Re: OCFS2 mainline state?

[Smart Weblications GmbH - Florian Wiessner]

Am 25.02.2013 21:33, schrieb Richard Weinberger:
> Hi!
> 
> Today I encountered the following problem on v3.8:
> [   28.940032] general protection fault: 0000 [#1] PREEMPT SMP
> ...
> [   28.984953] Call Trace:
> [   28.986628   [<ffffffffa04cb200>] ocfs2_fast_symlink_readpage+0x70/0x1b0 [ocfs2]
> [   28.988302]  [<ffffffff8110dc49>] ? add_to_page_cache_lru+0x29/0x40
> [   28.989942]  [<ffffffff8110ddca>] do_read_cache_page+0x7a/0x170
> [   28.991573]  [<ffffffff8110def4>] read_cache_page_async+0x14/0x20
> [   28.993212]  [<ffffffff8110df09>] read_cache_page+0x9/0x20
> [   28.994827]  [<ffffffff81170ae5>] page_getlink.isra.9+0x25/0x80
> [   28.996442]  [<ffffffff81170b61>] page_follow_link_light+0x21/0x40
> [   28.998049]  [<ffffffff8117090d>] generic_readlink+0x3d/0xa0
> [   28.999653]  [<ffffffff8116c0db>] sys_readlinkat+0xfb/0x130
> [   29.001246]  [<ffffffff8116c126>] sys_readlink+0x16/0x20
> [   29.002839]  [<ffffffff815d8dad>] system_call_fastpath+0x1a/0x1f
> 
> To my utter astonishment I found out that the issue is known since August 2012.
> And there is also a trivial fix for it.[0]
> The said fix found it's way into Oracle Unbreakable Linux very quickly,
> but not into mainline.[1]
> 
> Now I'm wondering how much Oracle really cares about OCFS2 in mainline?
> Maybe there are some more unfixed vulnerabilities?
> 

I noticed and reported this on 07.02.2013 but got no reply ;(


-- 

Mit freundlichen Grüßen,

Florian Wiessner

Smart Weblications GmbH
Martinsberger Str. 1
D-95119 Naila

fon.: +49 9282 9638 200
fax.: +49 9282 9638 205
24/7: +49 900 144 000 00 - 0,99 EUR/Min*
http://www.smart-weblications.de

