Description of problem:

Kernel BUGS as put further down... 


Version-Release number of selected component (if applicable):

kernel-3.3.2-6.fc16.x86_64
condor-7.7.5-0.2.fc16.x86_64

How reproducible:

Not always, but often.

Steps to Reproduce: (this is guesswork, I cannot 100% reproduce it)

1. Run a condor compute node and enable job suspension on
   user activity. (I.e.: a compute job gets signal TSTP
   when other system activity happens, suspending the process(es)
   temporarily.
2. Set condor in such a way, that a 'job' (= collection of processes) 
   are killed after a certain time of being suspended.  Condor (in fact condor_procd)
   does this using the cgroup freezer mechanism, when available, afaik. 
3. Now when the 'job' gets killed, sometimes the whole machines
   hangs/crashed/needs a reboot.  
  
Actual results:

Apr 30 15:51:51 izar kernel: [960860.513694] ------------[ cut here ]------------
Apr 30 15:51:51 izar kernel: [960860.513779] kernel BUG at kernel/cgroup_freezer.c:243!
Apr 30 15:51:51 izar kernel: [960860.513861] invalid opcode: 0000 [#2] SMP 
Apr 30 15:51:51 izar kernel: [960860.513948] CPU 4 
Apr 30 15:51:51 izar kernel: [960860.513955] Modules linked in: ppdev parport_pc lp parport nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack sha256_generic dm_crypt snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel nvidia(PO) snd_hda_codec snd_hwdep snd_seq snd_seq_device nfsd snd_pcm lockd nfs_acl snd_timer auth_rpcgss snd e1000e soundcore iTCO_wdt sunrpc i7core_edac snd_page_alloc i2c_i801 iTCO_vendor_support edac_core microcode i2c_core uinput firewire_ohci firewire_core crc_itu_t [last unloaded: scsi_wait_scan]
Apr 30 15:51:51 izar kernel: [960860.514744] 
Apr 30 15:51:51 izar kernel: [960860.514820] Pid: 12105, comm: condor_procd Tainted: P      D    O 3.3.2-1.fc16.x86_64 #1 transtec AG /DP55WB
Apr 30 15:51:51 izar kernel: [960860.514989] RIP: 0010:[<ffffffff810c481b>]  [<ffffffff810c481b>] update_if_frozen+0x8b/0xd0
Apr 30 15:51:51 izar kernel: [960860.515152] RSP: 0018:ffff8801f478bdb8  EFLAGS: 00010097
Apr 30 15:51:51 izar kernel: [960860.515234] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff880138f4e418
Apr 30 15:51:51 izar kernel: [960860.515387] RDX: 0000000000000000 RSI: ffff8801f478bdc8 RDI: ffff8801b6376800
Apr 30 15:51:51 izar kernel: [960860.515541] RBP: ffff8801f478be08 R08: ffff8801b6376a50 R09: ffffc90008164000
Apr 30 15:51:51 izar kernel: [960860.517261] R10: 00000000ffffffff R11: 0000000000000246 R12: ffff8801b6376800
Apr 30 15:51:51 izar kernel: [960860.517414] R13: 0000000000000000 R14: 0000000000000002 R15: ffff880102387b00
Apr 30 15:51:51 izar kernel: [960860.517568] FS:  00007fa6296e1b40(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
Apr 30 15:51:51 izar kernel: [960860.517722] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 30 15:51:51 izar kernel: [960860.517804] CR2: 00007fa6281de000 CR3: 00000001fd860000 CR4: 00000000000006e0
Apr 30 15:51:51 izar kernel: [960860.517958] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 30 15:51:51 izar kernel: [960860.518111] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 30 15:51:51 izar kernel: [960860.518265] Process condor_procd (pid: 12105, threadinfo ffff8801f478a000, task ffff8801da334590)
Apr 30 15:51:51 izar kernel: [960860.518419] Stack:
Apr 30 15:51:51 izar kernel: [960860.518495]  0000000000001000 ffff8801dbce2e60 0000000000000000 ffff8801dbce3560
Apr 30 15:51:51 izar kernel: [960860.518665]  ffff8801b6376800 ffff8801b6376800 0000000000000000 ffff880102387b00
Apr 30 15:51:51 izar kernel: [960860.518834]  ffffffff810c4860 ffff8801f478be80 ffff8801f478be58 ffffffff810c48d5
Apr 30 15:51:51 izar kernel: [960860.519003] Call Trace:
Apr 30 15:51:51 izar kernel: [960860.519082]  [<ffffffff810c4860>] ? update_if_frozen+0xd0/0xd0
Apr 30 15:51:51 izar kernel: [960860.519164]  [<ffffffff810c48d5>] freezer_write+0x75/0x200
Apr 30 15:51:51 izar kernel: [960860.519246]  [<ffffffff810c4860>] ? update_if_frozen+0xd0/0xd0
Apr 30 15:51:51 izar kernel: [960860.519329]  [<ffffffff810c11be>] cgroup_file_write+0x1fe/0x2e0
Apr 30 15:51:51 izar kernel: [960860.519413]  [<ffffffff8114d4a8>] ? do_mmap_pgoff+0x348/0x360
Apr 30 15:51:51 izar kernel: [960860.519502]  [<ffffffff81269a0c>] ? security_file_permission+0x2c/0xb0
Apr 30 15:51:51 izar kernel: [960860.519595]  [<ffffffff81181653>] vfs_write+0xb3/0x180
Apr 30 15:51:51 izar kernel: [960860.519688]  [<ffffffff8118197a>] sys_write+0x4a/0x90
Apr 30 15:51:51 izar kernel: [960860.519770]  [<ffffffff815fc5a9>] system_call_fastpath+0x16/0x1b
Apr 30 15:51:51 izar kernel: [960860.519852] Code: 89 e7 e8 09 f7 ff ff 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 41 83 fe 01 74 0a 41 39 dd 74 d0 <0f> 0b 0f 1f 00 41 39 dd 75 c6 41 c7 47 20 02 00 00 00 eb bc 48 
Apr 30 15:51:51 izar kernel: [960860.520337] RIP  [<ffffffff810c481b>] update_if_frozen+0x8b/0xd0
Apr 30 15:51:51 izar kernel: [960860.520424]  RSP <ffff8801f478bdb8>
Apr 30 15:51:51 izar kernel: [960860.521362] ---[ end trace cea69b21df553451 ]---

Expected results:

No kernel bug..

Additional info:

Kernel is tainted, sorry for that.