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Message-ID: <20190831130917.ea4yx4uo5uttxk6l@inn2.lkp.intel.com>
Date: Sat, 31 Aug 2019 21:09:17 +0800
From: kernel test robot <lkp@...el.com>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: LKML <linux-kernel@...r.kernel.org>,
Al Viro <viro@...iv.linux.org.uk>,
linux-fsdevel@...r.kernel.org, lkp@...org
Subject: [fs/namei.c] e013ec23b8: WARNING:at_fs/dcache.c:#dentry_free
FYI, we noticed the following commit (built with gcc-7):
commit: e013ec23b8231cf7f95605cbb0e47aa0e3d047a4 ("fs/namei.c: keep track of nd->root refcount status")
https://kernel.googlesource.com/pub/scm/linux/kernel/git/viro/vfs.git work.namei
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------------+------------+------------+
| | ee594bfff3 | e013ec23b8 |
+------------------------------------------------+------------+------------+
| boot_successes | 10 | 0 |
| boot_failures | 0 | 27 |
| general_protection_fault:#[##] | 0 | 12 |
| RIP:dput | 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 24 |
| BUG:soft_lockup-CPU##stuck_for#s | 0 | 3 |
| RIP:native_queued_spin_lock_slowpath | 0 | 3 |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 0 | 3 |
| BUG:kernel_NULL_pointer_dereference,address | 0 | 12 |
| Oops:#[##] | 0 | 12 |
| RIP:inode_permission | 0 | 12 |
| WARNING:at_fs/dcache.c:#dentry_free | 0 | 1 |
| RIP:dentry_free | 0 | 1 |
+------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 13.886602] WARNING: CPU: 0 PID: 541 at fs/dcache.c:338 dentry_free+0x7f/0x90
[ 13.889208] Modules linked in:
[ 13.890276] CPU: 0 PID: 541 Comm: readlink Not tainted 5.3.0-rc1-00008-ge013ec23b8231 #1
[ 13.892699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 13.895419] RIP: 0010:dentry_free+0x7f/0x90
[ 13.896739] Code: f0 75 cb 48 8d be b0 00 00 00 48 83 c4 08 48 c7 c6 60 8d cd a5 e9 51 69 e4 ff 48 89 3c 24 48 c7 c7 f8 a9 cb a6 e8 7f 37 e3 ff <0f> 0b 48 8b 34 24 eb 8f 66 0f 1f 84 00 00 00 00 00 66 66 66 66 90
[ 13.901957] RSP: 0018:ffffb5524063fe38 EFLAGS: 00010282
[ 13.903527] RAX: 0000000000000024 RBX: ffff9941878040c0 RCX: ffffffffa706aa08
[ 13.905566] RDX: 0000000000000000 RSI: 0000000000000096 RDI: 0000000000000246
[ 13.907612] RBP: 0000000000000000 R08: 0000000000000280 R09: 0000000000000033
[ 13.909664] R10: 0000000000000000 R11: ffffb5524063fce8 R12: ffff994187804118
[ 13.911711] R13: ffff99427a810000 R14: ffff994187d7c8f0 R15: ffff99427a810b80
[ 13.913753] FS: 0000000000000000(0000) GS:ffff9942bfc00000(0000) knlGS:0000000000000000
[ 13.916187] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 13.917892] CR2: 000000000937458b CR3: 000000006800a000 CR4: 00000000000006f0
[ 13.919925] Call Trace:
[ 13.920840] __dentry_kill+0x13c/0x1a0
[ 13.922076] path_put+0x12/0x20
[ 13.923148] free_fs_struct+0x1b/0x30
[ 13.924346] do_exit+0x304/0xc40
[ 13.925438] ? __schedule+0x25d/0x670
[ 13.926642] do_group_exit+0x3a/0xa0
[ 13.927817] __ia32_sys_exit_group+0x14/0x20
[ 13.929160] do_fast_syscall_32+0xa9/0x340
[ 13.930565] entry_SYSENTER_compat+0x7f/0x91
[ 13.931924] ---[ end trace 02c6706eb2c2ebf2 ]---
To reproduce:
# build kernel
cd linux
cp config-5.3.0-rc1-00008-ge013ec23b8231 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Oliver Sang
View attachment "config-5.3.0-rc1-00008-ge013ec23b8231" of type "text/plain" (199532 bytes)
View attachment "job-script" of type "text/plain" (4667 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (13564 bytes)
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