From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinson Lee Subject: [PATCH stable request 3.10] vfs: Remove incorrect debugging WARN in prepend_path Date: Mon, 28 Sep 2015 16:17:29 -0700 Message-ID: <1443482250-30691-1-git-send-email-vlee@twopensource.com> Cc: linux-fsdevel@vger.kernel.org, Vinson Lee To: Alexander Viro , "Eric W. Biederman" , Ivan Delalande , Omar Sandoval , stable@vger.kernel.org Return-path: Received: from mail-pa0-f50.google.com ([209.85.220.50]:35984 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753063AbbI1XRm (ORCPT ); Mon, 28 Sep 2015 19:17:42 -0400 Received: by pablk4 with SMTP id lk4so89819126pab.3 for ; Mon, 28 Sep 2015 16:17:41 -0700 (PDT) Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Vinson Lee Hi. Please backport upstream 4.2 commit 93e3bce6287e1fb3e60d3324ed08555b5bbafa89 ("vfs: Remove incorrect debugging WARN in prepend_path") to stable kernel 3.10. This patch has already been backported to stable kernels 3.12, 3.13, 3.14, 3.16, 3.18, 4.0, and 4.1. The upstream patch does not apply cleanly and a backport is provided. This patch fixes 3.13 commit f48cfddc6729e ("vfs: In d_path don't call d_dname on a mount point"), but this patch was itself was backported in 3.10.28. This patch addresses this warning seen in 3.10.76. ------------[ cut here ]------------ WARNING: at fs/dcache.c:2576 prepend_path+0x12b/0x17c() Root dentry has weird name <> Modules linked in: sch_fq_codel sch_htb cls_basic act_mirred cls_u32 veth sch_ingress netconsole configfs ipv6 dm_multipath scsi_dh video sbs sbshc hed acpi_pad a parport_pc lp parport tcp_diag inet_diag ipmi_si ipmi_devintf ipmi_msghandler dell_rbu sg iTCO_wdt iTCO_vendor_support dcdbas igb i2c_algo_bit ptp pps_core i7cor ioatdma i2c_i801 shpchp i2c_core lpc_ich microcode dca mfd_core freq_table mperf ahci libahci libata sd_mod scsi_mod CPU: 9 PID: 13242 Comm: lsof Tainted: G D W 3.10.76 #1 0000000000000000 ffff880b28ef3da0 ffffffff8146857f ffff880b28ef3dd8 ffffffff8103cc01 ffff880b28ef3de8 ffff88060275fa20 ffff8803d4dbb740 ffff88060275fa00 0000000000000000 ffff880b28ef3e38 ffffffff8103cc65 Call Trace: [] dump_stack+0x19/0x1b [] warn_slowpath_common+0x65/0x7d [] warn_slowpath_fmt+0x4c/0x4e [] prepend_path+0x12b/0x17c [] d_path+0xd9/0x139 [] proc_pid_readlink+0x6e/0xd9 [] SyS_readlinkat+0x93/0xdc [] SyS_readlink+0x1b/0x1d [] system_call_fastpath+0x16/0x1b ---[ end trace a4b19d6c8a8b2eec ]--- Cheers, Vinson Eric W. Biederman (1): vfs: Remove incorrect debugging WARN in prepend_path fs/dcache.c | 9 --------- 1 files changed, 0 insertions(+), 9 deletions(-)