--
Sitz der Gesellschaft: Naila
Geschäftsführer: Florian Wiessner
HRB-Nr.: HRB 3840 Amtsgericht Hof
*aus dem dt. Festnetz, ggf. abweichende Preise aus dem Mobilfunknetz
> --- Begin Message ---
> Hi All,
>
>
> Today i found a problem in linux 3.7.6 with ocfs2 when using ocfs2 from inside a
> chroot or linux-vserver guest. This problem also exists at least in 3.6.11.
>
> how to reproduce:
>
> node:~# cat /etc/debian_version
> 6.0.6
>
> node:~# rbd showmapped
> id pool image snap device
> 1  rbd  ocfs2 -    /dev/rbd1
>
> mounted ocfs2 fs on rdb device on /ocfs2:
> /dev/rbd1 on /ocfs2 type ocfs2 (rw,_netdev,noatime,data=writeback,heartbeat=local)
>
>
> mount --bind /ocfs2 /var/lib/vservers/www/ocfs2
> chroot /var/lib/vservers/www
>
>
> www:/# cat /etc/debian_version
> 5.0.10
>
> DocumentRoots for apache are on ocfs2
>
> /etc/init.d/apache2 start
>
>
> Then apache hangs and i have to reboot, see trace (annotated with addr2line
> where available):
>
> [  225.548824] general protection fault: 0000[#1] PREEMPT SMP
> [  225.549067] Modules linked in: ipt_REJECT xt_multiport arpt_mangle
> arptable_filter arp_tables ip6table_filter ip6_tables iptable_filter ip_tables
> ebtable_nat ebtables x_tables cpufreq_userspace cpufreq_powersave
> cpufreq_ondemand cpufreq_conservative ocfs2_stack_o2cb bridge stp llc bonding
> fuse ocfs2_dlm ocfs2_dlmfs dlm sctp ocfs2 ocfs2_nodemanager ocfs2_stackglue
> configfs rbd acpi_cpufreq mperf coretemp kvm_intel kvm psmouse serio_raw lpc_ich
> mfd_core i2c_i801 evdev i2c_core btrfs lzo_compress
> [  225.551698] CPU 1
> [  225.551755] Pid: 5888, comm: apache2 Not tainted 3.7.6 #1 Supermicro
> X9SCI/X9SCA/X9SCI/X9SCA
> [  225.551913] RIP: 0010:[<ffffffff81299f30>] [<ffffffff81299f30>]
> strnlen+0x10/0x19    /lib/string.c:405
> [  225.552059] RSP: 0018:ffff8808160a3b80  EFLAGS: 00010216
> [  225.552135] RAX: e8894402000000a5 RBX: e8894402000000a5 RCX: 000000000063ea4c
> [  225.552215] RDX: 000000000063ea4c RSI: 0000000000000f3f RDI: e8894402000000a5
> [  225.552294] RBP: ffffea00170650b8 R08: ffffffff810b8c7e R09: 0000000000000000
> [  225.552374] R10: ffff880816b50100 R11: ffff880816b50100 R12: ffff8806974afbf8
> [  225.552450] R13: 00000000000200da R14: 00000000000201da R15: 0000000000000000
> [  225.552530] FS:  00007eff6d9e2750(0000) GS:ffff88083fc40000(0000)
> knlGS:0000000000000000
> [  225.552625] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  225.552701] CR2: 00007fa71e7fbd40 CR3: 00000007f7849000 CR4: 00000000000407e0
> [  225.552778] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [  225.552858] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [  225.552938] Process apache2 (pid: 5888, threadinfo ffff8808160a2000, task
> ffff880816b50100)
> [  225.553032] Stack:
> [  225.553103]  ffffffffa06d7d27 ffffea00170650b8 ffff8806974afd38 ffffea00170650b8
> [  225.553408]  ffffffff810b8c7e 0000000000000000 ffff8806974afd38 ffffea00170650b8
> [  225.553711]  ffffffff810b8ddd ffff8808160a3ca8 ffffffffa06d7c20 ffff8806974d2440
> [  225.554016] Call Trace:
> [  225.554098] [<ffffffffa06d7d27>] ?
> ocfs2_fast_symlink_readpage+0x107/0x1a0[ocfs2]   ??:0
> [  225.554194] [<ffffffff810b8c7e>] ? add_to_page_cache_lru+0x2c/0x36
>         /include/linux/swap.h:253
