panic: vput: ref cnt Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *333214 65366 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 vput(fffffd802cb62630) at vput+0x14b sys/kern/vfs_subr.c:750 vn_close(fffffd802cb62630,2,fffffd803f7c68a0,ffff8000ffff2018) at vn_close+0xfb sys/kern/vfs_vnops.c:291 sys_acct(ffff8000ffff2018,ffff8000165ee4d8,ffff8000165ee540) at sys_acct+0x15b sys/kern/kern_acct.c:134 syscall(ffff8000165ee5a0) at syscall+0x508 Xsyscall(6,0,fffffffffffffec0,0,1,9018d79b010) at Xsyscall+0x128 end of kernel end trace frame: 0x903b9dc31b0, count: 8 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.