From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A031C636CC for ; Wed, 8 Feb 2023 16:00:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230075AbjBHQAt (ORCPT ); Wed, 8 Feb 2023 11:00:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229843AbjBHQAq (ORCPT ); Wed, 8 Feb 2023 11:00:46 -0500 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0319A8A60 for ; Wed, 8 Feb 2023 08:00:44 -0800 (PST) Received: by mail-io1-f69.google.com with SMTP id g6-20020a6b7606000000b007297c4996c7so10746868iom.13 for ; Wed, 08 Feb 2023 08:00:44 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=owLCGfndvEnfANmDmt4Szh/S5ZYNgPvGNXOVcbfFK/4=; b=yzYYRN3QFP6N8PGXZRS2Dj/py71gZQevi1SlnXrW5bJx/nvVkTLO4WNpkNu29u7cBh kjZgX0pp6Yv7wPSRR0V/Ji71+ufZdZvCHW0fierqYcI2rvnoMqWwCsO7UugJfyTjHGOZ KT9TZOU4w3cZhJgb5birtEfR3JFG2CDTBDUq/fbXTPZQk5qHbKIjj7Iewx1zdXQTveNW fqIDsr0MH3lXEuVDT5ryo2WNZD6K5wqZClY/2sOYH8Tl0J5MmAiO7lalRh97T8raWC4L a3Iwil2ILDMdEQ1BxGCqpaQRM4Xzubwq3Gvoy5MDzff0N1iIBrK+AawNg2S5Y2tvbioe wnfw== X-Gm-Message-State: AO0yUKW5VF5yVWOcV2+AkWiJtT5oMqzTHqqhBoXvQUSNka0A+GYP7BRn FeWaVPgY9YHYYoHshoO7KNvQeV48dNJ5/2QzhtCq35u6HcfD X-Google-Smtp-Source: AK7set8QDeVKVZSAVW5NeJBWPPMwxQ8OxU+TKZZwlFseudIegdhuOgP7yepTb1xsK3io05E+xkGjxCNjal1erZBTt3I1xFIotFSV MIME-Version: 1.0 X-Received: by 2002:a05:6602:81:b0:720:33b0:ae4c with SMTP id h1-20020a056602008100b0072033b0ae4cmr4010367iob.51.1675872044302; Wed, 08 Feb 2023 08:00:44 -0800 (PST) Date: Wed, 08 Feb 2023 08:00:44 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e3c8b405f4325d5e@google.com> Subject: [syzbot] general protection fault in kernfs_link_sibling (3) From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 38d2b86a665b Add linux-next specific files for 20230208 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11293d87480000 kernel config: https://syzkaller.appspot.com/x/.config?x=3691b32dd4410e01 dashboard link: https://syzkaller.appspot.com/bug?extid=c26da44ece0427e40573 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0a9d60e90514/disk-38d2b86a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/71311be5f1a1/vmlinux-38d2b86a.xz kernel image: https://storage.googleapis.com/syzbot-assets/a242870cc8eb/bzImage-38d2b86a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c26da44ece0427e40573@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 10023 Comm: syz-executor.4 Not tainted 6.2.0-rc7-next-20230208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:__rb_insert lib/rbtree.c:115 [inline] RIP: 0010:rb_insert_color+0x71/0x7a0 lib/rbtree.c:436 Code: 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 48 05 00 00 48 8b 2b 40 f6 c5 01 0f 85 81 01 00 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 01 05 00 00 4c 8b 75 08 49 39 de 0f 84 6d 01 RSP: 0018:ffffc900064b7610 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff8880228552f8 RCX: ffffc9000cdac000 RDX: 1ffff1100450ab9e RSI: ffff88801c5f6070 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 000000000f8bd940 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888022855cf0 R13: dffffc0000000000 R14: ffff888022855cb0 R15: 0000000000000000 FS: 00007f35ebeae700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32830000 CR3: 000000001cf73000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_link_sibling+0x2a7/0x470 fs/kernfs/dir.c:383 kernfs_add_one+0x210/0x4f0 fs/kernfs/dir.c:768 __kernfs_create_file+0x2a0/0x350 fs/kernfs/file.c:1076 sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x322/0xb80 fs/sysfs/group.c:148 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188 internal_create_groups fs/sysfs/group.c:184 [inline] sysfs_create_groups+0x29/0x50 fs/sysfs/group.c:214 device_add_groups drivers/base/core.c:2531 [inline] device_add_attrs drivers/base/core.c:2640 [inline] device_add+0x678/0x1e10 drivers/base/core.c:3388 netdev_register_kobject+0x185/0x400 net/core/net-sysfs.c:2015 register_netdevice+0xd77/0x1640 net/core/dev.c:10051 __ip_tunnel_create+0x398/0x5b0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1073 ops_init+0xb9/0x6b0 net/core/net_namespace.c:135 setup_net+0x793/0xe60 net/core/net_namespace.c:333 copy_net_ns+0x320/0x6b0 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3205 __do_sys_unshare kernel/fork.c:3276 [inline] __se_sys_unshare kernel/fork.c:3274 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3274 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f35eb08c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f35ebeae168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f35eb1abf80 RCX: 00007f35eb08c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000200 RBP: 00007f35eb0e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdbc64066f R14: 00007f35ebeae300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__rb_insert lib/rbtree.c:115 [inline] RIP: 0010:rb_insert_color+0x71/0x7a0 lib/rbtree.c:436 Code: 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 48 05 00 00 48 8b 2b 40 f6 c5 01 0f 85 81 01 00 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 01 05 00 00 4c 8b 75 08 49 39 de 0f 84 6d 01 RSP: 0018:ffffc900064b7610 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff8880228552f8 RCX: ffffc9000cdac000 RDX: 1ffff1100450ab9e RSI: ffff88801c5f6070 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 000000000f8bd940 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888022855cf0 R13: dffffc0000000000 R14: ffff888022855cb0 R15: 0000000000000000 FS: 00007f35ebeae700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32d36000 CR3: 000000001cf73000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 d8 mov %rbx,%rax 3: 48 c1 e8 03 shr $0x3,%rax 7: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) c: 0f 85 48 05 00 00 jne 0x55a 12: 48 8b 2b mov (%rbx),%rbp 15: 40 f6 c5 01 test $0x1,%bpl 19: 0f 85 81 01 00 00 jne 0x1a0 1f: 48 8d 7d 08 lea 0x8(%rbp),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 01 05 00 00 jne 0x536 35: 4c 8b 75 08 mov 0x8(%rbp),%r14 39: 49 39 de cmp %rbx,%r14 3c: 0f .byte 0xf 3d: 84 6d 01 test %ch,0x1(%rbp) --- This report is generated by a bot. 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