ54k9By 21WPpg5RSsi98N9TS09KKjdbMPD2gM0g6zyMA+olCIbO5FABeoAziDI/VAVEeF15/eVy iHcYmCMGsrEuG55/hAE4nXClhGoeqvG5RcSYpVTzubeLlqpWZgFgFvYVnm3RdnzFNwvd jhbMlWxO0Wgxc2UTJ0rU38fJ/OpvyItLGu0wozBbVwF9llPnV2LZLqBvM1OvBPkOIso3 A7DA== X-Forwarded-Encrypted: i=1; AHgh+RrO0k7j8tzH2HczlWWrIg0I7rG5+olkyLQfWd2TFjdaNJZAZkzH+VR72Lw9vwLPf8qqR8zSW8ICRFkesuw=@vger.kernel.org X-Gm-Message-State: AOJu0YzuMIc0sDB25BQXCJXQsROtBzzu2x7au+n2gMDNFwMRkf1Ymcfz Lyv4tC6TUKMmP2RUTxLFSFsC59HfxwGFmOnAPmDwWwHUD3z7jcta4nZ/F7vzRgdgga55p9I6roP FHuEXHrDiF4CkeoIt3oa0iVH+ov9wS5M/e8Y4KlNjsc6DvfT9VQCBZhd/kIM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:995:b0:6ae:4d93:cdc2 with SMTP id 006d021491bc7-6b0c41b84f0mr4239106eaf.5.1786610557670; Thu, 13 Aug 2026 01:42:37 -0700 (PDT) Date: Thu, 13 Aug 2026 01:42:37 -0700 In-Reply-To: <6a7bbaa4.a2bb2777.31c27d.000b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7d837d.c5ad36c8.12f49d.002c.GAE@google.com> Subject: Re: [syzbot] [nvme?] WARNING in nvmet_fc_register_targetport From: syzbot To: cassel@kernel.org, hch@lst.de, justin.tee@broadcom.com, kch@nvidia.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, nareshgottumukkala83@gmail.com, paul.ely@broadcom.com, sagi@grimberg.me, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 3d6d817622b0 Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1119f479580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307 dashboard link: https://syzkaller.appspot.com/bug?extid=18b6b27f58e98c240814 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=174e8ac6580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+18b6b27f58e98c240814@syzkaller.appspotmail.com R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003 R13: 00007fe0eeb9c063 R14: 00007fe0eebc6cc0 R15: 0000000000000002 ------------[ cut here ]------------ !PageLargeKmalloc(page) WARNING: mm/slub.c:6602 at free_large_kmalloc+0xbf/0x100 mm/slub.c:6602, CPU#2: syz-executor838/6035 Modules linked in: CPU: 2 UID: 0 PID: 6035 Comm: syz-executor838 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:free_large_kmalloc+0xbf/0x100 mm/slub.c:6602 Code: 28 90 0f 0b 90 80 3d f7 c8 9a 0e 00 0f 84 87 b4 b5 fe 48 8b 74 24 28 48 89 ef e8 8c 3b 0c 00 b8 00 f0 ff ff 45 31 ed eb 9d 90 <0f> 0b 90 48 83 c4 08 48 89 df 48 c7 c6 53 4d 19 8e 5b 5d 41 5c 41 RSP: 0018:ffffc9000347fa28 EFLAGS: 00010202 RAX: 00000000000000ff RBX: ffffea00016377c0 RCX: 000000000000002e RDX: 0000000000000000 RSI: ffff888058ddff20 RDI: ffffea00016377c0 RBP: ffff888058ddff20 R08: ffff888052911000 R09: 00000000ffffffff R10: ffffffffffffffff R11: 0000000000000000 R12: 00000000ffffffff R13: 1ffff9200068ff5e R14: dead000000000122 R15: ffff888058ddff30 FS: 000055557f333400(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557f335768 CR3: 0000000058747000 CR4: 0000000000352ef0 Call Trace: nvmet_fc_alloc_ls_iodlist drivers/nvme/target/fc.c:569 [inline] nvmet_fc_register_targetport+0x114c/0x1c30 drivers/nvme/target/fc.c:1411 fcloop_create_target_port+0x156/0x5a0 drivers/nvme/target/fcloop.c:1558 dev_attr_store+0x58/0x80 drivers/base/core.c:2505 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe0eeb63277 Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007fffdd23d920 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000055557f333400 RCX: 00007fe0eeb63277 RDX: 000000000000002f RSI: 00007fffdd23d970 RDI: 0000000000000003 RBP: 00007fffdd23d970 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003 R13: 00007fe0eeb9c063 R14: 00007fe0eebc6cc0 R15: 0000000000000002 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.