[ 13.696665] WARNING: at /build/buildd/linux-3.4.0/kernel/trace/ftrace.c:1583 ftrace_bug+0x28f/0x2e0() [ 13.696668] Hardware name: Inspiron N4010 [ 13.696670] Modules linked in: snd_timer(+) videobuf2_memops snd_seq_device mac80211 snd psmouse coretemp soundcore rfcomm snd_page_alloc intel_ips serio_raw dell_wmi dell_laptop cfg80211 parport_pc microcode bluetooth sparse_keymap mei(C) dcdbas ppdev mac_hid lp parport usbhid hid atl1c wmi i915 drm_kms_helper drm i2c_algo_bit video [ 13.696695] Pid: 853, comm: modprobe Tainted: G C 3.4.0-5-generic #11-Ubuntu [ 13.696697] Call Trace: [ 13.696707] [] warn_slowpath_common+0x7f/0xc0 [ 13.696722] [] ? __probe_kernel_read+0x46/0x70 [ 13.696728] [] ? snd_timer_pause+0x4/0x20 [snd_timer] [ 13.696733] [] ? snd_timer_pause+0x4/0x20 [snd_timer] [ 13.696736] [] warn_slowpath_null+0x1a/0x20 [ 13.696740] [] ftrace_bug+0x28f/0x2e0 [ 13.696743] [] ftrace_process_locs+0x384/0x540 [ 13.696747] [] ftrace_module_notify+0x47/0x50 [ 13.696754] [] notifier_call_chain+0x4d/0x70 [ 13.696758] [] __blocking_notifier_call_chain+0x58/0x80 [ 13.696762] [] blocking_notifier_call_chain+0x16/0x20 [ 13.696766] [] sys_init_module+0x75/0x230 [ 13.696770] [] system_call_fastpath+0x16/0x1b [ 13.696773] ---[ end trace 242cae57764ac95b ]--- [ 13.696775] ftrace failed to modify [] snd_timer_pause+0x4/0x20 [snd_timer] [ 13.696780] actual: 00:87:42:45:e1 [ 13.696826] BUG: unable to handle kernel paging request at ffffffffa02b6031 [ 13.696872] IP: [] snd_timer_global_new+0x1/0x40 [snd_timer] [ 13.696915] PGD 1c0d067 PUD 1c11063 PMD a2e32067 PTE a8e84161 [ 13.696952] Oops: 0003 [#1] SMP [ 13.696975] CPU 3 [ 13.696989] Modules linked in: snd_timer(+) videobuf2_memops snd_seq_device mac80211 snd psmouse coretemp soundcore rfcomm snd_page_alloc intel_ips serio_raw dell_wmi dell_laptop cfg80211 parport_pc microcode bluetooth sparse_keymap mei(C) dcdbas ppdev mac_hid lp parport usbhid hid atl1c wmi i915 drm_kms_helper drm i2c_algo_bit video [ 13.697192] [ 13.697200] Pid: 853, comm: modprobe Tainted: G WC 3.4.0-5-generic #11-Ubuntu Dell Inc. Inspiron N4010/021CN3 [ 13.697245] RIP: 0010:[] [] snd_timer_global_new+0x1/0x40 [snd_timer] [ 13.697287] RSP: 0018:ffff8800a352dee8 EFLAGS: 00010246 [ 13.697309] RAX: ffffffffa02b6031 RBX: ffffffffa021f080 RCX: 0000000000000000 [ 13.697337] RDX: ffff8800a352df00 RSI: 0000000000000000 RDI: ffffffffa021e3e6 [ 13.697367] RBP: ffff8800a352df18 R08: ffff8800b71966b0 R09: ffff8800b1a9ffc0 [ 13.697396] R10: ffff8800b71943f0 R11: 0000000000000000 R12: ffffffffa02b6000 [ 13.697424] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 13.697452] FS: 00007f40f2d97700(0000) GS:ffff8800b7180000(0000) knlGS:0000000000000000 [ 13.697484] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 13.697507] CR2: ffffffffa02b6031 CR3: 00000000a81cc000 CR4: 00000000000007e0 [ 13.697535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 13.697563] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 13.697591] Process modprobe (pid: 853, threadinfo ffff8800a352c000, task ffff8800b1cb44d0) [ 13.697624] Stack: [ 13.697633] ffff8800a352df18 ffffffff81043463 0000000000000000 0000000000000000 [ 13.697665] 000000140000001a ffffffffa021f080 ffff8800a352df48 ffffffff8100212a [ 13.697697] ffffffffa021f080 000000000000ba30 00000000008f20e0 0000000000000000 [ 13.697729] Call Trace: [ 13.697745] [] ? set_memory_nx+0x43/0x50 [ 13.697771] [] do_one_initcall+0x12a/0x180 [ 13.697794] [] sys_init_module+0xc2/0x230 [ 13.697818] [] system_call_fastpath+0x16/0x1b [ 13.697842] Code: 1f 00 40 00 00 00 00 00 00 00 04 00 00 00 00 74 e3 21 a0 00 00 00 01 00 1f 00 00 00 65 f4 43 e1 00 00 04 00 00 00 00 00 00 00 58 <00> 00 00 02 00 02 00 20 53 3f 45 e1 00 00 00 f2 01 00 00 00 00 [ 13.698007] RIP [] snd_timer_global_new+0x1/0x40 [snd_timer] [ 13.698039] RSP [ 13.698053] CR2: ffffffffa02b6031