From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f69.google.com (mail-ot1-f69.google.com [209.85.210.69]) (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 832AD501F28 for ; Mon, 7 Sep 2026 17:44:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788803082; cv=none; b=HocLGvy/X2dGlJ6HC/0zkYOWEUwIIKjczRF8NZsFqjjWRHpFxBJaL/SlAe3M5J21xAc1XEOq+C4jKQhtzjKk2SF68NgJATSi4tTFFV80P6LmzIv5/xXllIyTwhppEZqSjcTO2kekbRqxezxjn0xutKm9+ydypbPRSNAlIz4lTHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788803082; c=relaxed/simple; bh=dwXjejFJv5tlGv0J9+LLUDtwO8cNaUkpx0laAJuUUYQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Z/xGVQSSGV5+xFBZ/XFi4zw+l0vp9XUCI6R2P2pC8kivOrGBPK0mP6WT0EEVQGfI041BBnwDS8ecCQPCO1eAIazDEmjfts2BfspZ0WHZvhtrEoTbIJ+8ZK6WOuqhMEK3xtQwoKzp5yn22n9Ai5u37z4WGNtdVEymI/DiOib0ep8= 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=209.85.210.69 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-f69.google.com with SMTP id 46e09a7af769-7e9fc6dc091so3214270a34.2 for ; Mon, 07 Sep 2026 10:44:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788803079; x=1789407879; 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=2sjhS0G73w55DIgrkwQ0bKZaVvOoELn/wH46qXVmfI8=; b=AqM336wSYIRxla4tFLWIj14GhgqPIRd4jKCu0YMcf2pDPYK8uMRHDM9trQyBC/f1Ga /sK+hjRKxbrwYbYXWqaP8nNWcINKRUiut/tKNpmU31AgrwRphH25bALFiuTdOHZANUr7 4ajA/esvJk5UF54CKqdWDR9751tWR/yMmkfXEXTmZDucQf8EVEpmsbZhgmAXipqbhivr I/d6q9feo4NXGONd5ISNrqTyHR4FB0/RyZUjES6pGkQasTe0rLH03HfuxqLBGi67zSb5 LlUOXrQ4B3XyjFV+M3O4eGZZ+4Yrci3pGBVIdBtMzqxerOuLvwqOE326eGGZ8305j+3l 0/RQ== X-Gm-Message-State: AFuF++kIGhlAtMPR92a6LAhImM1AwQFbhBxESLjH6XaL/7C1tEYoNDjV x6QTatsR9jSRsYmbNkdf4SWXbgM2Z+sK7jVGew8Z9NB0u+1YjcOSUY0lR6pf0CdCPcGo1CTqCzK wcPEl99J4pOHFXM3/EKNvyPuEREbmle8TMiXkFbkL4wZdHTvH8ky7GFgmRMU= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:218:b0:6b7:46e9:9703 with SMTP id 006d021491bc7-6b746e9a293mr11894807eaf.51.1788803079355; Mon, 07 Sep 2026 10:44:39 -0700 (PDT) Date: Mon, 07 Sep 2026 10:44:39 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a9ef807.2bb5a69c.24b23c.0007.GAE@google.com> Subject: [syzbot] [nfs?] [net?] KASAN: vmalloc-out-of-bounds Read in rpc_queue_upcall From: syzbot To: linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: df2908090cda Linux 7.3-rc2 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=1416cc8e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f dashboard link: https://syzkaller.appspot.com/bug?extid=d5c77cabf7a3492aa650 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=14daa071580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d5c77cabf7a3492aa650@syzkaller.appspotmail.com vmalloc memory list_add corruption. prev->next should be next (ffff8880358a6c00), but was 0000000000000000. (prev=ffffc90003cbfa10). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:32! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 5997 Comm: syz-executor965 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:__list_add_valid_or_report+0xfb/0x130 lib/list_debug.c:32 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 3d 49 8b 55 00 4c 89 e9 48 89 de 48 c7 c7 c0 12 62 8c e8 d6 35 ee fb 90 <0f> 0b 4c 89 e7 e8 bb 38 4b fd e9 3a ff ff ff 4c 89 ef e8 ae 38 4b RSP: 0018:ffffc90003cbf938 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff8880358a6c00 RCX: 0000000000000000 RDX: 0000000000000075 RSI: ffffffff81ea06f9 RDI: fffff52000797f18 RBP: ffffc90003cbfa10 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000001 R11: 0000000000000001 R12: ffff8880358a6c08 R13: ffffc90003cbfa10 R14: ffff8880358a6c08 R15: ffffc90003cbfa10 FS: 00007f6eeac506c0(0000) GS:ffff8880d5d5d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbfc3d4000 CR3: 0000000026a53000 CR4: 0000000000352ef0 Call Trace: __list_add_valid include/linux/list.h:104 [inline] __list_add include/linux/list.h:169 [inline] list_add_tail include/linux/list.h:206 [inline] rpc_queue_upcall+0x2ff/0x530 net/sunrpc/rpc_pipe.c:142 __cld_pipe_upcall fs/nfsd/nfs4recover.c:668 [inline] cld_pipe_upcall fs/nfsd/nfs4recover.c:691 [inline] nfsd4_cld_grace_start fs/nfsd/nfs4recover.c:1305 [inline] nfsd4_cld_tracking_init+0x85a/0x10f0 fs/nfsd/nfs4recover.c:1494 nfsd4_client_tracking_init+0xe5/0x1c0 fs/nfsd/nfs4recover.c:1941 nfs4_state_start_net.cold+0xb7/0x480 fs/nfsd/nfs4state.c:9838 nfsd_startup_net fs/nfsd/nfssvc.c:391 [inline] nfsd_svc+0x54a/0x7d0 fs/nfsd/nfssvc.c:775 write_threads+0x316/0x600 fs/nfsd/nfsctl.c:438 nfsctl_transaction_write+0x106/0x1a0 fs/nfsd/nfsctl.c:114 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6eeaca601e Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007f6eeac501a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6eeac506c0 RCX: 00007f6eeaca601e RDX: 0000000000000002 RSI: 00007f6eeacf10e4 RDI: 0000000000000003 RBP: 0000000000000021 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffd0 R13: 0000000000000000 R14: 00007ffe260d9b80 R15: 00007ffe260d9c68 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid_or_report+0xfb/0x130 lib/list_debug.c:32 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 3d 49 8b 55 00 4c 89 e9 48 89 de 48 c7 c7 c0 12 62 8c e8 d6 35 ee fb 90 <0f> 0b 4c 89 e7 e8 bb 38 4b fd e9 3a ff ff ff 4c 89 ef e8 ae 38 4b RSP: 0018:ffffc90003cbf938 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff8880358a6c00 RCX: 0000000000000000 RDX: 0000000000000075 RSI: ffffffff81ea06f9 RDI: fffff52000797f18 RBP: ffffc90003cbfa10 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000001 R11: 0000000000000001 R12: ffff8880358a6c08 R13: ffffc90003cbfa10 R14: ffff8880358a6c08 R15: ffffc90003cbfa10 FS: 00007f6eeac506c0(0000) GS:ffff8880d5d5d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbfc3d4000 CR3: 0000000026a53000 CR4: 0000000000352ef0 --- 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