> [  225.554272] [<ffffffff810b8ddd>] ? do_read_cache_page+0x8f/0x132
>         /mm/filemap.c:1802
> [  225.554359] [<ffffffffa06d7c20>] ? ocfs2_osb_debug_open+0x670/0x670[ocfs2]
>        ??:0
> [  225.554442] [<ffffffff810b8ebf>] ? read_cache_page+0x9/0x12
>         /mm/filemap.c:1921
> [  225.554521] [<ffffffff8110d1e1>] ? page_getlink+0x25/0x86
>         /fs/namei.c:3956
> [  225.554598] [<ffffffff8110d25d>] ? page_follow_link_light+0x1b/0x2c
>         /include/linux/namei.h:88
> [  225.554675] [<ffffffff8110e90c>] ? link_path_walk+0x400/0x7c5
>         /fs/namei.c:851
> [  225.554751] [<ffffffff8110f133>] ? path_lookupat+0x52/0x6cf
>         /fs/namei.c:1983
> [  225.554835] [<ffffffff8110f7d0>] ? filename_lookup+0x20/0x92
>         /fs/namei.c:2024
> [  225.554922] [<ffffffff81111a78>] ? getname_flags+0x70/0x146
>         /fs/namei.c:159
> [  225.554997] [<ffffffff81112376>] ? user_path_at_empty+0x49/0x7d
>         /fs/namei.c:2172
> [  225.555077] [<ffffffff8104dbee>] ? autoremove_wake_function+0x2a/0x2a
>         /kernel/wait.c:174
> [  225.555155] [<ffffffff811093d4>] ? cp_new_stat+0x10d/0x11f
>         /fs/stat.c:241
> [  225.555231] [<ffffffff811095d1>] ? vfs_fstatat+0x39/0x66
>         /fs/stat.c:89
> [  225.555314] [<ffffffff811096c8>] ? sys_newstat+0x11/0x2d
>         /fs/stat.c:248
> [  225.555402] [<ffffffff81542dd2>] ? system_call_fastpath+0x16/0x1b
>         /arch/x86/kernel/entry_64.S:645
> [  225.555480] Code: f6 82 30 a9 58 81 20 75 f1 c3 48 89 f8 eb 03 48 ff c0 80 38
> 00 75 f8 48 29 f8 c3 48 89 f8 eb 03 48 ff c0 48 85 f6 74 08 48 ff ce <80> 38 00
> 75 f0 48 29 f8 c3 31 c0 eb 14 44 38 c1 74 0c 48 ff c2
> [  225.559020] RIP [<ffffffff81299f30>] strnlen+0x10/0x19
>         /lib/string.c:405
> [  225.559143]  RSP <ffff8808160a3b80>
> [  225.559254] ---[ end trace 10bd8a6b280d52b1 ]---
>
> -- 
>
> Mit freundlichen Grüßen,
>
> Florian Wiessner
>
> Smart Weblications GmbH
> Martinsberger Str. 1
> D-95119 Naila
>
> fon.: +49 9282 9638 200
> fax.: +49 9282 9638 205
> 24/7: +49 900 144 000 00 - 0,99 EUR/Min*
> http://www.smart-weblications.de
>
> --
> Sitz der Gesellschaft: Naila
> Geschäftsführer: Florian Wiessner
> HRB-Nr.: HRB 3840 Amtsgericht Hof
> *aus dem dt. Festnetz, ggf. abweichende Preise aus dem Mobilfunknetz
> [  225.548824] general protection fault: 0000[#1] PREEMPT SMP
> [  225.549067] Modules linked in: ipt_REJECT xt_multiport arpt_mangle arptable_filter arp_tables ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables cpufreq_userspace cpufreq_powersave cpufreq_ondemand cpufreq_conservative ocfs2_stack_o2cb bridge stp llc bonding fuse ocfs2_dlm ocfs2_dlmfs dlm sctp ocfs2 ocfs2_nodemanager ocfs2_stackglue configfs rbd acpi_cpufreq mperf coretemp kvm_intel kvm psmouse serio_raw lpc_ich mfd_core i2c_i801 evdev i2c_core btrfs lzo_compress
> [  225.551698] CPU 1
> [  225.551755] Pid: 5888, comm: apache2 Not tainted 3.7.6 #1 Supermicro X9SCI/X9SCA/X9SCI/X9SCA
> [  225.551913] RIP: 0010:[<ffffffff81299f30>] [<ffffffff81299f30>] strnlen+0x10/0x19    /lib/string.c:405
> [  225.552059] RSP: 0018:ffff8808160a3b80  EFLAGS: 00010216
> [  225.552135] RAX: e8894402000000a5 RBX: e8894402000000a5 RCX: 000000000063ea4c
> [  225.552215] RDX: 000000000063ea4c RSI: 0000000000000f3f RDI: e8894402000000a5
