witness: lock order reversal: 1st 0xffff800010fdc9d8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd80704b15c0 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8333eb82 -> 0xffffffff833873c0 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:890 #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+0xdfc 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:775 #12 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd80704b15c0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd80704b15a8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd80704b15a8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd800e3dfb08,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd800e3dfb08,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd800e3dfb08,fffffd800e3dfbe0,0,0,200,0,33b61c1f23e5a62) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd800e3dfb08,fffffd800e3dfbe0,ffff80003c416d20) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd807ea16900,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff800010fdc8e8,ffff80003c415718,ffff80003c4156c8,0,ffff80003c415700,ffff80003c41588c,9eaed3df81a9c4ba) at soreceive+0xc24 sys/kern/uipc_socket.c:1029 recvit(ffff80003c416d20,4,ffff80003c415860,0,ffff80003c415910) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003c416d20,ffff80003c4159c0,ffff80003c415910) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c4159c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4159c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x20744530d70, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c4151a0 rbx 0 rdx 0xffff80000158c280 rcx 0xffff80003c416d20 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c415080 r9 0x8080808080808080 r10 0xfbc89ce153393b9b r11 0x3c475efc8423ea29 r12 0xfffffd8003f59880 r13 0xfffffd8004741708 r14 0x3 r15 0xffffffff83421e46 substchar+0xccdf rip 0xffffffff81428175 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c415190 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=428068 pid=93538 tcnt=2 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=0xffff80003c4162c0,0xffff80003c417a28 process=0xffff80003c4189c0 user=0xffff80003c410000, vmspace=0xfffffd806c983b88 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94372 5953 31957 0 2 0 syz-executor 93538 293779 90293 0 2 0x1000000 syz-executor *93538 428068 90293 0 7 0x5000000 syz-executor 69130 22885 54405 0 2 0 syz-executor 69130 395563 54405 0 2 0x4000000 syz-executor 45343 398082 50167 0 7 0 syz-executor 45343 491375 50167 0 3 0x4000080 fsleep syz-executor 45343 170433 50167 0 2 0x4000000 syz-executor 1375 287960 61934 0 2 0 syz-executor 1375 44181 61934 0 3 0x4000080 ttyretype syz-executor 89213 157333 48805 0 2 0 syz-executor 89213 30634 48805 0 3 0x4000080 fsleep syz-executor 89213 490103 48805 0 3 0x4000080 fsleep syz-executor 99258 284873 98200 0 2 0 syz-executor 99258 469479 98200 0 3 0x4000000 biowait syz-executor 99258 66432 98200 0 3 0x4000000 fltagain2 syz-executor 99258 100827 98200 0 3 0x4000080 fsleep syz-executor 78893 420595 59396 0 2 0 syz-executor 78893 77584 59396 0 3 0x4000080 sbwait syz-executor 78893 320052 59396 0 3 0x4000080 fsleep syz-executor 90293 348212 2972 0 3 0x82 nanoslp syz-executor 59396 393794 2972 0 3 0x82 nanoslp syz-executor 98200 265593 2972 0 3 0x82 nanoslp syz-executor 50167 355325 2972 0 3 0x82 nanoslp syz-executor 54405 463237 2972 0 3 0x82 nanoslp syz-executor 31957 440117 2972 0 3 0x82 nanoslp syz-executor 48805 364034 2972 0 3 0x82 nanoslp syz-executor 61934 501177 2972 0 3 0x82 nanoslp syz-executor 2972 329042 33401 0 3 0x82 kqread syz-executor 33401 480247 65680 0 3 0x10008a sigsusp ksh 65680 131032 67767 0 3 0x98 kqread sshd-session 67767 234088 37002 0 3 0x92 kqread sshd-session 71852 365845 1 0 3 0x100083 ttyin getty 37002 14558 1 0 3 0x88 kqread sshd 93191 38703 41773 74 3 0x1100092 bpf pflogd 41773 471728 1 0 3 0x80 sbwait pflogd 91808 440269 74689 73 3 0x1100090 kqread syslogd 74689 12174 1 0 3 0x100082 sbwait syslogd 88176 160591 1 0 3 0x100080 kqread resolvd 8131 5145 37314 77 3 0x100092 kqread dhcpleased 23415 158337 37314 77 3 0x100092 kqread dhcpleased 37314 41820 1 0 3 0x80 kqread dhcpleased 85767 59791 0 0 3 0x14200 bored smr 33018 307267 0 0 2 0x14200 zerothread 91331 44685 0 0 3 0x14200 aiodoned aiodoned 60759 469603 0 0 3 0x14200 syncer update 81058 73309 0 0 3 0x14200 cleaner cleaner 75416 478494 0 0 3 0x14200 reaper reaper 20648 62003 0 0 3 0x14200 pgdaemon pagedaemon 8410 157676 0 0 3 0x14200 bored viomb 31628 259781 0 0 3 0x40014200 acpi0 acpi0 55468 405800 0 0 3 0x40014200 idle1 365 490270 0 0 3 0x14200 bored softnet1 93967 481179 0 0 2 0x14200 softnet0 4183 142928 0 0 3 0x14200 bored systqmp 8647 232722 0 0 3 0x14200 bored systq 24022 57311 0 0 3 0x14200 tmoslp softclockmp 57108 346770 0 0 3 0x40014200 tmoslp softclock 25447 117215 0 0 3 0x40014200 idle0 1 350717 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 93538 (syz-executor) thread 0xffff80003c416d20 (428068) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83952040) #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:1029 #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:775 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff800010fdc9d8) #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:890 #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:775 #7 Xsyscall+0x128 Process 99258 (syz-executor) thread 0xffff80003affca80 (469479) exclusive rrwlock inode r = 0 (0xfffffd806c9278f8) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 78893 (syz-executor) thread 0xffff8000fffee548 (77584) exclusive