On 23.09.20 00:51, Mark Johnston wrote: > On Tue, Sep 22, 2020 at 01:13:29AM +0300, Konstantin Belousov wrote: >> On Mon, Sep 21, 2020 at 08:57:46PM +0200, Rainer Hurling wrote: >>> Fatal trap 12: page fault while in kernel mode >>> cpuid = 31; apic id = 1f >>> fault virtual address = 0x25407efa >> This address is very suspicious. >> >> I cannot claim it as the fact, but most likely cause for such garbage >> pointer value is mismatched ABI between kernel and module. In other >> words, the module was built against headers from different kernel. > > For some reason clang is not complaining about a missing declaration for > vm_pager_allocate(), despite -Wmissing-prototypes in the CFLAGS... > > This patch is required on top of a patched extract of the vbox sources: > > --- the-freebsd-kernel.h.orig 2020-09-22 18:49:26.499329000 -0400 > +++ the-freebsd-kernel.h 2020-09-22 18:49:55.317615000 -0400 > @@ -68,6 +68,7 @@ > #include <vm/vm_kern.h> > #include <vm/vm_param.h> /* KERN_SUCCESS ++ */ > #include <vm/vm_page.h> > +#include <vm/vm_pager.h> > #include <vm/vm_phys.h> /* vm_phys_alloc_* */ > #include <vm/vm_extern.h> /* kmem_alloc_attr */ > #include <vm/vm_pageout.h> /* vm_contig_grow_cache */ > --- memobj-r0drv-freebsd.c.orig 2020-09-22 18:49:25.010456000 -0400 > +++ memobj-r0drv-freebsd.c 2020-09-22 18:49:47.462276000 -0400 > @@ -323,7 +323,8 @@ > size_t cPages = atop(pMemFreeBSD->Core.cb); > int rc; > > - pMemFreeBSD->pObject = vm_object_allocate(OBJT_PHYS, cPages); > + pMemFreeBSD->pObject = vm_pager_allocate(OBJT_PHYS, NULL, > + pMemFreeBSD->Core.cb, VM_PROT_ALL, 0, curthread->td_ucred); > > /* No additional object reference for auto-deallocation upon unmapping. > */ > #if __FreeBSD_version >= 1000055 > @@ -457,7 +458,8 @@ > return VERR_NO_MEMORY; > } > > - pMemFreeBSD->pObject = vm_object_allocate(OBJT_PHYS, atop(cb)); > + pMemFreeBSD->pObject = vm_pager_allocate(OBJT_PHYS, NULL, > + pMemFreeBSD->Core.cb, VM_PROT_ALL, 0, curthread->td_ucred); > > if (PhysHighest != NIL_RTHCPHYS) > VmPhysAddrHigh = PhysHighest; >
I can confirm that these patches (two files) work for me. The system reboots with loaded vbox kernel modules. Many thanks for your help and investigations! Best regards, Rainer _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
