panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff833aa896) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833e9671,ffffffff833dbfab,90,ffffffff83382f47) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagealloc_pg(fffffd8007e06050,fffffd800b062258,8000000,0) at uvm_pagealloc_pg+0x54b sys/uvm/uvm_page.c:707
uvm_pagealloc(fffffd800b062258,8000000,0,3) at uvm_pagealloc+0x252 sys/uvm/uvm_page.c:913
pmap_get_ptp(fffffd800b062200,2000000b1000) at pmap_get_ptp+0x1d0 sys/arch/amd64/amd64/pmap.c:-1
pmap_enter(fffffd800b062200,2000000b1000,f28a000,3,20) at pmap_enter+0x386 sys/arch/amd64/amd64/pmap.c:-1
uvm_fault_upper_lookup(ffff80003c513010,ffff80003c513048,ffff80003c512f10,ffff80003c512f90) at uvm_fault_upper_lookup+0x337 sys/uvm/uvm_fault.c:-1
uvm_fault(fffffd806cb26d70,2000000b4000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:638
kpageflttrap(ffff80003c5131c0,2000000b44c0) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003c5131c0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:510
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
ffs_write(ffff80003c513400) at ffs_write+0x769 sys/ufs/ffs/ffs_vnops.c:359
VOP_WRITE(fffffd805ffde520,ffff80003c5135b8,7,fffffd80097fd5b0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
vn_write(fffffd806cb3d7b0,ffff80003c5135b8,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80003c413788,5,ffff80003c5135b8,0,ffff80003c513670) at dofilewritev+0x242 sys/kern/sys_generic.c:380
sys_write(ffff80003c413788,ffff80003c513720,ffff80003c513670) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff80003c513720) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c513720) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2db0878dc60, count: 238
End of stack trace.