panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff828a7884) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff829306d1,ffffffff82895a19,90,ffffffff8287b6ad) at __assert+0x29 sys/kern/subr_prf.c:157
uvm_pagealloc_pg(fffffd8007674560,fffffd8065cd8340,0,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline]
uvm_pagealloc_pg(fffffd8007674560,fffffd8065cd8340,0,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:709
uvm_pagealloc(fffffd8065cd8340,0,0,3) at uvm_pagealloc+0x1ec sys/uvm/uvm_page.c:917
pmap_get_ptp(fffffd8065cd82f0,20000000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215
pmap_enter(fffffd8065cd82f0,20000000,62d66000,3,21) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2722
uvm_fault_upper(ffff8000373c6550,ffff8000373c6588,ffff8000373c6450,0) at uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1056
uvm_fault(fffffd8073cb2a80,20000000,0,1) at uvm_fault+0x154 sys/uvm/uvm_fault.c:608
kpageflttrap(ffff8000373c66f0,20000000) at kpageflttrap+0x252 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff8000373c66f0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyinstr() at _copyinstr+0x58
namei(ffff8000373c6aa8) at namei+0x133 sys/kern/vfs_lookup.c:156
vn_open(ffff8000373c6aa8,41,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140
doopenat(ffff80002a218000,ffffff9c,20000000,40,0,ffff8000373c6c50) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff8000373c6d00) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline]
syscall(ffff8000373c6d00) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xcc70e150210, count: 240
End of stack trace.