panic: Assertion lock == sq->sq_lock failed at /syzkaller/managers/main/kernel/sys/kern/subr_sleepqueue.c:360
cpuid = 0
time = 4197332
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002ae57600
vpanic() at vpanic+0x1e0/frame 0xfffffe002ae57660
panic() at panic+0x43/frame 0xfffffe002ae576c0
sleepq_add() at sleepq_add+0x48e/frame 0xfffffe002ae57720
_sleep() at _sleep+0x2ce/frame 0xfffffe002ae577d0
kern_sigtimedwait() at kern_sigtimedwait+0x4ae/frame 0xfffffe002ae578d0
sys_sigwaitinfo() at sys_sigwaitinfo+0x5c/frame 0xfffffe002ae57980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe002ae57ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002ae57ab0
--- syscall (346, FreeBSD ELF64, sys_sigwaitinfo), rip = 0x20000249, rsp = 0x7fffdfed4eb8, rbp = 0xa ---
KDB: enter: panic
[ thread pid 65815 tid 101950 ]
Stopped at kdb_enter+0x6a: movq $0,kdb_why