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 7FC13C83F01 for ; Thu, 31 Aug 2023 14:13:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346291AbjHaONr (ORCPT ); Thu, 31 Aug 2023 10:13:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229877AbjHaONq (ORCPT ); Thu, 31 Aug 2023 10:13:46 -0400 Received: from mail-pl1-f206.google.com (mail-pl1-f206.google.com [209.85.214.206]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A905B8 for ; Thu, 31 Aug 2023 07:13:43 -0700 (PDT) Received: by mail-pl1-f206.google.com with SMTP id d9443c01a7336-1c0aaf4caaaso8479435ad.2 for ; Thu, 31 Aug 2023 07:13:43 -0700 (PDT) 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z16-20020a170903019000b001b50bd85aaamr1189889plg.1.1693491222913; Thu, 31 Aug 2023 07:13:42 -0700 (PDT) Date: Thu, 31 Aug 2023 07:13:42 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c5ab74060438a6f8@google.com> Subject: Re: [syzbot] [kernel?] general protection fault in netdev_register_kobject From: syzbot To: andriy.shevchenko@linux.intel.com Cc: andriy.shevchenko@linux.intel.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Thu, Aug 31, 2023 at 12:05:53AM -0700, syzbot wrote: >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: 2ee82481c392 Add linux-next specific files for 20230828 >> git tree: linux-next >> console+strace: https://syzkaller.appspot.com/x/log.txt?x=16ea87b7a80000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=e82a7781f9208c0d >> dashboard link: https://syzkaller.appspot.com/bug?extid=d2c31705e468a347e6db >> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=141c0267a80000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1585c0c0680000 >> >> Downloadable assets: >> disk image: https://storage.googleapis.com/syzbot-assets/30801702ce78/disk-2ee82481.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/8d9b67709145/vmlinux-2ee82481.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/47f8ef9bffd0/bzImage-2ee82481.xz >> >> The issue was bisected to: >> >> commit d21fdd07cea418c0d98c8a15fc95b8b8970801e7 >> Author: Andy Shevchenko >> Date: Thu Aug 17 09:12:21 2023 +0000 >> >> driver core: Return proper error code when dev_set_name() fails >> >> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16cefca8680000 >> final oops: https://syzkaller.appspot.com/x/report.txt?x=15cefca8680000 >> console output: https://syzkaller.appspot.com/x/log.txt?x=11cefca8680000 >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+d2c31705e468a347e6db@syzkaller.appspotmail.com >> Fixes: d21fdd07cea4 ("driver core: Return proper error code when dev_set_name() fails") >> >> RBP: 0000000000000002 R08: 00007ffd497ebaf6 R09: 0000000100000000 >> R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 >> R13: 00000000000f4240 R14: 00000000000162a9 R15: 00007ffd497ebd74 >> >> general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN >> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] >> CPU: 0 PID: 5057 Comm: syz-executor401 Not tainted 6.5.0-next-20230828-syzkaller #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 >> RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 >> Code: a3 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 >> RSP: 0018:ffffc90003abf058 EFLAGS: 00010282 >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 >> RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 >> RBP: ffffc90003abf0e8 R08: 0000000000000001 R09: 0000000000000000 >> R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003abf0e8 >> R13: 0000000000000cc0 R14: ffff8880142f8880 R15: 0000000000000001 >> FS: 0000555555e44380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 00007f8bf2d75fc4 CR3: 000000007211d000 CR4: 00000000003506f0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >> Call Trace: >> >> kvasprintf_const+0x25/0x190 lib/kasprintf.c:45 >> kobject_set_name_vargs+0x5a/0x130 lib/kobject.c:272 >> kobject_add_varg lib/kobject.c:366 [inline] >> kobject_add+0x12a/0x240 lib/kobject.c:424 >> device_add+0x290/0x1ac0 drivers/base/core.c:3560 >> netdev_register_kobject+0x183/0x3f0 net/core/net-sysfs.c:2044 >> register_netdevice+0xbcb/0x1490 net/core/dev.c:10133 >> macvlan_common_newlink+0x1102/0x1a40 drivers/net/macvlan.c:1545 >> rtnl_newlink_create net/core/rtnetlink.c:3485 [inline] >> __rtnl_newlink+0x1177/0x1940 net/core/rtnetlink.c:3705 >> rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3718 >> rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6444 >> netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 >> netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] >> netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 >> netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 >> sock_sendmsg_nosec net/socket.c:730 [inline] >> sock_sendmsg+0xd9/0x180 net/socket.c:753 >> ____sys_sendmsg+0x6ac/0x940 net/socket.c:2540 >> ___sys_sendmsg+0x135/0x1d0 net/socket.c:2594 >> __sys_sendmsg+0x117/0x1e0 net/socket.c:2623 >> do_syscall_x64 arch/x86/entry/common.c:50 [inline] >> do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 >> entry_SYSCALL_64_after_hwframe+0x63/0xcd >> RIP: 0033:0x7f8bf2d14ce9 >> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 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:00007ffd497ebd58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e >> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8bf2d14ce9 >> RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 >> RBP: 0000000000000002 R08: 00007ffd497ebaf6 R09: 0000000100000000 >> R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 >> R13: 00000000000f4240 R14: 00000000000162a9 R15: 00007ffd497ebd74 >> >> Modules linked in: >> ---[ end trace 0000000000000000 ]--- >> RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 >> Code: a3 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 >> RSP: 0018:ffffc90003abf058 EFLAGS: 00010282 >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 >> RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 >> RBP: ffffc90003abf0e8 R08: 0000000000000001 R09: 0000000000000000 >> R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003abf0e8 >> R13: 0000000000000cc0 R14: ffff8880142f8880 R15: 0000000000000001 >> FS: 0000555555e44380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 00005628e3c36050 CR3: 000000007211d000 CR4: 00000000003506f0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >> ---------------- >> Code disassembly (best guess): >> 0: a3 ac f7 48 8b 74 24 movabs %eax,0x480824748b48f7ac >> 7: 08 48 >> 9: 8b 14 24 mov (%rsp),%edx >> c: eb 89 jmp 0xffffff97 >> e: 90 nop >> f: f3 0f 1e fa endbr64 >> 13: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax >> 1a: fc ff df >> 1d: 48 89 fa mov %rdi,%rdx >> 20: 55 push %rbp >> 21: 48 c1 ea 03 shr $0x3,%rdx >> 25: 53 push %rbx >> 26: 48 83 ec 10 sub $0x10,%rsp >> * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction >> 2e: 48 89 fa mov %rdi,%rdx >> 31: 83 e2 07 and $0x7,%edx >> 34: 38 d0 cmp %dl,%al >> 36: 7f 04 jg 0x3c >> 38: 84 c0 test %al,%al >> 3a: 75 51 jne 0x8d >> 3c: 0f b6 07 movzbl (%rdi),%eax >> 3f: 89 .byte 0x89 >> >> >> --- >> 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. >> For information about bisection process see: https://goo.gl/tpsmEJ#bisection >> >> If the bug is already fixed, 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 bug's subsystems, reply with: >> #syz set subsystems: new-subsystem >> (See the list of subsystem names on the web dashboard) >> >> If the bug is a duplicate of another bug, reply with: >> #syz dup: exact-subject-of-another-report > > #syz dup: [syzbot] [kernel?] general protection fault in nfc_register_device can't find the dup bug > >> If you want to undo deduplication, reply with: >> #syz undup > > -- > With Best Regards, > Andy Shevchenko > >