[ 108.1375410] panic: LOCKDEBUG: Reader / writer lock error: mi_userret,62: sleep lock held
[ 108.1462293] cpu0: Begin traceback...
[ 108.1633723] vpanic() at netbsd:vpanic+0x27a sys/kern/subr_prf.c:288
[ 108.2133690] panic() at netbsd:panic+0x9d sys/kern/subr_prf.c:1084
[ 108.2833679] lockdebug_abort1() at netbsd:lockdebug_abort1+0x149 sys/kern/subr_lockdebug.c:388
[ 108.3333672] lockdebug_barrier() at netbsd:lockdebug_barrier+0x114 sys/kern/subr_lockdebug.c:657
[ 108.3733670] mi_userret() at netbsd:mi_userret+0x195 sys/sys/userret.h:63
[ 108.4233705] syscall() at netbsd:syscall+0x41d sys/arch/x86/x86/syscall.c:92
[ 108.4333697] --- syscall (number 75 via SYS_syscall) ---
[ 108.4533681] netbsd:syscall+0x41d:
[ 108.4533681] cpu0: End traceback...
[ 108.4533681] fatal breakpoint trap in supervisor mode
[ 108.4635305] trap type 1 code 0 rip 0xffffffff8023240d cs 0x8 rflags 0x286 cr2 0x20000080 ilevel 0 rsp 0xffffd58255807c30
[ 108.4761004] curlwp 0xffffd58013394600 pid 2510.1100 lowest kstack 0xffffd582558002c0
Stopped in pid 2510.1100 (syz-executor.4) at    netbsd:breakpoint+0x5:  leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0x105 sys/ddb/db_panic.c:71
vpanic() at netbsd:vpanic+0x27a sys/kern/subr_prf.c:288
panic() at netbsd:panic+0x9d sys/kern/subr_prf.c:1084
lockdebug_abort1() at netbsd:lockdebug_abort1+0x149 sys/kern/subr_lockdebug.c:388
lockdebug_barrier() at netbsd:lockdebug_barrier+0x114 sys/kern/subr_lockdebug.c:657
mi_userret() at netbsd:mi_userret+0x195 sys/sys/userret.h:63
syscall() at netbsd:syscall+0x41d sys/arch/x86/x86/syscall.c:92
--- syscall (number 75 via SYS_syscall) ---
ne