From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f71.google.com (mail-ot1-f71.google.com [209.85.210.71]) (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 F198C1F94F for ; Sun, 11 Oct 2026 17:32:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791739960; cv=none; b=X+1KF+jX/fmVYDOBxCKbH+tNBTa8bxGt0XCGInRzcZdQEVvbJNCwbcOxbhpPbIqzIiH5GwK8mT/wj5tbliQDI9GScVl4d9gjPjiY5tGcpySpkQ74sKJee8yvZsU5J57VFw5W83akOTwsy6bPu3THIhtpG971XSmXTPUplsTgos4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791739960; c=relaxed/simple; bh=a0Q5gKd45HAxng1wxw0xu146vxANbRajAU1djMDLDhw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=OGrzfLUpbTtLyVm9Pm7ipMmXpk60wMYTULN5qk6viDw20VsAdcq68O1LgT8vXJ2OJh1lhC1i0kgC9fBdq2INJ7xc4uY6kM3UONJUBO6sGC1DyGUzJ2FaF/r1WUGZJ/kMhwhlgbGPT4Tm4BHYP5RqKSe/aHs62TPJU1/9V8dIv+Q= 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=209.85.210.71 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-ot1-f71.google.com with SMTP id 46e09a7af769-816cd7b7838so1947381a34.2 for ; Sun, 11 Oct 2026 10:32:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791739958; x=1792344758; 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=u0o4MtJdz+i7038O/zO8/MdLCh4dr9Ow4hnPcKqRLHE=; b=RKl1G5LiAY3vDPi+C1VdbEQmStlkd/BBT6rE/BcD4ZHS39zyPuNEPqWePlO3xb+2mt CNVFXAhjkZ0JE6kVbhi8rQEb0TDl6SxlPpE5PolScTWB6k99I+7a06OK0kf7XghqPWKI 5u8Hz2ZJKRfCeaxc+ytbOSskTBIy7ZzOqAYKBEHQlSYhjfzxK9EzV+jEiwj6OgDFkpMx hIPM7SXPVKUfXNPaW3eRaeemQbjem5R50tK3GWAb+9kIxtI1BKuekt5QQaKGRR02ZzMa yV/eBYvESPlAUleCx26WGj0WMhaIvLkqnTCc9dMCaUvCgSzTXuRAZ5CwdlICp/NRn16Q FNnw== X-Forwarded-Encrypted: i=1; AKwUvByW2cSjWV7CSSh00bVWy6slYizWHgj2e+VT40P0rbDzGV3Lh6PS4IpKkMSbc5B3pHNH2bBLhXbs7SL+ts8=@vger.kernel.org X-Gm-Message-State: AFq9FYJY48m8o7s1gou9Rt0nm3T00gcCVZiY/ECcCoTNp+RkppN6yXKm YFv/VTwmqVfttKbHwUUeofvUsfJP+CcCUuB6csJ7Eaf5Tz3iDpfCTfUaltjQyeM/6rVlNBUvPek VVaPzI0/10opD+Xi2HqhVYbQLQ2KeaHlDhHNZOgpd9pLj18DhnAaxTrV3UNE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1b97:b0:4f3:e98f:fa0b with SMTP id 5614622812f47-50c556bc9d7mr7201373b6e.5.1791739957943; Sun, 11 Oct 2026 10:32:37 -0700 (PDT) Date: Sun, 11 Oct 2026 10:32:37 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6acbc835.a150a118.27e199.003c.GAE@google.com> Subject: [syzbot] [nvme?] BUG: corrupted list in nvmet_fc_remove_port From: syzbot To: 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" Hello, syzbot found the following issue on: HEAD commit: a5ebb76233b7 Merge tag 'edac_urgent_for_v7.3_rc7' of git:/.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1494923e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=df4bbab1c2172b9f dashboard link: https://syzkaller.appspot.com/bug?extid=c98b21427617af7f547a compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=126a0f15580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166a0f15580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d24cfbd75fba/disk-a5ebb762.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d0874c703893/vmlinux-a5ebb762.xz kernel image: https://storage.googleapis.com/syzbot-assets/2a424fa32a7b/bzImage-a5ebb762.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c98b21427617af7f547a@syzkaller.appspotmail.com nvmet_tcp: enabling port 1 (127.0.0.1:4420) non-slab/vmalloc memory list_del corruption. prev->next should be ffff88802af3b020, but was 0000000000000000. (prev=ffffffff9aecd340) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:64! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5680 Comm: syz-executor403 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62 Code: e8 ab ea 37 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 6c b1 58 fd 49 8b 17 48 c7 c7 40 71 cc 8b 48 89 de 4c 89 f9 e8 a7 7a 4c fc 90 <0f> 0b 4c 89 f7 e8 7c ea 37 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 3d RSP: 0018:ffffc90004cdfc30 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff88802af3b020 RCX: 7d3c36a647dfae00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000201 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed101708490b R12: 1ffffffff35d9a68 R13: dffffc0000000000 R14: ffffffff85f7f740 R15: ffffffff9aecd340 FS: 0000555594721400(0000) GS:ffff8881249bb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555594721340 CR3: 0000000038dd8000 CR4: 00000000003526f0 Call Trace: __list_del_entry_valid include/linux/list.h:140 [inline] __list_del_entry include/linux/list.h:261 [inline] list_del include/linux/list.h:275 [inline] nvmet_fc_portentry_unbind drivers/nvme/target/fc.c:1281 [inline] nvmet_fc_remove_port+0x16b/0x320 drivers/nvme/target/fc.c:2927 nvmet_disable_port+0x13e/0x1f0 drivers/nvme/target/core.c:400 nvmet_port_subsys_drop_link+0x1e8/0x210 drivers/nvme/target/configfs.c:1123 configfs_unlink+0x44f/0x6b0 fs/configfs/symlink.c:258 vfs_unlink+0x27b/0x6e0 fs/namei.c:5678 filename_unlinkat+0x3d3/0x610 fs/namei.c:5748 __do_sys_unlinkat fs/namei.c:5777 [inline] __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5769 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: 0033:0x7f0ad400d8b9 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe650d4178 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000200000000780 RCX: 00007f0ad400d8b9 RDX: 0000000000000000 RSI: 0000200000000780 RDI: 00000000ffffff9c RBP: 00000000000f4240 R08: 0000000000000009 R09: 0000000000000009 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000014e22 R13: 00007ffe650d418c R14: 00007ffe650d41a0 R15: 00007ffe650d4190 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62 Code: e8 ab ea 37 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 6c b1 58 fd 49 8b 17 48 c7 c7 40 71 cc 8b 48 89 de 4c 89 f9 e8 a7 7a 4c fc 90 <0f> 0b 4c 89 f7 e8 7c ea 37 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 3d RSP: 0018:ffffc90004cdfc30 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff88802af3b020 RCX: 7d3c36a647dfae00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000201 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed101708490b R12: 1ffffffff35d9a68 R13: dffffc0000000000 R14: ffffffff85f7f740 R15: ffffffff9aecd340 FS: 0000555594721400(0000) GS:ffff8881249bb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555594721340 CR3: 0000000038dd8000 CR4: 00000000003526f0 --- 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 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. 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