witness: lock order reversal: 1st 0xffff8000015ded98 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806e084b80 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff832f9abd -> 0xffffffff8334590b is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 soreceive+0x27d sys/kern/uipc_socket.c:870 #3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xa1 sys/dev/vnd.c:685 #7 vndioctl+0xdfb sys/dev/vnd.c:486 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #12 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806e084b80,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e084b68,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e084b68,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805e35d6d0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805e35d6d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805e35d6d0,fffffd805e35d0e8,0,0,200,0,fb2a56d3317ee5cf) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805e35d6d0,fffffd805e35d0e8,ffff80002a270018) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ec89a00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000015deca8,ffff8000333e8518,ffff8000333e84c8,0,ffff8000333e8500,ffff8000333e868c,741bcf4de59a7c42) at soreceive+0xc24 sys/kern/uipc_socket.c:1009 recvit(ffff80002a270018,4,ffff8000333e8660,0,ffff8000333e8710) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80002a270018,ffff8000333e87c0,ffff8000333e8710) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff8000333e87c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333e87c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7400b757e00, count: -14 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000333e7fb0 rbx 0 rdx 0 rcx 0xffff80002a270018 rax 0xffffffff837efff0 cpu_info_full_primary+0x1ff0 r8 0xffff8000333e7e90 r9 0x8080808080808080 r10 0xd2eac2ff9b69fb7 r11 0xae51311472e65009 r12 0xfffffd8003eff640 r13 0xfffffd80046e6d78 r14 0x3 r15 0xffffffff833e2b64 substchar+0xf1da rip 0xffffffff831577a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000333e7fa0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=234120 pid=34943 tcnt=3 stat=onproc flags process=1000000 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2707e0,0xffff80002a271250 process=0xffff8000fffece88 user=0xffff8000333e3000, vmspace=0xfffffd807e205018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51553 196202 69295 0 2 0 syz-executor 51553 264233 69295 0 3 0x4000080 msgwait syz-executor 51553 112562 69295 0 3 0x4000080 msgwait syz-executor 44601 402462 20187 0 2 0 syz-executor 44601 383986 20187 0 3 0x4000080 rest syz-executor 44601 55199 20187 0 2 0x4000000 syz-executor 34943 238849 43181 0 2 0x1000000 syz-executor *34943 234120 43181 0 7 0x5000000 syz-executor 34943 71970 43181 0 3 0x5000080 fsleep syz-executor 65569 153346 48570 60929 3 0x90 nanoslp syz-executor 65569 243463 48570 60929 3 0x4000090 kqread syz-executor 65569 149246 48570 60929 3 0x4000090 fsleep syz-executor 5342 508858 76378 0 3 0x80 nanoslp syz-executor 5342 488308 76378 0 3 0x4000080 sbwait syz-executor 5342 88423 76378 0 3 0x4000080 fsleep syz-executor 15657 19959 93920 0 3 0x80 nanoslp syz-executor 15657 276448 93920 0 3 0x4000080 kqread syz-executor 15657 291264 93920 0 3 0x4000080 kqread syz-executor 15657 108420 93920 0 3 0x4000080 fsleep syz-executor 33894 23493 1 0 3 0x100083 ttyin getty 54186 71711 0 0 3 0x14200 acct acct 6049 209758 0 0 3 0x14200 bored sosplice 78000 130796 46952 0 3 0x82 nanoslp syz-executor 48570 156128 46952 0 3 0x82 nanoslp syz-executor 43181 380663 46952 0 3 0x82 nanoslp syz-executor 76378 16649 46952 0 3 0x82 nanoslp syz-executor 93920 54616 46952 0 3 0x82 nanoslp syz-executor 20187 262799 46952 0 3 0x82 nanoslp syz-executor 95452 405017 46952 0 3 0x2 biowait syz-executor 69295 361633 46952 0 3 0x82 nanoslp syz-executor 46952 137834 68448 0 3 0x82 kqread