rrwlock inode r = 0 (0xfffffd806c927330) #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+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #9 namei+0x7ca sys/kern/vfs_lookup.c:250 #10 vn_open+0x15a sys/kern/vfs_vnops.c:140 #11 vndioctl+0xc43 sys/dev/vnd.c:458 #12 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #13 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #14 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #15 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #15 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #16 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11052 12084K 12093K 166960K 12150 0 pcb 18 12K 12K 166960K 22 0 rtable 246 9K 9K 166960K 364 0 pf 38 18K 22K 166960K 54 0 ifaddr 44 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1468 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1371 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 158 0 sigio 0 0K 0K 166960K 2 0 proc 71 115K 164K 166960K 535 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 2 0 in_multi 103 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 375 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 159K 169K 166960K 3359 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 101K 166960K 1282 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 28 2K 2K 166960K 29 0 temp 35 8670K 8734K 166960K 4122 0 kqueue 13 20K 24K 166960K 26 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 35 0 32 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 51 0 27 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 11 0 7 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 81 0 73 1 0 1 1 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfrule 1360 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1604 0 88 95 0 95 95 0 8 0 ffsino 296 1604 0 88 117 0 117 117 0 8 0 nchpl 144 1826 0 125 64 0 64 64 0 8 0 vnodes 216 1692 0 0 94 0 94 94 0 8 0 namei 1024 5521 0 5521 1 0 1 1 0 8 1 percpumem 16 51 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 28 0 2 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6242 0 6241 3 1 2 2 1 8 1 plimitpl 152 30 0 11 1 0 1 1 0 8 0 sigapl 424 466 0 418 7 0 7 7 0 8 1 knotepl 120 153 0 0 5 0 5 5 0 8 0 kqueuepl 224 26 0 16 1 0 1 1 0 8 0 pipepl 344 117 0 90 3 0 3 3 0 8 0 fdescpl 528 450 0 418 3 0 3 3 0 8 0 filepl 160 1666 0 1443 10 0 10 10 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 103 0 89 1 0 1 1 0 8 0 zombiepl 144 418 0 418 1 0 1 1 0 8 1 processpl 1232 466 0 418 5 0 5 5 0 8 0 procpl 664 512 0 452 6 0 6 6 0 8 0 sockpl 752 169 0 134 4 0 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 128 0 0 8 0 8 8 0 8 0 bufpl 280 2518 0 129 171 0 171 171 0 8 0 anonpl 32 3955 0 0 32 0 32 32 0 246 0 amapchunkpl 152 9314 0 8819 22 0 22 22 0 158 1 amappl16 200 2155 0 2089 5 0 5 5 0 8 1 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 9 0 9 1 0 1 1 0 8 1 amappl13 176 433 0 432 1 0 1 1 0 8 0 amappl12 168 808 0 766 3 0 3 3 0 8 1 amappl11 160 10 0 10 1 0 1 1 0 8 1 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 0 1 1 0 8 1 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 277 0 263 1 0 1 1 0 8 0 amappl5 112 90 0 80 1 0 1 1 0 8 0 amappl4 104 409 0 380 1 0 1 1 0 8 0 amappl3 96 1424 0 1330 4 1 3 3 0 8 0 amappl2 88 555 0 483 2 0 2 2 0 8 0 amappl1 80 9092 0 8494 15 0 15 15 0 8 1 amappl 88 2627 0 2464 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 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 128 253 0 253 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 451 0 419 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 451 0 419 1 0 1 1 0 8 0 vmmpekpl 168 5516 0 5482 2 0 2 2 0 8 0 vmmpepl 168 36900 0 34912 87 0 87 87 0 357 0 vmsppl 488 450 0 419 5 0 5 5 0 8 1 rwobjpl 80 13849 0 12787 23 0 23 23 0 8 0 pdppl 4096 909 0 838 95 12 83 83 0 8 12 pvpl 32 10634 0 0 87 1 86 86 0 265 0 pmappl 256 450 0 419 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 260 0 14 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff838a8ff0) 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 __mp_lock(ffffffff83951840) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951840) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff800030fcf320,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83951840) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951840) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff800030fcf480,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7dd9c352cb40, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd80704b15c0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd80704b15a8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd80704b15a8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd800e3dfb08,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd800e3dfb08,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd800e3dfb08,fffffd800e3dfbe0,0,0,200,0,33b61c1f23e5a62) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd800e3dfb08,fffffd800e3dfbe0,ffff80003c416d20) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd807ea16900,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff800010fdc8e8,ffff80003c415718,ffff80003c4156c8,0,ffff80003c415700,ffff80003c41588c,9eaed3df81a9c4ba) at soreceive+0xc24 sys/kern/uipc_socket.c:1029 recvit(ffff80003c416d20,4,ffff80003c415860,0,ffff80003c415910) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003c416d20,ffff80003c4159c0,ffff80003c415910) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c4159c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4159c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x20744530d70, count: -14