--- syscall (136, FreeBSD ELF64, mkdir), rip = 0x80083e71c, rsp = 0x7fffffffe6e8, rbp = 0x800a4e300 --- lock order reversal: 1st 0xffffff0044341270 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2091 2nd 0xffffff819ed59850 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_softdep.c:6193 3rd 0xffffff0044e68620 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2091 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2e witness_checkorder() at witness_checkorder+0x81e __lockmgr_args() at __lockmgr_args+0xd10 ffs_lock() at ffs_lock+0x8c VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x47 vget() at vget+0x7b vfs_hash_get() at vfs_hash_get+0xd5 ffs_vgetf() at ffs_vgetf+0x48 softdep_sync_metadata() at softdep_sync_metadata+0x456 ffs_syncvnode() at ffs_syncvnode+0x210 ffs_truncate() at ffs_truncate+0x4ab ufs_direnter() at ufs_direnter+0x6ae ufs_mkdir() at ufs_mkdir+0x623 VOP_MKDIR_APV() at VOP_MKDIR_APV+0x93 kern_mkdirat() at kern_mkdirat+0x270 syscall() at syscall+0x102 Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (136, FreeBSD ELF64, mkdir), rip = 0x80072b71c, rsp = 0x7fffffffe5c8, rbp = 0x7fffffffe9e1 ---