> [  225.552294] RBP: ffffea00170650b8 R08: ffffffff810b8c7e R09: 0000000000000000
> [  225.552374] R10: ffff880816b50100 R11: ffff880816b50100 R12: ffff8806974afbf8
> [  225.552450] R13: 00000000000200da R14: 00000000000201da R15: 0000000000000000
> [  225.552530] FS:  00007eff6d9e2750(0000) GS:ffff88083fc40000(0000) knlGS:0000000000000000
> [  225.552625] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  225.552701] CR2: 00007fa71e7fbd40 CR3: 00000007f7849000 CR4: 00000000000407e0
> [  225.552778] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [  225.552858] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [  225.552938] Process apache2 (pid: 5888, threadinfo ffff8808160a2000, task ffff880816b50100)
> [  225.553032] Stack:
> [  225.553103]  ffffffffa06d7d27 ffffea00170650b8 ffff8806974afd38 ffffea00170650b8
> [  225.553408]  ffffffff810b8c7e 0000000000000000 ffff8806974afd38 ffffea00170650b8
> [  225.553711]  ffffffff810b8ddd ffff8808160a3ca8 ffffffffa06d7c20 ffff8806974d2440
> [  225.554016] Call Trace:
> [  225.554098] [<ffffffffa06d7d27>] ? ocfs2_fast_symlink_readpage+0x107/0x1a0[ocfs2]   ??:0         
> [  225.554194] [<ffffffff810b8c7e>] ? add_to_page_cache_lru+0x2c/0x36                   /include/linux/swap.h:253
> [  225.554272] [<ffffffff810b8ddd>] ? do_read_cache_page+0x8f/0x132                     /mm/filemap.c:1802
> [  225.554359] [<ffffffffa06d7c20>] ? ocfs2_osb_debug_open+0x670/0x670[ocfs2]          ??:0
> [  225.554442] [<ffffffff810b8ebf>] ? read_cache_page+0x9/0x12                          /mm/filemap.c:1921
> [  225.554521] [<ffffffff8110d1e1>] ? page_getlink+0x25/0x86                            /fs/namei.c:3956
> [  225.554598] [<ffffffff8110d25d>] ? page_follow_link_light+0x1b/0x2c                  /include/linux/namei.h:88
> [  225.554675] [<ffffffff8110e90c>] ? link_path_walk+0x400/0x7c5                        /fs/namei.c:851
> [  225.554751] [<ffffffff8110f133>] ? path_lookupat+0x52/0x6cf                          /fs/namei.c:1983
> [  225.554835] [<ffffffff8110f7d0>] ? filename_lookup+0x20/0x92                         /fs/namei.c:2024
> [  225.554922] [<ffffffff81111a78>] ? getname_flags+0x70/0x146                          /fs/namei.c:159
> [  225.554997] [<ffffffff81112376>] ? user_path_at_empty+0x49/0x7d                      /fs/namei.c:2172
> [  225.555077] [<ffffffff8104dbee>] ? autoremove_wake_function+0x2a/0x2a                /kernel/wait.c:174
> [  225.555155] [<ffffffff811093d4>] ? cp_new_stat+0x10d/0x11f                           /fs/stat.c:241
> [  225.555231] [<ffffffff811095d1>] ? vfs_fstatat+0x39/0x66                             /fs/stat.c:89
> [  225.555314] [<ffffffff811096c8>] ? sys_newstat+0x11/0x2d                             /fs/stat.c:248
> [  225.555402] [<ffffffff81542dd2>] ? system_call_fastpath+0x16/0x1b                    /arch/x86/kernel/entry_64.S:645
> [  225.555480] Code: f6 82 30 a9 58 81 20 75 f1 c3 48 89 f8 eb 03 48 ff c0 80 38 00 75 f8 48 29 f8 c3 48 89 f8 eb 03 48 ff c0 48 85 f6 74 08 48 ff ce <80> 38 00 75 f0 48 29 f8 c3 31 c0 eb 14 44 38 c1 74 0c 48 ff c2
> [  225.559020] RIP [<ffffffff81299f30>] strnlen+0x10/0x19                               /lib/string.c:405
> [  225.559143]  RSP <ffff8808160a3b80>
> [  225.559254] ---[ end trace 10bd8a6b280d52b1 ]---
>
> --- End Message ---