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Do not dereference NULL pointer.

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Reported by:	Peter Holm
Reviewed by:	alc
Approved by:	re (kensmith)
This commit is contained in:
Konstantin Belousov 2007-10-08 20:09:53 +00:00
parent 1649bbbb94
commit 4ab8ab9285
1 changed files with 2 additions and 3 deletions
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5
sys/vm/vm_fault.c
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@ -431,14 +431,13 @@ RetryFault:;
if (!vm_page_count_severe()) { if (!vm_page_count_severe()) {
fs.m = vm_page_alloc(fs.object, fs.pindex, fs.m = vm_page_alloc(fs.object, fs.pindex,
(fs.vp || fs.object->backing_object)? VM_ALLOC_NORMAL: VM_ALLOC_ZERO); (fs.vp || fs.object->backing_object)? VM_ALLOC_NORMAL: VM_ALLOC_ZERO);
if ((fs.m->valid & VM_PAGE_BITS_ALL) == VM_PAGE_BITS_ALL)
break;
} }
if (fs.m == NULL) { if (fs.m == NULL) {
unlock_and_deallocate(&fs); unlock_and_deallocate(&fs);
VM_WAITPFAULT; VM_WAITPFAULT;
goto RetryFault; goto RetryFault;
} } else if ((fs.m->valid & VM_PAGE_BITS_ALL) == VM_PAGE_BITS_ALL)
break;
} }
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