BUG: scheduling while atomic

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Here is the following logs i got when i collected ramdump from my development mobile after going to kernel panic
Kernel version is 2.6.35.7, Android version GingerBread.
 
BUG: scheduling while atomic: pppd/675/0x00000203
<4>[   85.745849] Modules linked in: dhd hotspot_event_monitoring bthid cmc7xx_sdio
<4>[   85.746032] [<c003f7dc>] (unwind_backtrace+0x0/0x168) from [<c05aa808>] (dump_stack+0x18/0x1c)
<4>[   85.746154] [<c05aa808>] (dump_stack+0x18/0x1c) from [<c00d86a4>] (__schedule_bug+0x54/0x68)
<4>[   85.746246] [<c00d86a4>] (__schedule_bug+0x54/0x68) from [<c05aab3c>] (schedule+0x78/0x48c)
<4>[   85.746337] [<c05aab3c>] (schedule+0x78/0x48c) from [<c05ab604>] (schedule_timeout+0x24/0x23c)
<4>[   85.746429] [<c05ab604>] (schedule_timeout+0x24/0x23c) from [<c05aced0>] (__down+0x88/0xc4)
<4>[   85.746520] [<c05aced0>] (__down+0x88/0xc4) from [<c00fd654>] (down+0x44/0x84)
<4>[   85.746643] [<c00fd654>] (down+0x44/0x84) from [<c0440bac>] (dpram_write+0x64/0x884)
<4>[   85.746734] [<c0440bac>] (dpram_write+0x64/0x884) from [<c04414f0>] (vs_write+0x104/0x154)
<4>[   85.746826] [<c04414f0>] (vs_write+0x104/0x154) from [<c034328c>] (ppp_async_push+0x110/0x584)
<4>[   85.746917] [<c034328c>] (ppp_async_push+0x110/0x584) from [<c0343750>] (ppp_async_send+0x50/0x58)
<4>[   85.747009] [<c0343750>] (ppp_async_send+0x50/0x58) from [<c0341360>] (ppp_channel_push+0x60/0x100)
<4>[   85.747100] [<c0341360>] (ppp_channel_push+0x60/0x100) from [<c0341500>] (ppp_write+0x100/0x108)
<4>[   85.747192] [<c0341500>] (ppp_write+0x100/0x108) from [<c015a428>] (vfs_write+0xb8/0x164)
<4>[   85.747283] [<c015a428>] (vfs_write+0xb8/0x164) from [<c015a598>] (sys_write+0x44/0x70)
<4>[   85.747375] [<c015a598>] (sys_write+0x44/0x70) from [<c00390c0>] (ret_fast_syscall+0x0/0x30)
<1>[   85.747436] Unable to handle kernel NULL pointer dereference at virtual address 00000000
<1>[   85.747497] pgd = db338000
<1>[   85.747528] [00000000] *pgd=4a7d9031, *pte=00000000, *ppte=00000000
<0>[   85.747619]I[           pppd: 675] Internal error: Oops: 817 [#1] PREEMPT
<0>[   85.747650]I[           pppd: 675] last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state
<4>[   85.747711]I[           pppd: 675] Modules linked in: dhd hotspot_event_monitoring bthid cmc7xx_sdio
<4>[   85.747833]I[           pppd: 675] CPU: 0    Tainted: G        W    (2.6.35.7-perf #2)
<4>[   85.747894]I[           pppd: 675] PC is at __schedule_bug+0x58/0x68
<4>[   85.747955]I[           pppd: 675] LR is at unwind_frame+0xe8/0x628
<4>[   85.748016]I[           pppd: 675] pc : [<c00d86a8>]    lr : [<c003f29c>]    psr: a0000013
<4>[   85.748077]I[           pppd: 675] sp : dab59d00  ip : dab59c28  fp : dab59d14
<4>[   85.748138]I[           pppd: 675] r10: c08546b0  r9 : 0000007d  r8 : 00000428
<4>[   85.748199]I[           pppd: 675] r7 : dcbca8c0  r6 : dab58000  r5 : c080c748  r4 : 00000000
