Bug 99441

Summary:	4.0.4 kernel BUG at lib/radix-tree.c:461 (call trace)
Product:	Memory Management	Reporter:	Dan (dan76)
Component:	Page Allocator	Assignee:	Andrew Morton (akpm)
Status:	RESOLVED OBSOLETE
Severity:	normal
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.0.4	Subsystem:
Regression:	No	Bisected commit-id:

Description Dan 2015-06-05 04:02:35 UTC

My system stalled (no keyboard, no mouse) and I got this:

Jun  5 00:41:00 tux kernel: [427295.519312] ------------[ cut here ]------------
Jun  5 00:41:00 tux kernel: [427295.519332] kernel BUG at lib/radix-tree.c:461!
Jun  5 00:41:00 tux kernel: [427295.519345] invalid opcode: 0000 [#1] PREEMPT SMP
Jun  5 00:41:00 tux kernel: [427295.519361] Modules linked in: af_packet nls_iso8859_1 nls_cp437 vfat fat ecb ecryptfs cbc hmac encrypted_keys i915 fbcon bitblit softcursor cfbfillrect cfbimgblt font i2c_algo_bit cfbcopyarea video backlight drm_kms_helper drm intel_gtt agpgart fb fbdev binfmt_misc nf_log_ipv4 nf_log_common xt_LOG xt_comment ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_state iptable_filter ip_tables x_tables tun e1000e ptp pps_core i2c_dev kvm_intel kvm autofs4 sr_mod cdrom nf_conntrack_ftp nf_conntrack snd_hda_codec_realtek snd_hda_codec_generic snd_hrtimer snd_pcm_oss snd_mixer_oss snd_hda_intel snd_hda_controller snd_hda_codec pcspkr hangcheck_timer thermal processor fan button coretemp w83627ehf hwmon_vid hwmon inet_lro rtc_cmos sha512_ssse3 sha512_generic sha256_ssse3 sha256_generic md5 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd microcode snd_usb_audio snd_hwdep snd_usbmidi_lib snd_rawmidi snd_seq_device snd_pcm snd_timer snd uas evdev s
Jun  5 00:41:00 tux kernel: undcore uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core hid_generic usbhid hid usb_storage uhci_hcd ehci_pci ehci_hcd usbcore usb_common unix
Jun  5 00:41:00 tux kernel: [427295.519726] CPU: 2 PID: 17085 Comm: Cache2 I/O Not tainted 4.0.4 #3
Jun  5 00:41:00 tux kernel: [427295.519742] Hardware name: System manufacturer System Product Name/P8Z68-V PRO GEN3, BIOS 3703 09/02/2014
Jun  5 00:41:00 tux kernel: [427295.519766] task: ffff8800d3937800 ti: ffff88008a674000 task.ti: ffff88008a674000
Jun  5 00:41:00 tux kernel: [427295.519784] RIP: 0010:[<ffffffff8120acf9>]  [<ffffffff8120acf9>] radix_tree_insert+0x69/0xe0
Jun  5 00:41:01 tux kernel: [427295.519809] RSP: 0018:ffff88008a677bb8  EFLAGS: 00010086
Jun  5 00:41:01 tux kernel: [427295.519823] RAX: ffff8801f66d2910 RBX: 0000000000000001 RCX: 00000000fffffffa
Jun  5 00:41:01 tux kernel: [427295.519840] RDX: 00000000ffffffff RSI: 0000000000000481 RDI: ffff88010388af58
Jun  5 00:41:01 tux kernel: [427295.519858] RBP: ffff88008a677be8 R08: ffff88021f295b00 R09: ffffffff81209e98
Jun  5 00:41:01 tux kernel: [427295.519875] R10: ffffea0006204780 R11: 0000000000000000 R12: ffffea0006204740
