panic: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/subr_disk.c", line 1169
Starting stack trace...
panic(ffffffff833a3608) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833de253,ffffffff833bee08,491,ffffffff833d2418) at __assert+0x29 sys/kern/subr_prf.c:-1
disk_openpart(ffff800000b28608,1f,6000,0) at disk_openpart+0x20d
vndopen(e5f,81,6000,ffff8000fffe1a20) at vndopen+0x222 sys/dev/vnd.c:203
VOP_OPEN(fffffd800f7b6710,81,fffffd80097fd4e0,ffff8000fffe1a20) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff80003c4b2e10,81,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff8000fffe1a20,ffffff9c,2000000000c0,80,0,ffff80003c4b2fc0) at doopenat+0x35b sys/kern/vfs_syscalls.c:1138
syscall(ffff80003c4b3070) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4b3070) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd42df17d3c0, count: 248
End of stack trace.