[   1.6179679] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/dev/raidframe/rf_netbsdkintf.c:521:7, member access within null pointer of type 'struct raid_softc'

[   1.6373045] cpu0: Begin traceback...
[   1.6410338] vpanic() at netbsd:vpanic+0x258 sys/kern/subr_prf.c:336
[   1.6577279] isAlreadyReported() at netbsd:isAlreadyReported
[   1.6677404] HandleTypeMismatch() at netbsd:HandleTypeMismatch
[   1.6877784] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:396
[   1.6977935] rf_buildroothack() at netbsd:rf_buildroothack+0x4c3 sys/dev/raidframe/rf_netbsdkintf.c:526
[   1.7178287] rf_autoconfig() at netbsd:rf_autoconfig+0x75 rf_autoconfig sys/dev/raidframe/rf_netbsdkintf.c:432 [inline]
[   1.7178287] rf_autoconfig() at netbsd:rf_autoconfig+0x75 sys/dev/raidframe/rf_netbsdkintf.c:400
[   1.7278422] config_finalize() at netbsd:config_finalize+0x13d sys/kern/subr_autoconf.c:2148
[   1.7390854] main() at netbsd:main+0x594 sys/kern/init_main.c:647
[   1.7493335] cpu0: End traceback...
[   1.7493335] fatal breakpoint trap in supervisor mode
[   1.7593370] trap type 1 code 0 rip 0xffffffff8021dddd cs 0x8 rflags 0x282 cr2 0 ilevel 0 rsp 0xffffffff85e1d7d0
[   1.7714437] curlwp 0xffffffff84bb5ce0 pid 0.1 lowest kstack 0xffffffff85e192c0
Stopped in pid 0.1 (system) at  netbsd:breakpoint+0x5:  leave
db{0}>