Jun  5 00:41:01 tux kernel: [427295.519893] R13: 0000000000000000 R14: ffff88010388af58 R15: 0000000000000000
Jun  5 00:41:01 tux kernel: [427295.519911] FS:  00007f124c142700(0000) GS:ffff88021f280000(0000) knlGS:0000000000000000
Jun  5 00:41:01 tux kernel: [427295.519931] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun  5 00:41:01 tux kernel: [427295.519946] CR2: 00007f125d616000 CR3: 00000001a592b000 CR4: 00000000000407e0
Jun  5 00:41:01 tux kernel: [427295.519963] Stack:
Jun  5 00:41:01 tux kernel: [427295.519969]  ffff8801f66d2910 ffff8801f66d2940 ffffea0006204740 ffff88010388af50
Jun  5 00:41:01 tux kernel: [427295.519991]  0000000000000481 ffff88010388af68 ffff88008a677c28 ffffffff810d9f30
Jun  5 00:41:01 tux kernel: [427295.520014]  00000000001492ad ffff88010388ae10 0000000000000481 0000000000000000
Jun  5 00:41:01 tux kernel: [427295.520036] Call Trace:
Jun  5 00:41:01 tux kernel: [427295.520046]  [<ffffffff810d9f30>] shmem_add_to_page_cache+0xd0/0xf0
Jun  5 00:41:01 tux kernel: [427295.520062]  [<ffffffff810da396>] shmem_getpage_gfp+0x446/0x7c0
Jun  5 00:41:01 tux kernel: [427295.520078]  [<ffffffff810cf7df>] ? balance_dirty_pages_ratelimited+0x1f/0x870
Jun  5 00:41:01 tux kernel: [427295.520096]  [<ffffffff810da744>] shmem_write_begin+0x34/0x60
Jun  5 00:41:01 tux kernel: [427295.520112]  [<ffffffff810c4c17>] generic_perform_write+0xa7/0x1b0
Jun  5 00:41:01 tux kernel: [427295.520128]  [<ffffffff8112e341>] ? generic_update_time+0x71/0xc0
Jun  5 00:41:02 tux kernel: [427295.520145]  [<ffffffff810c6dbf>] __generic_file_write_iter+0x2df/0x380
Jun  5 00:41:02 tux kernel: [427295.520162]  [<ffffffff810c6e98>] generic_file_write_iter+0x38/0xa0
Jun  5 00:41:02 tux kernel: [427295.520179]  [<ffffffff81112f5f>] new_sync_write+0x7f/0xb0
Jun  5 00:41:02 tux kernel: [427295.520194]  [<ffffffff811136df>] vfs_write+0xaf/0x210
Jun  5 00:41:02 tux kernel: [427295.520207]  [<ffffffff81114321>] SyS_write+0x41/0xb0
Jun  5 00:41:02 tux kernel: [427295.520222]  [<ffffffff813af44e>] ? int_check_syscall_exit_work+0x34/0x3d
Jun  5 00:41:02 tux kernel: [427295.520239]  [<ffffffff813af232>] system_call_fastpath+0x12/0x17
Jun  5 00:41:02 tux kernel: [427295.520254] Code: 75 60 48 8b 45 d8 4c 89 20 48 8b 45 d0 48 85 c0 74 78 83 40 04 01 83 e3 3f 48 8b 45 d0 48 0f a3 98 28 02 00 00 19 d2 85 d2 74 1f <0f> 0b 0f 1f 44 00 00 41 89 c5 48 83 c4 10 44 89 e8 5b 41 5c 41
Jun  5 00:41:02 tux kernel: [427295.520374] RIP  [<ffffffff8120acf9>] radix_tree_insert+0x69/0xe0
Jun  5 00:41:02 tux kernel: [427295.520391]  RSP <ffff88008a677bb8>
Jun  5 00:41:02 tux kernel: [427295.526840] ---[ end trace d8d99cf4e182fe5e ]---
Jun  5 00:41:02 tux kernel: [427295.526848] note: Cache2 I/O[17085] exited with preempt_count 2

Any hints?