syzbot

#!�ww�*a3�%E�� �eʎeXpanic: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/main/kernel/sys/kern/subr_disk.c", line 1169
Starting stack trace...
panic(ffffffff8336f9a2) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833a991a,ffffffff83347771,491,ffffffff8339e6c4) at __assert+0x29 sys/kern/subr_prf.c:-1
disk_openpart(ffff800000025c48,21,2000,1) at disk_openpart+0x20d
sdopen(d21,1,2000,ffff800035d21a10) at sdopen+0x261 sys/scsi/sd.c:429

spec_open(ffff80002a82f418) at spec_open+0x2d6 sys/kern/spec_vnops.c:150
VOP_OPEN(fffffd806da6b2c8,1,fffffd8007bfd8f0,ffff800035d21a10) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138
vn_open(ffff80002a82f660,1,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff800035d21a10,ffffff9c,200000000080,0,0,ffff80002a82f800) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138
syscall(ffff80002a82f8b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a82f8b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x8f43069e160, count: 247
End of stack trace.
syncing disks...set $lines = 0
set $maxwidth = 0
show panic
trace
show registers
show proc
ps
show all locks
show malloc
show all pools
machine ddbcpu 0
trace
machine ddbcpu 1
trace