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Date: Tue, 18 Apr 2017 10:23:58 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Nicolai Stange <nicstange@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Johannes Berg <johannes@...solutions.net>,
"Paul E.McKenney" <paulmck@...ux.vnet.ibm.com>,
Nicolai Stange <nicstange@...il.com>,
linux-kernel@...r.kernel.org, lkp@...org
Subject: [lkp-robot] [debugfs] f3e7155d08: BUG:unable_to_handle_kernel
FYI, we noticed the following commit:
commit: f3e7155d085591ab58f0993ce633fea58c082b35 ("debugfs: implement per-file removal protection")
url: https://github.com/0day-ci/linux/commits/Nicolai-Stange/debugfs-per-file-removal-protection/20170416-175841
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------+------------+------------+
| | a2a6a4384e | f3e7155d08 |
+------------------------------------------+------------+------------+
| boot_successes | 4 | 2 |
| boot_failures | 2 | 4 |
| BUG:kernel_hang_in_test_stage | 2 | |
| BUG:unable_to_handle_kernel | 0 | 4 |
| Oops:#[##] | 0 | 4 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 4 |
+------------------------------------------+------------+------------+
[ 45.772683] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[ 45.772697] IP: __debugfs_remove+0x5c/0xc0
[ 45.772698] PGD 1fabb8067
[ 45.772699] PUD 1fa889067
[ 45.772700] PMD 0
[ 45.772700]
[ 45.772702] Oops: 0002 [#1] SMP
[ 45.772704] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sr_mod cdrom sg ata_generic pata_acpi ppdev snd_pcm snd_timer snd soundcore pcspkr ata_piix parport_pc serio_raw i2c_piix4 libata floppy parport acpi_cpufreq ip_tables
[ 45.772721] CPU: 1 PID: 9314 Comm: mount.nfs Not tainted 4.11.0-rc6-00202-gf3e7155 #1
[ 45.772722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 45.772724] task: ffff8801f9170000 task.stack: ffffc90006570000
[ 45.772726] RIP: 0010:__debugfs_remove+0x5c/0xc0
[ 45.772727] RSP: 0018:ffffc90006573798 EFLAGS: 00010246
[ 45.772729] RAX: 0000000000000000 RBX: ffff8802133b20c0 RCX: ffff88023fd1c270
[ 45.772730] RDX: ffffffff823bd720 RSI: ffffffff81c99fe0 RDI: 0000000000000018
[ 45.772731] RBP: ffffc900065737b0 R08: 0000000000000000 R09: 0000000000000246
[ 45.772732] R10: ffffc900065736b8 R11: ffff8802133b2900 R12: 0000000000000000
[ 45.772733] R13: ffff8802133b23c0 R14: ffffffff823bd724 R15: ffff8802133b2160
[ 45.772735] FS: 00007f4b07362880(0000) GS:ffff88023fd00000(0000) knlGS:0000000000000000
[ 45.772736] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 45.772737] CR2: 0000000000000010 CR3: 000000020acda000 CR4: 00000000000006e0
[ 45.772743] Call Trace:
[ 45.772750] debugfs_remove_recursive+0xd4/0x1e0
[ 45.772758] rpc_clnt_debugfs_unregister+0x19/0x30
[ 45.772762] rpc_client_register+0x18a/0x1c0
[ 45.772765] rpc_new_client+0x1de/0x2e0
[ 45.772768] rpc_create_xprt+0x58/0x170
[ 45.772769] rpc_create+0xea/0x1c0
[ 45.772776] nfs_create_rpc_client+0xe8/0x130
[ 45.772814] nfs4_init_client+0x7e/0x290 [nfsv4]
[ 45.772820] ? __radix_tree_replace+0x8a/0x140
[ 45.772823] ? radix_tree_iter_tag_clear+0x1c/0x20
[ 45.772827] ? __rpc_init_priority_wait_queue+0x81/0xb0
[ 45.772830] ? rpc_init_wait_queue+0x13/0x20
[ 45.772847] ? nfs4_alloc_client+0x1d2/0x1e0 [nfsv4]
[ 45.772849] nfs_get_client+0x32a/0x400
[ 45.772868] nfs4_set_client+0x86/0x100 [nfsv4]
[ 45.772884] nfs4_create_server+0x114/0x330 [nfsv4]
[ 45.772899] nfs4_remote_mount+0x2e/0x60 [nfsv4]
[ 45.772905] mount_fs+0x38/0x150
[ 45.772908] ? alloc_vfsmnt+0x1b2/0x230
[ 45.772910] vfs_kern_mount+0x67/0x140
[ 45.772925] nfs_do_root_mount+0x84/0xc0 [nfsv4]
[ 45.772940] nfs4_try_mount+0x44/0xd0 [nfsv4]
[ 45.772942] ? get_nfs_version+0x27/0x90
[ 45.772945] nfs_fs_mount+0x64a/0xd10
[ 45.772951] ? pcpu_alloc+0x2e4/0x640
[ 45.772953] ? nfs_clone_super+0x130/0x130
[ 45.772954] ? param_set_portnr+0x50/0x50
[ 45.772957] mount_fs+0x38/0x150
[ 45.772958] ? mount_fs+0x38/0x150
[ 45.772960] ? alloc_vfsmnt+0x1b2/0x230
[ 45.772962] vfs_kern_mount+0x67/0x140
[ 45.772964] do_mount+0x1bf/0xc70
[ 45.772968] ? kmem_cache_alloc_trace+0x131/0x1b0
[ 45.772970] SyS_mount+0x83/0xd0
[ 45.772975] entry_SYSCALL_64_fastpath+0x1a/0xa9
[ 45.772977] RIP: 0033:0x7f4b06a2098a
[ 45.772978] RSP: 002b:00007ffd3656cfa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
[ 45.772980] RAX: ffffffffffffffda RBX: 00000000025d6670 RCX: 00007f4b06a2098a
[ 45.772981] RDX: 00000000025d5f50 RSI: 00000000025d5f30 RDI: 00000000025d5f10
[ 45.772982] RBP: 00007ffd3656d000 R08: 00000000025d68b0 R09: 0000000000000041
[ 45.772983] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[ 45.772983] R13: 00007ffd3656cf60 R14: 00007ffd3656cff4 R15: 0000000000000003
[ 45.772985] Code: 8b 7c 24 30 48 89 de e8 f3 28 e6 ff 48 89 df e8 3b 22 e5 ff 4c 8b 63 78 48 c7 c2 20 d7 3b 82 48 c7 c6 e0 9f c9 81 49 8d 7c 24 18 <41> c7 44 24 10 00 00 00 00 4d 8d 6c 24 10 e8 a1 b6 cc ff 49 8d
[ 45.773008] RIP: __debugfs_remove+0x5c/0xc0 RSP: ffffc90006573798
[ 45.773009] CR2: 0000000000000010
[ 45.773109] ---[ end trace 01c0751f3e244643 ]---
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.11.0-rc6-00202-gf3e7155" of type "text/plain" (158075 bytes)
View attachment "job-script" of type "text/plain" (4083 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (35640 bytes)
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