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Date: Tue, 19 May 2015 09:07:05 +0800
From: Huang Ying <ying.huang@...el.com>
To: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [proc] 3668622c537: WARNING: CPU: 1 PID: 468 at
fs/proc/inode.c:439 proc_get_inode+0x10f/0x120()
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-testing
commit 3668622c537df68d542cf29e98c05527080e302a ("proc: Allow creating permanently empty directories.")
+----------------------------------------------+------------+------------+
| | de4e98aaa1 | 3668622c53 |
+----------------------------------------------+------------+------------+
| boot_successes | 20 | 0 |
| boot_failures | 0 | 10 |
| BUG:unable_to_handle_kernel | 0 | 10 |
| Oops | 0 | 10 |
| EIP_is_at_d_flags_for_inode | 0 | 10 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 10 |
| backtrace:vfs_fstatat | 0 | 10 |
| backtrace:SyS_fstatat64 | 0 | 10 |
| WARNING:at_fs/proc/inode.c:#proc_get_inode() | 0 | 4 |
+----------------------------------------------+------------+------------+
[main] Generating file descriptors
[main] Added 55 filenames from /dev
[ 16.021609] ------------[ cut here ]------------
[ 16.022022] WARNING: CPU: 1 PID: 468 at fs/proc/inode.c:439 proc_get_inode+0x10f/0x120()
[ 16.022794] Modules linked in:
[ 16.023049] CPU: 1 PID: 468 Comm: trinity-main Not tainted 4.1.0-rc3-00674-geb72c41 #273
[ 16.023679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 16.024451] 00000001 00000000 4eb49d80 4147e325 00000000 4eb49db4 41052541 41606c5c
[ 16.025218] 00000001 000001d4 41612420 000001b7 4117c45f 000001b7 4117c45f 4dd406fc
[ 16.025925] 524205d0 4dd4001c 4eb49dc4 410525ed 00000009 00000000 4eb49dd4 4117c45f
[ 16.026629] Call Trace:
[ 16.026852] [<4147e325>] dump_stack+0x48/0x60
[ 16.027210] [<41052541>] warn_slowpath_common+0x81/0xb0
[ 16.027598] [<4117c45f>] ? proc_get_inode+0x10f/0x120
[ 16.027975] [<4117c45f>] ? proc_get_inode+0x10f/0x120
[ 16.028370] [<410525ed>] warn_slowpath_null+0x1d/0x20
[ 16.028755] [<4117c45f>] proc_get_inode+0x10f/0x120
[ 16.029133] [<411802e1>] proc_lookup_de+0x41/0xa0
[ 16.029486] [<41180352>] proc_lookup+0x12/0x20
[ 16.029842] [<411322c2>] lookup_real+0x12/0x40
[ 16.030198] [<411329bd>] __lookup_hash+0x2d/0x40
[ 16.030547] [<41134180>] walk_component+0x120/0x630
[ 16.030914] [<41134cd9>] ? path_init+0x169/0x710
[ 16.031273] [<41135074>] ? path_init+0x504/0x710
[ 16.031622] [<411360fe>] path_lookupat+0x9e/0x370
[ 16.032019] [<4111da27>] ? slob_new_pages+0x17/0x40
[ 16.032451] [<411363ef>] filename_lookup+0x1f/0x70
[ 16.032811] [<41138f2b>] user_path_at_empty+0x3b/0x80
[ 16.033201] [<414833e8>] ? mutex_unlock+0x8/0x10
[ 16.033551] [<41138f8a>] user_path_at+0x1a/0x20
[ 16.033895] [<4112d8e8>] vfs_fstatat+0x48/0x90
[ 16.034248] [<4112e32e>] SyS_fstatat64+0x1e/0x40
[ 16.034601] [<4113c102>] ? SyS_getdents64+0x62/0xd0
[ 16.034969] [<4113be30>] ? filldir+0x100/0x100
[ 16.035321] [<414871f1>] ? syscall_exit+0x8/0x21
[ 16.035677] [<414871e5>] syscall_call+0x7/0x7
[ 16.036030] [<41480000>] ? __schedule+0x260/0xa40
[ 16.036403] ---[ end trace 57cb8cccefb5fecf ]---
[ 16.036764] BUG: unable to handle kernel NULL pointer dereference at (null)
Thanks,
Ying Huang
View attachment "config-4.1.0-rc1-00007-g3668622" of type "text/plain" (93698 bytes)
View attachment ".dmesg" of type "text/plain" (110275 bytes)
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