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Date: Mon, 14 Dec 2015 13:56:58 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Paul Gortmaker <paul.gortmaker@...driver.com>
CC: 0day robot <fengguang.wu@...el.com>
Subject: [lkp] [fs] 2e9d30b4bd: BUG: unable to handle kernel NULL pointer
dereference at 0000000000000018
FYI, we noticed the below changes on
git://internal_merge_and_test_tree revert-8ecb4258a962d2c917ed21e677a7032711c925bb-2e9d30b4bd5f390796313567371b70fbf1966e73
commit 2e9d30b4bd5f390796313567371b70fbf1966e73 ("fs: make hugetlbfs/inode.c explicitly non-modular")
+------------------------------------------------+------------+------------+
| | cb5bdfcd1a | 2e9d30b4bd |
+------------------------------------------------+------------+------------+
| boot_successes | 2 | 0 |
| boot_failures | 10 | 10 |
| IP-Config:Auto-configuration_of_network_failed | 10 | 2 |
| BUG:unable_to_handle_kernel | 0 | 8 |
| Oops | 0 | 8 |
| RIP:__lock_acquire | 0 | 8 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
| backtrace:do_mount | 0 | 8 |
| backtrace:SyS_mount | 0 | 8 |
+------------------------------------------------+------------+------------+
[ 9.212200] systemd-sysv-generator[126]: Ignoring K02urandom symlink in rc6.d, not generating urandom.service.
[ 9.212226] systemd-sysv-generator[126]: Ignoring K07hwclock.sh symlink in rc6.d, not generating hwclock.service.
[ 9.212258] systemd-sysv-generator[126]: Ignoring K01watchdog symlink in rc6.d, not generating watchdog.service.
[ 9.597704] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
[ 9.599081] IP: [<ffffffff928af8d3>] __lock_acquire+0x160/0x1a3f
[ 9.600030] PGD 1b6a7067 PUD 1b711067 PMD 0
[ 9.600942] Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
[ 9.601890] Modules linked in:
[ 9.602481] CPU: 0 PID: 139 Comm: mount Not tainted 4.4.0-rc4-00009-g2e9d30b #1
[ 9.603625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 9.604965] task: ffff88001bcc0000 ti: ffff88001b720000 task.ti: ffff88001b720000
[ 9.615944] RIP: 0010:[<ffffffff928af8d3>] [<ffffffff928af8d3>] __lock_acquire+0x160/0x1a3f
[ 9.617290] RSP: 0018:ffff88001b723890 EFLAGS: 00010002
[ 9.618092] RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000000
[ 9.619104] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
[ 9.620116] RBP: ffff88001b723960 R08: 0000000000000001 R09: 0000000000000001
[ 9.621157] R10: ffff88001b723980 R11: 0000000000001e27 R12: 0000000000000000
[ 9.622170] R13: ffff88001bcc0000 R14: 0000000000000018 R15: 0000000000000001
[ 9.623175] FS: 00007f77a46bb840(0000) GS:ffffffff93220000(0000) knlGS:0000000000000000
[ 9.624416] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9.625264] CR2: 0000000000000018 CR3: 000000001b703000 CR4: 00000000000006f0
[ 9.626268] Stack:
[ 9.626673] 0000000000000400 0000000000000002 ffff88001bcc0000 0000000000000002
[ 9.628089] ffffffff9297f5b7 0000000100000000 ffff880000000000 0000000000000000
[ 9.629496] ffff88001bcc0000 ffff880000000000 ffffffff928ae160 ffff88001bcc0000
[ 9.630941] Call Trace:
