From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752677AbeC3UBE (ORCPT ); Fri, 30 Mar 2018 16:01:04 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:43000 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752455AbeC3UBD (ORCPT ); Fri, 30 Mar 2018 16:01:03 -0400 X-Google-Smtp-Source: AIpwx49ZNhP/S43ufYVaQ9JPBGcS54juGoIJmDK8OdaExXQk+JJklC2lvxvHI+RIjug5F62Kjaf8BkiRBXgtztev/sbRR/zkbR26 MIME-Version: 1.0 Date: Fri, 30 Mar 2018 13:01:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001f05330568a6b369@google.com> Subject: WARNING: kmalloc bug in bfs_fill_super From: syzbot To: aivazian.tigran@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit 9dd2326890d89a5179967c947dab2bab34d7ddee (Fri Mar 30 17:29:47 2018 +0000) Merge tag 'ceph-for-4.16-rc8' of git://github.com/ceph/ceph-client syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=71c6b5d68e91149fc8a4 So far this crash happened 2 times on upstream. C reproducer: https://syzkaller.appspot.com/x/repro.c?id=4931648743276544 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=5311241039904768 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6519557879496704 Kernel config: https://syzkaller.appspot.com/x/.config?id=-2760467897697295172 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+71c6b5d68e91149fc8a4@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. BFS-fs: bfs_fill_super(): loop0 is unclean, continuing WARNING: CPU: 1 PID: 4468 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4468 Comm: syzkaller458727 Not tainted 4.16.0-rc7+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012 RSP: 0018:ffff8801ad117908 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8801b904e004 RCX: ffffffff820931da RDX: 1ffff1003a1dfac4 RSI: 0000000000000000 RDI: 0000000000800000 RBP: ffff8801ad117908 R08: 1ffff10035a22e81 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000007fffff R13: ffff8801b904e000 R14: 00000000014080c0 R15: ffff8801d9194cc0 __do_kmalloc mm/slab.c:3701 [inline] __kmalloc+0x25/0x760 mm/slab.c:3715 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] bfs_fill_super+0x3d3/0xea0 fs/bfs/inode.c:362 mount_bdev+0x2b7/0x370 fs/super.c:1119 bfs_mount+0x34/0x40 fs/bfs/inode.c:465 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x442d3a RSP: 002b:00007ffd0d12ac38 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442d3a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd0d12ac40 RBP: 0000000000000004 R08: 0000000000000000 R09: 000000000000000a R10: 00000000c0ed0000 R11: 0000000000000297 R12: 0000000000401ba0 R13: 0000000000401c30 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.