From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 7960625B666 for ; Mon, 10 Feb 2025 18:11:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739211082; cv=none; b=udURLdOXexJNz/fkD1WaICY2KhD+LvZnfBP0BwjfW8iUL5hTvufPGscdmQZKDsbvw/lrh2BkqtdehXZmJSmcnRG+/nIUH/UbCKEq2xgI95RVMzwDGq23OeQn3UIW4OAJXH10ht/VjKGo0nEUo5cIYhuzyr+NvD9j2rqnDl1ZJD4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739211082; c=relaxed/simple; bh=uGO1CdY++0LxTNG1UPJz1ESlgJkfuvMFfPrFf9UaGjY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=EdgTOjBgR8mZfcvNpdE7AhXNGTbEuCTlGJCqQJmW2cvuN2Nw5spT42yb1nCY0CgGS5F6KBUVFlpeWEvvDl370B2IU2upd0dFshEOU39vglS3WSqmIJbIgMAQww2QSlpwX4uu01M/ogRWcvyHLf2difMVvxmY2z1I3XNL/2ze7hc= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-3ce7b6225aeso87461035ab.0 for ; Mon, 10 Feb 2025 10:11:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739211079; x=1739815879; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ZuL72nu9kcv2bTXn3eChmkygmSBm5cQNmdbeFEmtP+E=; b=d7otcFfzVOaMiy1oz7LvUdPODsUMvGN3vCYQUk8QePCK0xUHOhZiO/WPlcparQKuCZ jd7sqLAI1VqsiRYup2BrdszcowDMXVk5Ix++q7RvS6xKgA2DGGlN4kKxu22fBV1yJkQy AVdnFrY5r55sW1CNJX+p4Hsqq6+J1AHsNE2fX4BHxe+9QQKNWDiVnQG2lh1x9rMNaFW0 qMt42CqcL1kQvY9ZsDZNJFXNH2dS6DCl7IAPgd/4LUl1oYLp4hAmm13yRD5L3ufp9CvF y8+S6+xYwco5jLjRJrzsQ79+PzHvteVHnYNaQQlDZ6vbQMprso1l+FlbKSlNsD71P9jO x0IA== X-Forwarded-Encrypted: i=1; AJvYcCU2Pc3cX8yHXTm9W1LgOwtjUO9HxA2UhGKPYViVQVIgo3KOLF/ZdnE8aGI9++uC52GJ7XEK9nzQIHdhYkw=@vger.kernel.org X-Gm-Message-State: AOJu0Yz4+jGhfjD/ZnnHPf04f8e4JaCiSVzQ0XK1GczUqkPVNdEA2088 SLjctsrTnXNnuETmIp+pD/rGksaLrBY2KPOMFEaTOm1+ZJC8m8eXio8upNacs+R3NoRP7QRcNtL 6NecusfDyu4oFeA7zANB/q3mTOU4+6H+k0Ryq+ULZh4QGFTwmKjFVKGU= X-Google-Smtp-Source: AGHT+IEEbNDtXVqnXaewfgLpfOm/xaG4kKq/xHWqN4CJ+FbBv6siCo/VcSMl6/DysKYcgKRoxVxLaSWsZcEoxPOh5qN1WDqi69RZ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:17ce:b0:3d0:1bc4:77a0 with SMTP id e9e14a558f8ab-3d13da22469mr122217325ab.0.1739211079624; Mon, 10 Feb 2025 10:11:19 -0800 (PST) Date: Mon, 10 Feb 2025 10:11:19 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67aa4147.050a0220.3d72c.0055.GAE@google.com> Subject: [syzbot] [net?] general protection fault in arp_create (3) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7ee983c850b4 Merge tag 'drm-fixes-2025-02-08' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127b61b0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=147b7d49d83b8036 dashboard link: https://syzkaller.appspot.com/bug?extid=3b1dd14b3a62374e75c7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/54ead761f64f/disk-7ee983c8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/95e57de2a045/vmlinux-7ee983c8.xz kernel image: https://storage.googleapis.com/syzbot-assets/d24a612a8ac7/bzImage-7ee983c8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3b1dd14b3a62374e75c7@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000016: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7] CPU: 1 UID: 0 PID: 3448 Comm: kworker/u8:9 Not tainted 6.14.0-rc1-syzkaller-00181-g7ee983c850b4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: bat_events batadv_bla_periodic_work RIP: 0010:arp_create+0x46/0x910 net/ipv4/arp.c:554 Code: 49 89 ce 89 54 24 3c 89 74 24 30 89 fb 49 bd 00 00 00 00 00 fc ff df e8 18 e6 62 f7 49 8d be b4 00 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 db 05 00 00 45 0f b7 a6 b4 00 00 00 49 RSP: 0018:ffffc9000c3a7870 EFLAGS: 00010203 RAX: 0000000000000016 RBX: 0000000000000002 RCX: ffff888031bcbc00 RDX: 0000000000000000 RSI: 0000000000000806 RDI: 00000000000000b4 RBP: ffffc9000c3a79f0 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff52001874f30 R12: ffffc9000c3a7aa0 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b41e61fa8 CR3: 000000007e55a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: batadv_bla_send_claim+0x16f/0xea0 net/batman-adv/bridge_loop_avoidance.c:361 batadv_bla_send_announce net/batman-adv/bridge_loop_avoidance.c:675 [inline] batadv_bla_periodic_work+0x5dc/0xaf0 net/batman-adv/bridge_loop_avoidance.c:1481 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:arp_create+0x46/0x910 net/ipv4/arp.c:554 Code: 49 89 ce 89 54 24 3c 89 74 24 30 89 fb 49 bd 00 00 00 00 00 fc ff df e8 18 e6 62 f7 49 8d be b4 00 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 db 05 00 00 45 0f b7 a6 b4 00 00 00 49 RSP: 0018:ffffc9000c3a7870 EFLAGS: 00010203 RAX: 0000000000000016 RBX: 0000000000000002 RCX: ffff888031bcbc00 RDX: 0000000000000000 RSI: 0000000000000806 RDI: 00000000000000b4 RBP: ffffc9000c3a79f0 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff52001874f30 R12: ffffc9000c3a7aa0 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b41e61fa8 CR3: 00000000348fa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 49 89 ce mov %rcx,%r14 3: 89 54 24 3c mov %edx,0x3c(%rsp) 7: 89 74 24 30 mov %esi,0x30(%rsp) b: 89 fb mov %edi,%ebx d: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 14: fc ff df 17: e8 18 e6 62 f7 call 0xf762e634 1c: 49 8d be b4 00 00 00 lea 0xb4(%r14),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 db 05 00 00 jne 0x612 37: 45 0f b7 a6 b4 00 00 movzwl 0xb4(%r14),%r12d 3e: 00 3f: 49 rex.WB --- 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 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