[ 9.631404] [<ffffffff9297f5b7>] ? deactivate_slab+0x41c/0x919
[ 9.632286] [<ffffffff928ae160>] ? mark_held_locks+0x5e/0x74
[ 9.633136] [<ffffffff9293b230>] ? get_page_from_freelist+0x819/0xd4f
[ 9.634082] [<ffffffff928b16f8>] lock_acquire+0x121/0x1c2
[ 9.634904] [<ffffffff928b16f8>] ? lock_acquire+0x121/0x1c2
[ 9.635739] [<ffffffff9297f5b7>] ? deactivate_slab+0x41c/0x919
[ 9.636622] [<ffffffff92de0cf2>] _raw_spin_lock+0x32/0x41
[ 9.637453] [<ffffffff9297f5b7>] ? deactivate_slab+0x41c/0x919
[ 9.638316] [<ffffffff9297f5b7>] deactivate_slab+0x41c/0x919
[ 9.639162] [<ffffffff92806479>] ? print_context_stack+0x6a/0xb6
[ 9.640040] [<ffffffff928a1b5e>] ? preempt_count_sub+0x34/0x3f
[ 9.640945] [<ffffffff92805e94>] ? dump_trace+0x28a/0x2a2
[ 9.641761] [<ffffffff929ffe1f>] ? hugetlbfs_alloc_inode+0x99/0xcc
[ 9.642667] [<ffffffff929ffe1f>] ? hugetlbfs_alloc_inode+0x99/0xcc
[ 9.643571] [<ffffffff92810e2f>] ? save_stack_trace+0x2a/0x45
[ 9.644441] [<ffffffff9297cdc8>] ? set_track+0x63/0xd9
[ 9.645247] [<ffffffff929802a8>] ___slab_alloc+0x60b/0x658
[ 9.646226] [<ffffffff9297f1a0>] ? deactivate_slab+0x5/0x919
[ 9.647112] [<ffffffff929802a8>] ? ___slab_alloc+0x60b/0x658
[ 9.648123] [<ffffffff929ffe1f>] ? hugetlbfs_alloc_inode+0x99/0xcc
[ 9.649058] [<ffffffff928aef23>] ? __lock_is_held+0x3b/0x56
[ 9.649917] [<ffffffff92980339>] __slab_alloc+0x44/0x78
[ 9.650955] [<ffffffff9297fca2>] ? ___slab_alloc+0x5/0x658
[ 9.651942] [<ffffffff92980339>] ? __slab_alloc+0x44/0x78
[ 9.653128] [<ffffffff929ffe1f>] ? hugetlbfs_alloc_inode+0x99/0xcc
[ 9.654030] [<ffffffff9298041d>] kmem_cache_alloc+0xb0/0x2e5
[ 9.654864] [<ffffffff929ffe1f>] ? hugetlbfs_alloc_inode+0x99/0xcc
[ 9.655749] [<ffffffff92a00110>] ? hugetlbfs_parse_options+0x2ae/0x2ae
[ 9.656911] [<ffffffff929ffe1f>] hugetlbfs_alloc_inode+0x99/0xcc
[ 9.657785] [<ffffffff92a00110>] ? hugetlbfs_parse_options+0x2ae/0x2ae
[ 9.658963] [<ffffffff929a25c1>] alloc_inode+0x1d/0x94
[ 9.659745] [<ffffffff929a403b>] new_inode_pseudo+0x11/0x58
[ 9.660580] [<ffffffff929a4098>] new_inode+0x16/0x2d
[ 9.661396] [<ffffffff92a00278>] hugetlbfs_fill_super+0x168/0x237
[ 9.662310] [<ffffffff92989670>] mount_nodev+0x64/0xa1
[ 9.663106] [<ffffffff929ffcbb>] hugetlbfs_mount+0x18/0x1a
[ 9.663943] [<ffffffff9298a500>] mount_fs+0x6c/0x1cd
[ 9.664708] [<ffffffff929a7329>] vfs_kern_mount+0x6a/0x156
[ 9.665539] [<ffffffff929ab018>] do_mount+0xab7/0xc77
[ 9.666319] [<ffffffff9294fb3b>] ? strndup_user+0x5c/0xa7
[ 9.667144] [<ffffffff929ab4b0>] SyS_mount+0xad/0xd9
[ 9.667917] [<ffffffff92de1b2f>] entry_SYSCALL_64_fastpath+0x12/0x76
[ 9.668853] Code: 03 00 00 48 c7 c7 73 d5 0c 93 e8 54 c3 fc ff eb 09 4d 85 e4 0f 85 64 01 00 00 45 31 e4 e9 cd 18 00 00 83 3d 83 57 99 00 00 74 12 <49> 81 3e 80 de 4b 93 b8 00 00 00 00 44 0f 44 f8 eb 03 45 31 ff
[ 9.675580] RIP [<ffffffff928af8d3>] __lock_acquire+0x160/0x1a3f
[ 9.676542] RSP <ffff88001b723890>
[ 9.677134] CR2: 0000000000000018
[ 9.677696] ---[ end trace e74ee0bf20d022ff ]---
[ 9.678415] Kernel panic - not syncing: Fatal exception
Thanks,
Ying Huang
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