panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff827aa36a) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff8282c025,ffffffff8279e1cf,90,ffffffff82785533) at __assert+0x29 sys/kern/subr_prf.c:157
uvm_pagealloc_pg(fffffd8006b92fa0,fffffd807b805ee0,0,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline]
uvm_pagealloc_pg(fffffd8006b92fa0,fffffd807b805ee0,0,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:709
uvm_pagealloc(fffffd807b805ee0,0,0,3) at uvm_pagealloc+0x1ec sys/uvm/uvm_page.c:917
pmap_get_ptp(fffffd807b805e90,20000000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209
pmap_enter(fffffd807b805e90,20000000,5d2cf000,3,21) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716
uvm_fault_upper(ffff80002a0cd130,ffff80002a0cd168,ffff80002a0cd030,0) at uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1056
uvm_fault(fffffd807aef2930,20000000,0,1) at uvm_fault+0x154 sys/uvm/uvm_fault.c:608
kpageflttrap(ffff80002a0cd2d0,20000500) at kpageflttrap+0x252 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002a0cd2d0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyinstr() at _copyinstr+0x58
namei(ffff80002a0cd688) at namei+0x133 sys/kern/vfs_lookup.c:156
vn_open(ffff80002a0cd688,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140
doopenat(ffff800021209558,ffffff9c,20000500,0,0,ffff80002a0cd860) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff80002a0cd8e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002a0cd8e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6134ba9dfa0, count: 240
End of stack trace.