<4>[   85.748260]I[           pppd: 675] r3 : 00000000  r2 : dab59fa8  r1 : 00000001  r0 : c00390c0
<4>[   85.748321]I[           pppd: 675] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
<4>[   85.748382]I[           pppd: 675] Control: 10c57c7d  Table: 4b338059  DAC: 00000015
[<c00d86a8>] (__schedule_bug+0x58/0x68) from [<c05aab3c>] (schedule+0x78/0x48c)
<4>[   85.762084]I[           pppd: 675] [<c05aab3c>] (schedule+0x78/0x48c) from [<c05ab604>] (schedule_timeout+0x24/0x23c)
<4>[   85.762176]I[           pppd: 675] [<c05ab604>] (schedule_timeout+0x24/0x23c) from [<c05aced0>] (__down+0x88/0xc4)
<4>[   85.762268]I[           pppd: 675] [<c05aced0>] (__down+0x88/0xc4) from [<c00fd654>] (down+0x44/0x84)
<4>[   85.762390]I[           pppd: 675] [<c00fd654>] (down+0x44/0x84) from [<c0440bac>] (dpram_write+0x64/0x884)
<4>[   85.762481]I[           pppd: 675] [<c0440bac>] (dpram_write+0x64/0x884) from [<c04414f0>] (vs_write+0x104/0x154)
<4>[   85.762603]I[           pppd: 675] [<c04414f0>] (vs_write+0x104/0x154) from [<c034328c>] (ppp_async_push+0x110/0x584)
<4>[   85.762695]I[           pppd: 675] [<c034328c>] (ppp_async_push+0x110/0x584) from [<c0343750>] (ppp_async_send+0x50/0x58)
<4>[   85.762786]I[           pppd: 675] [<c0343750>] (ppp_async_send+0x50/0x58) from [<c0341360>] (ppp_channel_push+0x60/0x100)
<4>[   85.762908]I[           pppd: 675] [<c0341360>] (ppp_channel_push+0x60/0x100) from [<c0341500>] (ppp_write+0x100/0x108)
<4>[   85.763000]I[           pppd: 675] [<c0341500>] (ppp_write+0x100/0x108) from [<c015a428>] (vfs_write+0xb8/0x164)
<4>[   85.763092]I[           pppd: 675] [<c015a428>] (vfs_write+0xb8/0x164) from [<c015a598>] (sys_write+0x44/0x70)
<4>[   85.763214]I[           pppd: 675] [<c015a598>] (sys_write+0x44/0x70) from [<c00390c0>] (ret_fast_syscall+0x0/0x30)
<0>[   85.763305]I[           pppd: 675] Code: ebfd894a ea000000 eb134852 e3a03000 (e5833000)
<4>[   85.763458]I[           pppd: 675] ---[ end trace 1b75b31a2719ed20 ]---
<0>[   85.763519]I[           pppd: 675] Kernel panic - not syncing: Fatal exception in interrupt
<4>[   85.763641]I[           pppd: 675] [<c003f7dc>] (unwind_backtrace+0x0/0x168) from [<c05aa808>] (dump_stack+0x18/0x1c)
<4>[   85.763732]I[           pppd: 675] [<c05aa808>] (dump_stack+0x18/0x1c) from [<c05aa884>] (panic+0x78/0x16c)
<4>[   85.763824]I[           pppd: 675] [<c05aa884>] (panic+0x78/0x16c) from [<c003d5bc>] (die+0x248/0x288)
<4>[   85.763946]I[           pppd: 675] [<c003d5bc>] (die+0x248/0x288) from [<c00437b8>] (__do_kernel_fault+0x6c/0x8c)
<4>[   85.764038]I[           pppd: 675] [<c00437b8>] (__do_kernel_fault+0x6c/0x8c) from [<c0043a70>] (do_page_fault+0x298/0x2b8)
<4>[   85.764160]I[           pppd: 675] [<c0043a70>] (do_page_fault+0x298/0x2b8) from [<c0038408>] (do_DataAbort+0x3c/0xa0)
<4>[   85.764251]I[           pppd: 675] [<c0038408>] (do_DataAbort+0x3c/0xa0) from [<c0038bec>] (__dabt_svc+0x4c/0x60)