syz-executor 68448 33329 71519 0 3 0x10008a sigsusp ksh 71519 121602 38993 0 3 0x98 kqread sshd-session 38993 15487 40147 0 3 0x92 kqread sshd-session 40147 241690 1 0 3 0x88 kqread sshd 46636 29208 59120 74 3 0x1100092 bpf pflogd 59120 477004 1 0 3 0x80 sbwait pflogd 43904 517492 58591 73 3 0x1100090 kqread syslogd 58591 353819 1 0 3 0x100082 sbwait syslogd 1844 145281 1 0 3 0x100080 kqread resolvd 91700 877 35014 77 3 0x100092 kqread dhcpleased 94516 272904 35014 77 3 0x100092 kqread dhcpleased 35014 169448 1 0 3 0x80 kqread dhcpleased 33097 111672 0 0 3 0x14200 bored smr 55011 157424 0 0 2 0x14200 zerothread 64543 467986 0 0 3 0x14200 aiodoned aiodoned 1763 289479 0 0 3 0x14200 syncer update 84192 233703 0 0 3 0x14200 cleaner cleaner 9472 133968 0 0 3 0x14200 reaper reaper 77774 99111 0 0 3 0x14200 pgdaemon pagedaemon 90592 30325 0 0 3 0x14200 bored viomb 26503 37589 0 0 3 0x40014200 acpi0 acpi0 28149 342885 0 0 7 0x40014200 idle1 15931 110071 0 0 3 0x14200 bored softnet1 97853 164346 0 0 3 0x14200 bored softnet0 22875 160174 0 0 3 0x14200 bored systqmp 1766 343659 0 0 3 0x14200 bored systq 49469 308502 0 0 3 0x14200 tmoslp softclockmp 38741 290428 0 0 3 0x40014200 tmoslp softclock 18572 120723 0 0 3 0x40014200 idle0 1 164453 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 34943 (syz-executor) thread 0xffff80002a270018 (234120) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83915fc0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_externalize+0x155 sys/kern/uipc_usrreq.c:-1 #2 soreceive+0xc24 sys/kern/uipc_socket.c:1009 #3 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff8000015ded98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:870 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #7 Xsyscall+0x128 Process 95452 (syz-executor) thread 0xffff80002a273768 (405017) exclusive rrwlock inode r = 0 (0xfffffd806e0846e0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ce0ad88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11021K 12508K 166960K 13567 0 pcb 17 16K 18K 166960K 681 0 rtable 178 8K 9K 166960K 494 0 pf 31 17K 21K 166960K 134 0 ifaddr 36 6K 8K 166960K 96 0 ifgroup 47 2K 3K 166960K 161 0 sysctl 4 1K 9K 166960K 16 0 counters 64 36K 37K 166960K 308 0 ioctlops 0 0K 4K 166960K 1722 0 iov 0 0K 24K 166960K 81 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1528 96K 97K 166960K 2555 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 620K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 51 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1234 0 sigio 0 0K 0K 166960K 24 0 proc 72 115K 196K 166960K 674 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 210 0 in_multi 79 5K 7K 166960K 146 0 ether_multi 1 0K 0K 166960K 17 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 556 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 170K 190K 166960K 12433 0 UVM aobj 138 6K 6K 166960K 141 0 pinsyscall 42 84K 102K 166960K 2307 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 10 0K 2K 166960K 64 0 temp 71 8654K 8719K 166960K 30437 0 kqueue 17 26K 33K 166960K 269 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 288 0 285 5 2 3 3 0 8 2 rtentry 176 130 0 58 5 0 5 5 0 8 0 unpcb 144 1187 0 1166 7 1 6 6 0 8 5 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpcb 736 500 0 496 14 12 2 7 0 8 1 arp 136 13 0 3 1 0 1 1 0 8 0 inpcb 328 1743 0 1734 20 15 5 10 0 8 3 nd6 152 22 0 6 1 0 1 1 0 8 0 pkpcb 40 15 0 15 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 105 0 105 2 1 1 1 0 8 1 pppxif 1504 42 0 42 2 1 1 1 0 8 1 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 0 1 0 1 1 0 8 0 pffrent 40 18 0 10 1 0 1 1 0 8 0 pfosfp 40 1434 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1434 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 78 0 21 1 0 1 1 0 8 0 pfstkey 128 78 0 21 2 0 2 2 0 8 0 pfstate 384 78 0 21 6 0 6 6 