From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 CC4391CD0C for ; Sat, 31 Aug 2024 18:54:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725130462; cv=none; b=VaMvleMao+tKYx1a4VzLju6aokEWnQDv5j94eB48n+nBr6M0u2N7L5/o1ND8qrf5ncL9rgi71jrIe+FIZ3zk8b/Fvq+Fd9Poc0OWHd8SPDI/HaNzpyKsT87EfTIr4E6cFkPRYy4wZRrMXj0O6wqnC0EDnOHNbT2rczaRUa68W+4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725130462; c=relaxed/simple; bh=Qdl0oIRce2Gtbf9OZesLMZfTekQhJhFACaBtP6+TswI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ie1MkJCiVIvL/FnLoab3i2y45130oPsWA69jgXcI0JGkEH+Vm68iI2pIaOXrceU3sEipjcJLNqB+dDLIhB6kpeMAVbBo/ZmJ8wFnP0TG6RTSGTBcOp1vGBiOuShc9iKXWISM3bccxUvQXFL8QEEwjMndZV90vx91KmnXmeHKyBU= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-39d4c656946so30944875ab.1 for ; Sat, 31 Aug 2024 11:54:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725130460; x=1725735260; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=FqN1lQszzxOP74sD9OtrYjx9lvH8sgwYB56fgBMgbJs=; b=SD6nZRAwLhfPYde8du0UkG+ZpBx6QlX24hYAAFYAuLL3ys3N49hJB21RbcA3YgdO6e zDY00z3Ps9hyaUbANb73uMVgocFqS0ZKDaRbOjvJ0mtbdZerGb+84hfNNkRvynUkyoJd +5e7xRNJnRI3rcm9VZ4KV4T9W6KxXoiRGLfZj82CSsp9qnykMJtvtEMKmY5W9lZeWyAT VmesLC8GKHMZZqg99pKXFyfKpNWSWrPbxLYis4qL3Y+htgLoIWz0oCDYIIJPh3xTVDKO gPjKWfdwsgcYNomJY2Zom+oZ5w8cYRM7kNJ3iq26PZpggCrlRlhdeqDmY8xJgn2sID58 MSwg== X-Forwarded-Encrypted: i=1; AJvYcCXiAzb8Ixo6Uvml/ySVYMbN3HEisYQBcEMANVCtifA3JTtskcOT6kRHrF3Qy82R377CG7gmxy2Jk1Oo4F4=@vger.kernel.org X-Gm-Message-State: AOJu0YzooHNP3tby7eSrzC0oyH++5KtQC3t72u8rR8jeNHOzibomRXmf GzM5EgMrhAhlQgyM3dyqnvKMJmNvxFPojNgqI/IKUvxT8B51q1Yv/HM9IUoHr3enaTSHnv9QUwA GOSNKg5yOJFnZHRN3f6JqHov7YcnQMwAif97O3MhRzhbL4MY2O7pUvGw= X-Google-Smtp-Source: AGHT+IE4Omf+gKQHzkvaWlcTGdTwJ2vO0gAuSs5EosQ1cGQCHxAxTYSJaDCuiWOf0KoUj/E+0/MbvjcwmH+32+lXXDrSOqLXMaK6 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20e7:b0:39a:ea21:1202 with SMTP id e9e14a558f8ab-39f410b5da6mr4186585ab.5.1725130459981; Sat, 31 Aug 2024 11:54:19 -0700 (PDT) Date: Sat, 31 Aug 2024 11:54:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004235960620ff3c77@google.com> Subject: [syzbot] [v9fs?] WARNING in p9_client_create From: syzbot To: asmadeus@codewreck.org, ericvh@kernel.org, linux-kernel@vger.kernel.org, linux_oss@crudebyte.com, lucho@ionkov.net, syzkaller-bugs@googlegroups.com, v9fs@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6f923748057a Add linux-next specific files for 20240827 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=117f47a7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=65c4a779aad2633f dashboard link: https://syzkaller.appspot.com/bug?extid=3c38ca819d922062d22a 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/4398d0ec73ed/disk-6f923748.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1f7e004ef90a/vmlinux-6f923748.xz kernel image: https://storage.googleapis.com/syzbot-assets/333e975a3aac/bzImage-6f923748.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3c38ca819d922062d22a@syzkaller.appspotmail.com ------------[ cut here ]------------ kmem_cache of name '9p-fcall-cache' already exists WARNING: CPU: 0 PID: 5316 at mm/slab_common.c:108 kmem_cache_sanity_check mm/slab_common.c:107 [inline] WARNING: CPU: 0 PID: 5316 at mm/slab_common.c:108 kmem_cache_create_usercopy+0xb6/0x370 mm/slab_common.c:311 Modules linked in: CPU: 0 UID: 0 PID: 5316 Comm: syz.1.7 Not tainted 6.11.0-rc5-next-20240827-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:kmem_cache_sanity_check mm/slab_common.c:107 [inline] RIP: 0010:kmem_cache_create_usercopy+0xb6/0x370 mm/slab_common.c:311 Code: 48 8b 6d 00 48 39 dd 74 25 48 8b 7d f8 4c 89 f6 e8 ff 16 dd 09 85 c0 75 e7 90 48 c7 c7 38 0a 0a 8e 4c 89 f6 e8 9b c1 79 ff 90 <0f> 0b 90 90 4c 89 f7 be 20 00 00 00 e8 59 18 dd 09 48 85 c0 0f 85 RSP: 0018:ffffc900040d77a8 EFLAGS: 00010246 RAX: 2c465ce8c6b42a00 RBX: ffffffff8ea1ba80 RCX: 0000000000040000 RDX: ffffc90004ba2000 RSI: 0000000000005a3c RDI: 0000000000005a3d RBP: ffff88802203e068 R08: ffffffff8155a5b2 R09: 1ffff9200081ae90 R10: dffffc0000000000 R11: fffff5200081ae91 R12: 0000000000020018 R13: 0000000000000000 R14: ffffffff8d2d3620 R15: 000000000000000b FS: 00007f80561806c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001000 CR3: 000000002b984000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: p9_client_create+0xb0b/0x1040 net/9p/client.c:1042 v9fs_session_init+0x1e4/0x1b80 fs/9p/v9fs.c:410 v9fs_mount+0xcf/0xaa0 fs/9p/vfs_super.c:122 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8055379e79 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:00007f8056180038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f8055515f80 RCX: 00007f8055379e79 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007f80553e793e R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8055515f80 R15: 00007ffc6f15d8c8 --- 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