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 X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7ACEBC2BA83 for ; Fri, 7 Feb 2020 17:28:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 566D32082E for ; Fri, 7 Feb 2020 17:28:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727465AbgBGR2O (ORCPT ); Fri, 7 Feb 2020 12:28:14 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:33790 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726901AbgBGR2O (ORCPT ); Fri, 7 Feb 2020 12:28:14 -0500 Received: by mail-io1-f70.google.com with SMTP id i8so134229ioi.0 for ; Fri, 07 Feb 2020 09:28:13 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=W63ahMeKAoR2+ngyjzVUzuW+ArlTdmK9l5iWyjmZIq4=; b=P6YxcFhRlkkGbA3wJ8H9VNCK2igi/AIWLWRcxCFA53TL8gqMqelKthMUmUD73Onzqt 92wZ2iLPPyulSYsmGddwm7lRUOQOy+UTVNbDyI+8q2TzveG7si6lVZnXmpdjLZaNi+0Z NRkLmQ9Mge1Du40vwY3uyMKmZX08o2TQE9N8TEGFohswfOs3xd+Y7Ndpu+16uhK4QZhQ H4xVHNg6un6dOP9/Z1/OXDhJGlTcpJ7ZDya5as4N2wcylhOlcIXQZABU+bvs3n4qG/tv bCz8TyIw4y3Kbws4Qhfr951rwBJv/RQf9+9ig1fEIBNEuHE3ZevJPm1C6mNXOVWk9jDu i7Sw== X-Gm-Message-State: APjAAAW+v+18FzsWy9GEv9zSQbDpjiVzpC6sA3vOZxSeddqUDpZ+ACoT G1sYXiMCc+pSMoJa+o/sCcFyfdp7SCmI99670HJsCtcI1lCw X-Google-Smtp-Source: APXvYqwEh9lgosP+ZBBHmuXoEJ8mg3fo/tiMaBTWqs2Fddp9hM/GpnUDHlrR9f+tNwP4WEpc/KQZNAmVVXrqXSKGL1pvEcf7kp6m MIME-Version: 1.0 X-Received: by 2002:a92:79c4:: with SMTP id u187mr454535ilc.92.1581096493420; Fri, 07 Feb 2020 09:28:13 -0800 (PST) Date: Fri, 07 Feb 2020 09:28:13 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d895bd059dffb65c@google.com> Subject: BUG: sleeping function called from invalid context in __kmalloc From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 90568ecf Merge tag 'kvm-5.6-2' of git://git.kernel.org/pub.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=107413bee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=69fa012479f9a62 dashboard link: https://syzkaller.appspot.com/bug?extid=98704a51af8e3d9425a9 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+98704a51af8e3d9425a9@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at mm/slab.h:565 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 12445, name: syz-executor.1 1 lock held by syz-executor.1/12445: #0: ffffffff89310218 (sb_lock){+.+.}, at: spin_lock include/linux/spinlock.h:338 [inline] #0: ffffffff89310218 (sb_lock){+.+.}, at: sget_fc+0xdc/0x640 fs/super.c:521 Preemption disabled at: [] spin_lock include/linux/spinlock.h:338 [inline] [] sget_fc+0xdc/0x640 fs/super.c:521 CPU: 0 PID: 12445 Comm: syz-executor.1 Not tainted 5.5.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 ___might_sleep+0x449/0x5e0 kernel/sched/core.c:6800 __might_sleep+0x8f/0x100 kernel/sched/core.c:6753 slab_pre_alloc_hook mm/slab.h:565 [inline] slab_alloc mm/slab.c:3306 [inline] __do_kmalloc mm/slab.c:3654 [inline] __kmalloc+0x6f/0x340 mm/slab.c:3665 kmalloc include/linux/slab.h:560 [inline] path_remove_extra_slash+0xae/0x2a0 fs/ceph/super.c:495 compare_mount_options fs/ceph/super.c:553 [inline] ceph_compare_super+0x1d4/0x560 fs/ceph/super.c:1052 sget_fc+0x139/0x640 fs/super.c:524 ceph_get_tree+0x467/0x1540 fs/ceph/super.c:1127 vfs_get_tree+0x8b/0x2a0 fs/super.c:1547 do_new_mount fs/namespace.c:2822 [inline] do_mount+0x18ee/0x25a0 fs/namespace.c:3142 __do_sys_mount fs/namespace.c:3351 [inline] __se_sys_mount+0xdd/0x110 fs/namespace.c:3328 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3328 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b399 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f77dba0ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f77dba0f6d4 RCX: 000000000045b399 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 0000000020000040 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000745 R14: 00000000004c8c38 R15: 000000000075c07c ceph: No mds server is up or the cluster is laggy --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.