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 598 0 251 31 2 29 30 0 8 4 art_table 40 600 0 251 5 0 5 5 0 8 0 art_node 32 126 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 2 1 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 47 0 37 1 0 1 1 0 8 0 shmpl 112 138 0 3 4 0 4 4 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3632 0 2132 96 1 95 96 0 8 0 ffsino 296 3632 0 2132 118 1 117 118 0 8 0 nchpl 144 5365 0 3672 64 0 64 64 0 8 0 rtmask 32 7 0 7 3 3 0 1 0 8 0 uvmvnodes 80 4493 0 0 92 0 92 92 0 8 0 vnodes 216 4493 0 0 250 0 250 250 0 8 0 namei 1024 22490 0 22490 3 2 1 2 0 8 1 percpumem 16 169 0 122 1 0 1 1 0 8 0 kstatmem 264 92 0 70 3 0 3 3 0 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 30798 0 30797 12 10 2 8 1 8 1 plimitpl 152 411 0 393 1 0 1 1 0 8 0 sigapl 424 1524 0 1475 9 2 7 8 0 8 0 knotepl 120 583 0 0 17 0 17 17 0 8 0 kqueuepl 224 861 0 849 12 7 5 7 0 8 3 pipepl 344 325 0 298 6 1 5 6 0 8 2 fdescpl 528 1485 0 1454 3 0 3 3 0 8 0 filepl 160 11905 0 11685 25 8 17 17 0 8 6 lockfpl 104 547 0 545 2 1 1 2 0 8 0 lockfspl 48 256 0 254 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 111 0 94 1 0 1 1 0 8 0 ucredpl 104 1810 0 1795 1 0 1 1 0 8 0 zombiepl 144 1476 0 1475 2 1 1 1 0 8 0 processpl 1232 1524 0 1475 7 3 4 6 0 8 0 procpl 664 3271 0 3209 8 2 6 8 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 752 3296 0 3263 36 24 12 17 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 296 0 0 18 0 18 18 0 8 0 bufpl 280 12550 0 6407 439 0 439 439 0 8 0 anonpl 32 12186 0 0 99 0 99 99 0 246 0 amapchunkpl 152 43276 0 42765 48 15 33 33 0 158 10 amappl16 200 5776 0 5741 58 44 14 26 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 118 0 106 1 0 1 1 0 8 0 amappl13 176 35 0 34 1 0 1 1 0 8 0 amappl12 168 2138 0 2107 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 53 0 51 1 0 1 1 0 8 0 amappl7 128 116 0 103 1 0 1 1 0 8 0 amappl6 120 180 0 176 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 310 0 288 1 0 1 1 0 8 0 amappl3 96 7404 0 7302 4 1 3 3 0 8 0 amappl2 88 1724 0 1644 2 0 2 2 0 8 0 amappl1 80 12690 0 12082 15 2 13 15 0 8 0 amappl 88 11529 0 11356 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 140 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1486 0 1455 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1486 0 1455 1 0 1 1 0 8 0 vmmpekpl 168 13358 0 13322 3 0 3 3 0 8 0 vmmpepl 168 97935 0 95912 116 9 107 110 0 357 13 vmsppl 488 1485 0 1455 5 1 4 5 0 8 0 rwobjpl 80 31832 0 26241 116 1 115 115 0 8 0 pdppl 4096 2980 0 2910 106 34 72 86 0 8 2 pvpl 32 23020 0 0 186 0 186 186 0 265 0 pmappl 256 1485 0 1455 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 307 0 55 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806e084b80,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e084b68,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e084b68,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805e35d6d0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805e35d6d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805e35d6d0,fffffd805e35d0e8,0,0,200,0,fb2a56d3317ee5cf) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805e35d6d0,fffffd805e35d0e8,ffff80002a270018) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ec89a00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000015deca8,ffff8000333e8518,ffff8000333e84c8,0,ffff8000333e8500,ffff8000333e868c,741bcf4de59a7c42) at soreceive+0xc24 sys/kern/uipc_socket.c:1009 recvit(ffff80002a270018,4,ffff8000333e8660,0,ffff8000333e8710) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80002a270018,ffff8000333e87c0,ffff8000333e8710) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff8000333e87c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333e87c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7400b757e00, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5