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 Received: from aib29ajc255.phx1.oracleemaildelivery.com (aib29ajc255.phx1.oracleemaildelivery.com [192.29.103.255]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 86481C433EF for ; Mon, 6 Jun 2022 12:37:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; s=oss-phx-1109; d=oss.oracle.com; h=Date:To:From:Subject:Message-Id:MIME-Version:Sender; bh=iFsKIcUv6ciSTbrtRzg3oPdDD/h3bWASFoJ3oLw2To4=; b=fS0Y9Jlj8GPqjw4etsyXWpvPI5JrgqahyN0vrT7oSXBneCzbSgF8g1VBCdox2CNJOdiTt4qsGdof 45rDemPnxQhOmgJDpGdQEaPUgYqOCk+oBAmneHwR+fFIHk3P7/L10Pi5d6QgMeGvqX1AJnE4ZTpM SfkONWm3s1XkhMkao7/N63bEZbEgziXO7uAhlWnkL2GpaAFJQVNbrop217mhbsxgBpIBT2OF0TY1 4XFw7yXdO0X/3yI7UPtrNdqmZtDBbclyv3RyAysYWEBKHUO4/cRbMXdKqmQKy5+glzHFTQtCmOV0 UeXPNDVgOTcrTfAQabYVrgBu5NjBJmAs322wcg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; s=prod-phx-20191217; d=phx1.rp.oracleemaildelivery.com; h=Date:To:From:Subject:Message-Id:MIME-Version:Sender; bh=iFsKIcUv6ciSTbrtRzg3oPdDD/h3bWASFoJ3oLw2To4=; b=cnSx+CZuPHvQzuuVRteypUdW3ibvrL03/PkT4D1E1ekld432XkuV3tNZLK7eepAgQzhfTX6Z3eQJ iX7JIaCNAxjXu8YLxZTtE7aNux1qQciocQnIfhbFxzMhtQF+18u6eyoEYHJou7sATbwmo8U4XlKR bmKM+PpDqSIIacvqZLk866U5kXebgfkyP1f3aET2Q6c9XlgAC9N5GCye1wxFCqTMicgevfSDsOTt OwTVPcdbmGM8xCPcSE9/KrV/6gWWorFcpa2q9YE4Qucbx5vxWMebJMMAuuzLSJZCqDeTKEfAK/MZ vVwm/gbxoJhDxJBpQMjQ6LXvpVBHfZurLgbiEw== Received: by omta-ad3-fd3-302-us-phoenix-1.omtaad3.vcndpphx.oraclevcn.com (Oracle Communications Messaging Server 8.1.0.1.20220517 64bit (built May 17 2022)) with ESMTPS id <0RD200EEH32YS570@omta-ad3-fd3-302-us-phoenix-1.omtaad3.vcndpphx.oraclevcn.com> for ocfs2-devel@archiver.kernel.org; Mon, 06 Jun 2022 12:37:46 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654519054; bh=57OHv4llFwlGd53tOxDVK6aqhLONoJyONSNbPmPoJhQ=; h=Subject:To:Cc:From:Date:From; b=e0zPP0dIneDdcohyqFd7+BEknrZ9/UFQpWpZOlNJmOeA5IndPKBq6nGJMzQ7q9T2l FTOaWbhV6JiMy6atONb3T1GlGj+9TOcbble91LJaMHqe5M1Up48/fliAwgsWXXZc5u iu/IsLX8aDqH/LsFrheDwPMDAJ4c+Rpr8KFAMp5w= To: akpm@linux-foundation.org, gechangwei@live.cn, ghe@suse.com, gregkh@linuxfoundation.org, jiangqi903@gmail.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, junxiao.bi@oracle.com, mark@fasheh.com, ocfs2-devel@oss.oracle.com, piaojun@huawei.com Date: Mon, 06 Jun 2022 14:37:15 +0200 Message-id: <1654519035198111@kroah.com> MIME-version: 1.0 X-Source-IP: 139.178.84.217 X-Proofpoint-Virus-Version: vendor=nai engine=6400 definitions=10369 signatures=594849 X-Proofpoint-Spam-Details: rule=tap_notspam policy=tap score=0 malwarescore=0 mlxlogscore=999 adultscore=0 impostorscore=0 suspectscore=0 bulkscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 clxscore=185 mlxscore=0 priorityscore=191 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2206060058 Cc: stable-commits@vger.kernel.org Subject: [Ocfs2-devel] Patch "ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock" has been added to the 4.9-stable tree X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: gregkh--- via Ocfs2-devel Reply-to: gregkh@linuxfoundation.org Content-type: text/plain; charset="us-ascii" Content-transfer-encoding: 7bit Errors-to: ocfs2-devel-bounces@oss.oracle.com X-stable: commit X-Patchwork-Hint: ignore X-ServerName: dfw.source.kernel.org X-Proofpoint-SPF-Result: pass X-Proofpoint-SPF-Record: v=spf1 ip4:72.55.140.81 ip4:52.25.139.140 ip4:139.178.84.217 ip6:2604:1380:4641:c500::1 ip4:145.40.68.75 ip6:2604:1380:4601:e00::1 ip4:145.40.73.55 ip6:2604:1380:40e1:4800::1 include:_spf.google.com include:amazonses.com include:_spf.salesforce.com -all X-Spam: Clean X-Proofpoint-ORIG-GUID: -MHnf0eYa6puVdgbvZF1DgZbV9SthWgo X-Proofpoint-GUID: -MHnf0eYa6puVdgbvZF1DgZbV9SthWgo Reporting-Meta: AAHM2aMPhpw/rxSa+wdfjOKnsjHHnD0QUnDe+iWp2alUGixk0LPd6d7QUvSuoMf/ gX6oCebZdMmRqB2Eic9Bx5Odin1fEbt/Div4F9w5uagAJI8i0Xr66kBe15oJMGsh /HqnICwk0dvKpiegABpflH6fsrTedQmDU31+JZrjP29g4ry1nYyG2fra0sVjYG2f Mv8BujX6tmmmr4DGMOcI8Gm6oG1HFEeWw8Ky1mx0Sd3eTjfwKGS0JmIryWB0yFr+ CH9i5gKJ9GcaeY5V/UUzzuRY53lb9ZyZeOq1G+ZJM51HM2BjhCXwRhT2Ybjp7HMy csiCndDUllniEwkJP3z327B655Xyry30nDYDvN7tSdRTmWGM6litz9E97H5iEZOR aRidHK+OTRI2IWyFjp6DNkWHVHuzUT39y5o5lrOx0LFWxaHFJJ43q6uchF2i7uEs KrRGhYaDnB2mf4ClfPadt9NY5ri3YXN1yDpWWNxAzKlVyfmtyaavx2nN65KEFojk zDn8Qwx4DmiNEoda34aDqYKmzbAVcXKIOnUB+11RKtlkog== This is a note to let you know that I've just added the patch titled ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ocfs2-dlmfs-fix-error-handling-of-user_dlm_destroy_lock.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >From 863e0d81b6683c4cbc588ad831f560c90e494bef Mon Sep 17 00:00:00 2001 From: Junxiao Bi via Ocfs2-devel Date: Wed, 18 May 2022 16:52:24 -0700 Subject: ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock From: Junxiao Bi via Ocfs2-devel commit 863e0d81b6683c4cbc588ad831f560c90e494bef upstream. When user_dlm_destroy_lock failed, it didn't clean up the flags it set before exit. For USER_LOCK_IN_TEARDOWN, if this function fails because of lock is still in used, next time when unlink invokes this function, it will return succeed, and then unlink will remove inode and dentry if lock is not in used(file closed), but the dlm lock is still linked in dlm lock resource, then when bast come in, it will trigger a panic due to user-after-free. See the following panic call trace. To fix this, USER_LOCK_IN_TEARDOWN should be reverted if fail. And also error should be returned if USER_LOCK_IN_TEARDOWN is set to let user know that unlink fail. For the case of ocfs2_dlm_unlock failure, besides USER_LOCK_IN_TEARDOWN, USER_LOCK_BUSY is also required to be cleared. Even though spin lock is released in between, but USER_LOCK_IN_TEARDOWN is still set, for USER_LOCK_BUSY, if before every place that waits on this flag, USER_LOCK_IN_TEARDOWN is checked to bail out, that will make sure no flow waits on the busy flag set by user_dlm_destroy_lock(), then we can simplely revert USER_LOCK_BUSY when ocfs2_dlm_unlock fails. Fix user_dlm_cluster_lock() which is the only function not following this. [ 941.336392] (python,26174,16):dlmfs_unlink:562 ERROR: unlink 004fb0000060000b5a90b8c847b72e1, error -16 from destroy [ 989.757536] ------------[ cut here ]------------ [ 989.757709] kernel BUG at fs/ocfs2/dlmfs/userdlm.c:173! [ 989.757876] invalid opcode: 0000 [#1] SMP [ 989.758027] Modules linked in: ksplice_2zhuk2jr_ib_ipoib_new(O) ksplice_2zhuk2jr(O) mptctl mptbase xen_netback xen_blkback xen_gntalloc xen_gntdev xen_evtchn cdc_ether usbnet mii ocfs2 jbd2 rpcsec_gss_krb5 auth_rpcgss nfsv4 nfsv3 nfs_acl nfs fscache lockd grace ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs bnx2fc fcoe libfcoe libfc scsi_transport_fc sunrpc ipmi_devintf bridge stp llc rds_rdma rds bonding ib_sdp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm falcon_lsm_serviceable(PE) falcon_nf_netcontain(PE) mlx4_vnic falcon_kal(E) falcon_lsm_pinned_13402(E) mlx4_ib ib_sa ib_mad ib_core ib_addr xenfs xen_privcmd dm_multipath iTCO_wdt iTCO_vendor_support pcspkr sb_edac edac_core i2c_i801 lpc_ich mfd_core ipmi_ssif i2c_core ipmi_si ipmi_msghandler [ 989.760686] ioatdma sg ext3 jbd mbcache sd_mod ahci libahci ixgbe dca ptp pps_core vxlan udp_tunnel ip6_udp_tunnel megaraid_sas mlx4_core crc32c_intel be2iscsi bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi ipv6 cxgb3 mdio libiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ksplice_2zhuk2jr_ib_ipoib_old] [ 989.761987] CPU: 10 PID: 19102 Comm: dlm_thread Tainted: P OE 4.1.12-124.57.1.el6uek.x86_64 #2 [ 989.762290] Hardware name: Oracle Corporation ORACLE SERVER X5-2/ASM,MOTHERBOARD,1U, BIOS 30350100 06/17/2021 [ 989.762599] task: ffff880178af6200 ti: ffff88017f7c8000 task.ti: ffff88017f7c8000 [ 989.762848] RIP: e030:[] [] __user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs] [ 989.763185] RSP: e02b:ffff88017f7cbcb8 EFLAGS: 00010246 [ 989.763353] RAX: 0000000000000000 RBX: ffff880174d48008 RCX: 0000000000000003 [ 989.763565] RDX: 0000000000120012 RSI: 0000000000000003 RDI: ffff880174d48170 [ 989.763778] RBP: ffff88017f7cbcc8 R08: ffff88021f4293b0 R09: 0000000000000000 [ 989.763991] R10: ffff880179c8c000 R11: 0000000000000003 R12: ffff880174d48008 [ 989.764204] R13: 0000000000000003 R14: ffff880179c8c000 R15: ffff88021db7a000 [ 989.764422] FS: 0000000000000000(0000) GS:ffff880247480000(0000) knlGS:ffff880247480000 [ 989.764685] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 989.764865] CR2: ffff8000007f6800 CR3: 0000000001ae0000 CR4: 0000000000042660 [ 989.765081] Stack: [ 989.765167] 0000000000000003 ffff880174d48040 ffff88017f7cbd18 ffffffffc07d455f [ 989.765442] ffff88017f7cbd88 ffffffff816fb639 ffff88017f7cbd38 ffff8800361b5600 [ 989.765717] ffff88021db7a000 ffff88021f429380 0000000000000003 ffffffffc0453020 [ 989.765991] Call Trace: [ 989.766093] [] user_bast+0x5f/0xf0 [ocfs2_dlmfs] [ 989.766287] [] ? schedule_timeout+0x169/0x2d0 [ 989.766475] [] ? o2dlm_lock_ast_wrapper+0x20/0x20 [ocfs2_stack_o2cb] [ 989.766738] [] o2dlm_blocking_ast_wrapper+0x1a/0x20 [ocfs2_stack_o2cb] [ 989.767010] [] dlm_do_local_bast+0x46/0xe0 [ocfs2_dlm] [ 989.767217] [] ? dlm_lockres_calc_usage+0x4c/0x60 [ocfs2_dlm] [ 989.767466] [] dlm_thread+0xa31/0x1140 [ocfs2_dlm] [ 989.767662] [] ? __schedule+0x24a/0x810 [ 989.767834] [] ? __schedule+0x23e/0x810 [ 