This is my function : static spinlock_t xgr_learn_lock = SPIN_LOCK_UNLOCKED; static int piga_seq_cpt = 1; /* * Function called for each systemcall (Hook SELinux avc function) */ int piga_control(u32 ssid, ...., struct av_decision * avd) { /* * Here my hypercall work but block my vm with this error : * " BUG: scheduling while atomic ... " */ spin_lock_bh(&xgr_learn_lock); if ( in_atomic()) kvm_hypercall2 ( 6, (unsigned long)2 ,(unsigned long)piga_seq_cpt); spin_unlock_bh(&xgr_learn_lock); if (piga_on == 1) { /* * Here my hypercall make a kernel panic with this error: * " divide error: 0000 [#1] SMP" */ spin_lock_bh(&xgr_learn_lock); set_current_state(TASK_UNINTERRUPTIBLE); kvm_hypercall2 ( 6, (unsigned long)2 ,(unsigned long)piga_seq_cpt); set_current_state(TASK_RUNNING); spin_lock_bh(&xgr_learn_lock); } }
Date: Wed, 8 Jun 2011 15:52:33 +0530 Subject: Re: Problems with hypercalls From: fs.rajat@gmail.com To: mulyadi.santosa@gmail.com CC: tricheurs@hotmail.fr; kernelnewbies@kernelnewbies.org
are you doing 64bit devision on 32 bit arch? If that is the case, do_div is worth considering.
On Wed, Jun 8, 2011 at 3:25 PM, Mulyadi Santosa <mulyadi.santosa@gmail.com> wrote:
On Tue, Jun 7, 2011 at 15:39, emilie lefebvre <tricheurs@hotmail.fr> wrote:
"divide error: 0000 [#1] SMP ... [<ffffffff813f8cdd>] panic+0x78/0x137 [<ffffffff813fcb94>] oops_end+0xe4/0x100 [<ffffffff8101021b>] die+0x5b/0x90 [<ffffffff813fc444>] do_trap+0xc4/0x160 [<ffffffff8100df2f>] do_divide_error+0x8f/0xb0 [<ffffffff811f974c>] ? my_function+0xdc/0xe70 "
Could you have any suggestions ?
Could you show us your code? perhaps by pasting them somewhere?
From what I guess, sounds like your code did some math (directly or indirectly) that fiddle with floating point numbers?
-- regards,
Mulyadi Santosa Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
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