panic: kernel diagnostic assert ion "ps->ps_uvncount == 0" fail ed: file "/syzkaller/managers/m ain/kernel/sys/kern/kern_unveil .c", line 188 Starting stack trace... panic(ffffffff830b7b0d) at panic+0x1ba sys/kern/subr_prf.c:229 __assert(ffffffff8306b914,ffffffff8303cc5a,bc,ffffffff82fefbd5) at __assert+0x29 unveil_destroy(ffff8000327f66a0) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4b0298,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4b0298,ffff8000376d9620,ffff8000376d9570) at sys_exit+0x1a syscall(ffff8000376d9620) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7004af2a9ee0, count: 250 End of stack trace.