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<p class=MsoNormal>This patch comes to fix a BS in IBBUS that was caused due to
access to uninitialized field.<o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'>It happens when allocation of PD
object failed as a result the driver called to destroying PD function. This
function access to field in object that was not initialized. <o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'>Since the function doesn't use
these variables, I removed the code from the function.<o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'>Following is BS stack:<o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.5pt;
font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>0: kd> kb<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>RetAddr
: Args to
Child
: Call Site<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`01773682 :
00000000`c0000005 fffffa80`09bf3b60 00000000`00000065 fffff800`016bab14 :
nt!DbgBreakPointWithStatus<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0177446e :
fffff880`00000003 00000000`00000000 fffff800`016b76e0 00000000`0000003b :
nt!KiBugCheckDebugBreak+0x12<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0167c704 :
00000000`00000000 fffffa80`09bf3b60 fffff880`0802b510 00000000`00000000 :
nt!KeBugCheck2+0x71e<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0167bb69 :
00000000`0000003b 00000000`c0000005 fffff880`01c0af17 fffff880`0802bd10 :
nt!KeBugCheckEx+0x104<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0167b4bc :
fffff880`0802c4a8 fffff880`0802bd10 00000000`00000000 fffff800`016aab50 :
nt!KiBugCheckDispatch+0x69<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`016a22ed :
fffff800`018a0338 fffff800`017c747c fffff800`0160c000 fffff880`0802c4a8 :
nt!KiSystemServiceHandler+0x7c<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`016a9950 :
fffff800`017cc1b0 fffff880`0802b648 fffff880`0802c4a8 fffff800`0160c000 :
nt!RtlpExecuteHandlerForException+0xd<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`016b68df :
fffff880`0802c4a8 fffff880`0802bd10 fffff880`00000000 fffffa80`0a2b81f0 :
nt!RtlDispatchException+0x410<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0167bc42 :
fffff880`0802c4a8 fffffa80`0a523f20 fffff880`0802c550 fffffa80`0a523f20 :
nt!KiDispatchException+0x16f<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`0167a7ba :
00000000`00000000 fffffa80`0a523f20 fffffa80`0a7c4800 fffff800`016c79dc : nt!KiExceptionDispatch+0xc2<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c0af17 :
fffffa80`dbc8c000 00000000`00000040 fffff880`01cca26d 00000000`00000040 :
nt!KiPageFault+0x23a<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c6b29b :
00000000`00000000 fffff880`01cca250 fffffa80`00000287 fffffa80`dbc8c000 :
ibbus!destroying_pd+0x67 [s:\builds\6896\trunk\core\al\al_pd.c @ 198]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c6a6a5 :
fffffa80`dbc8c000 00000000`00000000 00000000`00000000 fffffa80`00000000 :
ibbus!destroy_obj+0x45b [s:\builds\6896\trunk\core\al\al_common.c @ 665]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c0a80e :
fffffa80`dbc8c000 00000000`00000000 00000000`00000001 fffff880`01c0aeb0 :
ibbus!async_destroy_obj+0xd5 [s:\builds\6896\trunk\core\al\al_common.c @ 536]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c7cd63 :
fffffa80`099ed000 fffff880`00000000 00000000`7637ce80 fffff880`0802c890 :
ibbus!alloc_pd+0x35e [s:\builds\6896\trunk\core\al\al_pd.c @ 121]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c86379 :
fffffa80`08a057d0 fffffa80`0a2b81f0 fffff880`0802c988 00000000`00000369 :
ibbus!proxy_alloc_pd+0x243
[s:\builds\6896\trunk\core\al\kernel\al_proxy_verbs.c @ 876]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01c0379d :
fffffa80`0a2b81f0 fffff880`0802c988 fffff6fc`400186e8 fffff880`030dd000 :
ibbus!verbs_ioctl+0x239 [s:\builds\6896\trunk\core\al\kernel\al_proxy_verbs.c @
3785]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff880`01bade40 :
fffffa80`0a2b81f0 fffffa80`0a523f20 fffff880`0802cca0 fffffa80`0a523f20 :
ibbus!al_dev_ioctl+0x2fd [s:\builds\6896\trunk\core\al\kernel\al_dev.c @ 461]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`019986b7 :
fffffa80`0a7c4860 fffffa80`0a2b81f0 fffffa80`0a2b8308 fffffa80`0a2b81f0 :
ibbus!bus_drv_ioctl+0x210 [s:\builds\6896\trunk\core\bus\kernel\bus_driver.c @
884]<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>fffff800`01998f16 :
00000000`0026f650 00000000`00000000 00000000`00000000 00000000`00000000 :
nt!IopXxxControlFile+0x607<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Index: al_pd.c<o:p></o:p></p>
<p class=MsoNormal>===================================================================<o:p></o:p></p>
<p class=MsoNormal>--- al_pd.c (revision 6902)<o:p></o:p></p>
<p class=MsoNormal>+++ al_pd.c (working copy)<o:p></o:p></p>
<p class=MsoNormal>@@ -182,8 +182,6 @@<o:p></o:p></p>
<p class=MsoNormal> destroying_pd(<o:p></o:p></p>
<p class=MsoNormal> IN al_obj_t *p_obj
)<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>- ib_al_handle_t h_al;<o:p></o:p></p>
<p class=MsoNormal>- ib_ca_handle_t h_ca;<o:p></o:p></p>
<p class=MsoNormal> ib_pd_handle_t h_pd;<o:p></o:p></p>
<p class=MsoNormal> ib_mw_handle_t h_mw;<o:p></o:p></p>
<p class=MsoNormal> cl_list_item_t *p_list_item;<o:p></o:p></p>
<p class=MsoNormal>@@ -191,13 +189,8 @@<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> CL_ASSERT( p_obj );<o:p></o:p></p>
<p class=MsoNormal> h_pd = PARENT_STRUCT( p_obj, ib_pd_t, obj );<o:p></o:p></p>
<p class=MsoNormal>+ CL_ASSERT( h_pd );<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>- /* Get the AL instance of this protection
domain. */<o:p></o:p></p>
<p class=MsoNormal>- p_obj = h_pd->obj.p_parent_obj;<o:p></o:p></p>
<p class=MsoNormal>- h_ca = PARENT_STRUCT( p_obj, ib_ca_t, obj );<o:p></o:p></p>
<p class=MsoNormal>- p_obj = h_ca->obj.p_parent_obj;<o:p></o:p></p>
<p class=MsoNormal>- h_al = PARENT_STRUCT( p_obj, ib_al_t, obj );<o:p></o:p></p>
<p class=MsoNormal>-<o:p></o:p></p>
<p class=MsoNormal> /*<o:p></o:p></p>
<p class=MsoNormal> * Deallocate all MW's before proceeding
with destruction. This ensures<o:p></o:p></p>
<p class=MsoNormal> * that all MW's have been destroyed before
any MR's are.<o:p></o:p></p>
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