<4>[   85.764312]I[           pppd: 675] Exception stack(0xdab59cb8 to 0xdab59d00)
<4>[   85.764373]I[           pppd: 675] 9ca0:                                                       c00390c0 00000001
<4>[   85.764465]I[           pppd: 675] 9cc0: dab59fa8 00000000 00000000 c080c748 dab58000 dcbca8c0 00000428 0000007d
<4>[   85.764587]I[           pppd: 675] 9ce0: c08546b0 dab59d14 dab59c28 dab59d00 c003f29c c00d86a8 a0000013 ffffffff
<4>[   85.764678]I[           pppd: 675] [<c0038bec>] (__dabt_svc+0x4c/0x60) from [<c00d86a8>] (__schedule_bug+0x58/0x68)
<4>[   85.764801]I[           pppd: 675] [<c00d86a8>] (__schedule_bug+0x58/0x68) from [<c05aab3c>] (schedule+0x78/0x48c)
<4>[   85.764892]I[           pppd: 675] [<c05aab3c>] (schedule+0x78/0x48c) from [<c05ab604>] (schedule_timeout+0x24/0x23c)
<4>[   85.765014]I[           pppd: 675] [<c05ab604>] (schedule_timeout+0x24/0x23c) from [<c05aced0>] (__down+0x88/0xc4)
<4>[   85.765106]I[           pppd: 675] [<c05aced0>] (__down+0x88/0xc4) from [<c00fd654>] (down+0x44/0x84)
<4>[   85.765197]I[           pppd: 675] [<c00fd654>] (down+0x44/0x84) from [<c0440bac>] (dpram_write+0x64/0x884)
<4>[   85.765319]I[           pppd: 675] [<c0440bac>] (dpram_write+0x64/0x884) from [<c04414f0>] (vs_write+0x104/0x154)
<4>[   85.765411]I[           pppd: 675] [<c04414f0>] (vs_write+0x104/0x154) from [<c034328c>] (ppp_async_push+0x110/0x584)
<4>[   85.765502]I[           pppd: 675] [<c034328c>] (ppp_async_push+0x110/0x584) from [<c0343750>] (ppp_async_send+0x50/0x58)
<4>[   85.765624]I[           pppd: 675] [<c0343750>] (ppp_async_send+0x50/0x58) from [<c0341360>] (ppp_channel_push+0x60/0x100)
<4>[   85.765716]I[           pppd: 675] [<c0341360>] (ppp_channel_push+0x60/0x100) from [<c0341500>] (ppp_write+0x100/0x108)
<4>[   85.765838]I[           pppd: 675] [<c0341500>] (ppp_write+0x100/0x108) from [<c015a428>] (vfs_write+0xb8/0x164)
<4>[   85.765930]I[           pppd: 675] [<c015a428>] (vfs_write+0xb8/0x164) from [<c015a598>] (sys_write+0x44/0x70)
<4>[   85.766021]I[           pppd: 675] [<c015a598>] (sys_write+0x44/0x70) from [<c00390c0>] (ret_fast_syscall+0x0/0x30)
<0>[   86.776214]I[           pppd: 675] (kernel_sec_save_final_context) Final context was saved before the system reset.
<0>[   86.776306]I[           pppd: 675] (kernel_sec_set_upload_cause) : upload_cause set c8
<0>[   86.776367]I[           pppd: 675] (kernel_sec_reset) BUILD_INFO: HWREV: b Date:May  2 2011 Time:22:27:11
<0>[   86.776428]I[           pppd: 675] (kernel_sec_reset) Kernel panic. The system will be reset !!
 
In the logs which error message is causing this kernel panic.
BUG: scheduling while atomic: pppd/675/0x00000203
                                           or
Unable to handle kernel NULL pointer dereference at virtual address 00000000
                                           or
Kernel panic - not syncing: Fatal exception in interrupt
Please help me here...
 
Thanks in advance..

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