989.768006] [] ? __schedule+0x24a/0x810 [ 989.768178] [] ? __schedule+0x23e/0x810 [ 989.768349] [] ? __schedule+0x24a/0x810 [ 989.768521] [] ? __schedule+0x23e/0x810 [ 989.768693] [] ? __schedule+0x24a/0x810 [ 989.768893] [] ? __schedule+0x23e/0x810 [ 989.769067] [] ? __schedule+0x24a/0x810 [ 989.769241] [] ? wait_woken+0x90/0x90 [ 989.769411] [] ? dlm_kick_thread+0x80/0x80 [ocfs2_dlm] [ 989.769617] [] kthread+0xcb/0xf0 [ 989.769774] [] ? __schedule+0x24a/0x810 [ 989.769945] [] ? __schedule+0x24a/0x810 [ 989.770117] [] ? kthread_create_on_node+0x180/0x180 [ 989.770321] [] ret_from_fork+0x61/0x90 [ 989.770492] [] ? kthread_create_on_node+0x180/0x180 [ 989.770689] Code: d0 00 00 00 f0 45 7d c0 bf 00 20 00 00 48 89 83 c0 00 00 00 48 89 83 c8 00 00 00 e8 55 c1 8c c0 83 4b 04 10 48 83 c4 08 5b 5d c3 <0f> 0b 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 83 [ 989.771892] RIP [] __user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs] [ 989.772174] RSP [ 989.772704] ---[ end trace ebd1e38cebcc93a8 ]--- [ 989.772907] Kernel panic - not syncing: Fatal exception [ 989.773173] Kernel Offset: disabled Link: https://lkml.kernel.org/r/20220518235224.87100-2-junxiao.bi@oracle.com Signed-off-by: Junxiao Bi Reviewed-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Joseph Qi Cc: Changwei Ge Cc: Gang He Cc: Jun Piao Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/ocfs2/dlmfs/userdlm.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) --- a/fs/ocfs2/dlmfs/userdlm.c +++ b/fs/ocfs2/dlmfs/userdlm.c @@ -448,6 +448,11 @@ again: } spin_lock(&lockres->l_lock); + if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) { + spin_unlock(&lockres->l_lock); + status = -EAGAIN; + goto bail; + } /* We only compare against the currently granted level * here. If the lock is blocked waiting on a downconvert, @@ -614,7 +619,7 @@ int user_dlm_destroy_lock(struct user_lo spin_lock(&lockres->l_lock); if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) { spin_unlock(&lockres->l_lock); - return 0; + goto bail; } lockres->l_flags |= USER_LOCK_IN_TEARDOWN; @@ -628,12 +633,17 @@ int user_dlm_destroy_lock(struct user_lo } if (lockres->l_ro_holders || lockres->l_ex_holders) { + lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN; spin_unlock(&lockres->l_lock); goto bail; } status = 0; if (!(lockres->l_flags & USER_LOCK_ATTACHED)) { + /* + * lock is never requested, leave USER_LOCK_IN_TEARDOWN set + * to avoid new lock request coming in. + */ spin_unlock(&lockres->l_lock); goto bail; } @@ -644,6 +654,10 @@ int user_dlm_destroy_lock(struct user_lo status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK); if (status) { + spin_lock(&lockres->l_lock); + lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN; + lockres->l_flags &= ~USER_LOCK_BUSY; + spin_unlock(&lockres->l_lock); user_log_dlm_error("ocfs2_dlm_unlock", status, lockres); goto bail; } Patches currently in stable-queue which might be from ocfs2-devel@oss.oracle.com are queue-4.9/ocfs2-dlmfs-fix-error-handling-of-user_dlm_destroy_lock.patch _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel