panic: 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(ffff800000b3d048,19,6000,1) at disk_openpart+0x20d
vndopen(e19,9,6000,ffff80003c9fc7f8) at vndopen+0x222 sys/dev/vnd.c:203
VOP_OPEN(fffffd806d807e70,9,fffffd8007bfd958,ffff80003c9fc7f8) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138
vn_open(ffff80003a537ca0,9,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff80003c9fc7f8,ffffff9c,200000000200,8,0,ffff80003a537e40) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138
syscall(ffff80003a537ef0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003a537ef0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x90502e5f9b0, count: 248
End of stack trace.