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 881042F2905 for ; Sat, 22 Nov 2025 06:18:23 +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=1763792305; cv=none; b=CLIcGrChPr2cQca5Y3OVE4AKQXtabglSw/ka1+Mpx92RX6dEqRtl1PsYUNd1WypLrFPAhvypr2BHSxHlPxHv6ZmS/MwLrh4xyJhZYwWzJu27kgqMhf5I/BIKEsi7hy0LQGCCU28xTEhvGOPl+HEaAEz0lyzmE2ZfTs8ORSZBbZE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763792305; c=relaxed/simple; bh=61ISVew+fXpRmH1C1Y656mxHW3h0nsiq7VI09YSbCzM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=IVGgwNft7PJ3+GMF93/eytPfku1ZgxQ+ByodzztoA+AKMIaey/ex3POj32nfCy6q+CSFvTUtx5jtionwKuavPvDm5ugQxyIj6hYcZ2JFoCxJ5MDWWkvGZf9Lw8eJP+fVPpuBuYlZBU9nm40ZfWEqSvuM8SH1+q/ULMS8rMafpWs= 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-434a83cd402so29072195ab.3 for ; Fri, 21 Nov 2025 22:18:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763792302; x=1764397102; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=cx2CX3aGUrGM9raSoyZTgw8xTbFs4q29h08+WotJOpw=; b=V1zy0H06HYJ0xjb/JCPbPi8n9NXU6x3emOLwqqokY6UkP1KbNXoL61ycOVIRti0tpm 0AD/9uzBldwwvHGrARFXfNSSFBA5Fb9C5PV16VO7aK0M/do+r+WX+Xbhf0s7IzajSs1F 4kMCFegU4O+FHGo0KrG8CaoC+osktnSZqB0M45bBBFsX3jpcCJ25j3LLqUUU6fiyzo82 3XRm3ug8dL1nvtLJxzuezvO8PBeNtAq9SK6sK8l9KrGRGCVe3CW5l98px9sb13mD1h+C OLPInj9x5V7PRSCFq8litynIMOn9aT7dABSzr5iDuNJJBgCB/ecK8lhqwGKFUxo0r/cb qkTw== X-Forwarded-Encrypted: i=1; AJvYcCXX3xf3KjYD7AElMuJbYKTyovW6KAJfaYI2FBxQ1QDvecGmxeeF/OuA/+3sM9Qx8g/4QsbRZw7TbzGf4XQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yy+BSJNwX/VIM4ycOE2EfENWac91RJTXiBNlLP9+MFRyYZkyFZP 3ILFRNofUbMltZR3dpq7TGzy5r/5NXH8IQMbdwvbezK6IE62bkE6jcY0IBMaYgMsA6450zXOWzY jHNjqvnHsG3Zw3I5Fa+aFiPOtQk63q0RAesKVQYi1uA3Qv92FYc4oqLpClyQ= X-Google-Smtp-Source: AGHT+IFpELT9jlrAt2e6ktz9APw6QW+8cOUbQ3YeIJHygWUqZSSdUYMgZdZYV4G5P6hKuJRPVwa5ooi0tvPSTVvUlBM8yNikqvb7 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:250c:b0:434:a88d:f819 with SMTP id e9e14a558f8ab-435b8bfa031mr44321685ab.2.1763792302642; Fri, 21 Nov 2025 22:18:22 -0800 (PST) Date: Fri, 21 Nov 2025 22:18:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <692155ae.050a0220.2ffa18.0007.GAE@google.com> Subject: [syzbot] [afs?] general protection fault in afs_request_key From: syzbot To: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, marc.dionne@auristor.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2eba5e05d9bc Merge tag 'loongarch-fixes-6.18-2' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15ad5a12580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1cd7f786c0f5182f dashboard link: https://syzkaller.appspot.com/bug?extid=41c68824eefb67cdf00c compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, 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/86850e631d99/disk-2eba5e05.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0a4e0560b906/vmlinux-2eba5e05.xz kernel image: https://storage.googleapis.com/syzbot-assets/3ff9e4ed22aa/bzImage-2eba5e05.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+41c68824eefb67cdf00c@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000024: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000120-0x0000000000000127] CPU: 0 UID: 0 PID: 8382 Comm: syz.3.612 Tainted: G U syzkaller #0 PREEMPT(full) Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:afs_request_key+0xba/0x190 fs/afs/security.c:30 Code: 48 c1 e9 03 80 3c 01 00 0f 85 ae 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 30 48 8d bd 20 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 01 00 75 7a 48 8b b5 20 01 00 00 31 c9 48 c7 c7 80 59 41 90 RSP: 0018:ffffc90004a7fc88 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888025b53000 RCX: 0000000000000024 RDX: ffff8880315b88c0 RSI: ffffffff83963434 RDI: 0000000000000120 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888025b53030 R13: ffff88802b8e6320 R14: ffffed100571cc66 R15: ffffc90004a7fea0 FS: 00007efe225c96c0(0000) GS:ffff888124a0d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30fbcff8 CR3: 0000000060a84000 CR4: 00000000003526f0 Call Trace: afs_validate_fc fs/afs/super.c:376 [inline] afs_get_tree+0x303/0x1380 fs/afs/super.c:555 vfs_get_tree+0x8e/0x340 fs/super.c:1758 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3642 [inline] do_new_mount fs/namespace.c:3718 [inline] path_mount+0x7b9/0x23a0 fs/namespace.c:4028 do_mount fs/namespace.c:4041 [inline] __do_sys_mount fs/namespace.c:4229 [inline] __se_sys_mount fs/namespace.c:4206 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4206 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efe2178f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efe225c9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007efe219e5fa0 RCX: 00007efe2178f749 RDX: 00002000000001c0 RSI: 0000200000000180 RDI: 0000000000000000 RBP: 00007efe21813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efe219e6038 R14: 00007efe219e5fa0 R15: 00007ffdcf161ca8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:afs_request_key+0xba/0x190 fs/afs/security.c:30 Code: 48 c1 e9 03 80 3c 01 00 0f 85 ae 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 30 48 8d bd 20 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 01 00 75 7a 48 8b b5 20 01 00 00 31 c9 48 c7 c7 80 59 41 90 RSP: 0018:ffffc90004a7fc88 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888025b53000 RCX: 0000000000000024 RDX: ffff8880315b88c0 RSI: ffffffff83963434 RDI: 0000000000000120 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888025b53030 R13: ffff88802b8e6320 R14: ffffed100571cc66 R15: ffffc90004a7fea0 FS: 00007efe225c96c0(0000) GS:ffff888124a0d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30f03ff8 CR3: 0000000060a84000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 48 c1 e9 03 shr $0x3,%rcx 4: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 8: 0f 85 ae 00 00 00 jne 0xbc e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 48 8b 6b 30 mov 0x30(%rbx),%rbp 1c: 48 8d bd 20 01 00 00 lea 0x120(%rbp),%rdi 23: 48 89 f9 mov %rdi,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) <-- trapping instruction 2e: 75 7a jne 0xaa 30: 48 8b b5 20 01 00 00 mov 0x120(%rbp),%rsi 37: 31 c9 xor %ecx,%ecx 39: 48 c7 c7 80 59 41 90 mov $0xffffffff90415980,%rdi --- 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