login: witness: lock order reversal: 1st 0xffff80000149a108 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806bae2578 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{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(fffffd806bae2578,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806bae2560,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806bae2560,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd8066b97390,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd8066b97390,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd8066b97390,fffffd8066b97390,0,0,200,0,f21e0fcb89b28e21) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd8066b97390,fffffd8066b97390,ffff8000fffe94e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806c63ad00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff80000149a018,ffff80003c434688,ffff80003c434638,0,ffff80003c434670,ffff80003c4347fc,c37840f63fd3d004) at soreceive+0xc24 sys/kern/uipc_socket.c:1009 recvit(ffff8000fffe94e0,4,ffff80003c4347d0,0,ffff80003c434880) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff8000fffe94e0,ffff80003c434930,ffff80003c434880) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c434930) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c434930) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x50cd4b4cec0, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c434120 rbx 0 rdx 0xffff80000147f740 rcx 0xffff8000fffe94e0 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c434000 r9 0x8080808080808080 r10 0xedffce28a0b3669b r11 0x660faae92a56117e r12 0xfffffd8003eff640 r13 0xfffffd80046e7680 r14 0x3 r15 0xffffffff833e2b64 substchar+0xf1da rip 0xffffffff831577a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c434110 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=469726 pid=62477 tcnt=2 stat=onproc flags process=1000000 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe87e8,0xffff8000fffe8030 process=0xffff8000fffef038 user=0xffff80003c42f000, vmspace=0xfffffd806e3f57b0 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55051 266828 18953 0 2 0 syz-executor 55051 125396 18953 0 2 0x4000000 syz-executor 62477 375821 99804 0 2 0x1000000 syz-executor *62477 469726 99804 0 7 0x5000000 syz-executor 67722 333225 96518 0 2 0 syz-executor 67722 88515 96518 0 3 0x4000080 fsleep syz-executor 67722 198208 96518 0 3 0x4000080 fsleep syz-executor 67722 410156 96518 0 3 0x4000080 fsleep syz-executor 67722 445931 96518 0 3 0x4000080 fsleep syz-executor 78574 358995 42202 0 2 0 syz-executor 78574 193981 42202 0 3 0x4000080 ttyout syz-executor 78574 400124 42202 0 3 0x4000080 fsleep syz-executor 72473 385745 0 0 3 0x14280 nfsidl nfsio 40254 368902 0 0 3 0x14280 nfsidl nfsio 68823 498322 0 0 3 0x14280 nfsidl nfsio 26254 352808 0 0 3 0x14280 nfsidl nfsio 8096 426086 1 0 3 0x100083 ttyin getty 1390 339473 0 0 3 0x14200 acct acct 11009 3771 99211 0 3 0x2 biowait syz-executor 75722 96011 0 0 3 0x14200 bored sosplice 82206 446056 99211 0 2 0x2 syz-executor 96518 221261 99211 0 3 0x82 nanoslp syz-executor 1483 287020 99211 0 3 0x82 nanoslp syz-executor 97245 119624 99211 0 7 0x2 syz-executor 99804 59095 99211 0 3 0x82 nanoslp syz-executor 42202 401363 99211 0 3 0x82 nanoslp syz-executor 18953 106971 99211 0 3 0x82 nanoslp syz-executor 99211 6785 86162 0 3 0x82 kqread syz-executor 86162 480654 84363 0 3 0x10008a sigsusp ksh 84363 39858 65751 0 3 0x98 kqread sshd-session 65751 269054 29156 0 3 0x92 kqread sshd-session 29156 393364 1 0 3 0x88 kqread sshd 71934 107373 53735 74 3 0x1100092 bpf pflogd 53735 11792 1 0 3 0x80 sbwait pflogd 67756 239923 6074 73 3 0x1100090 kqread syslogd 6074 62488 1 0 3 0x100082 sbwait syslogd 26832 386599 1 0 3 0x100080 kqread resolvd 74446 478172 93573 77 3 0x100092 kqread dhcpleased 57099 114484 93573 77 3 0x100092 kqread dhcpleased 93573 267890 1 0 3 0x80 kqread dhcpleased 41236 427973 0 0 3 0x14200 bored smr 19566 322135 0 0 2 0x14200 zerothread 20980 68480 0 0 3 0x14200 aiodoned aiodoned 70536 121956 0 0 3 0x14200 syncer update 44355 342755 0 0 3 0x14200 cleaner cleaner 29652 77053 0 0 3 0x14200 reaper reaper 76838 137305 0 0 3 0x14200 pgdaemon pagedaemon 76791 497747 0 0 3 0x14200 bored viomb 99589 488136 0 0 3 0x40014200 acpi0 acpi0 16387 445979 0 0 3 0x40014200 idle1 90365 310942 0 0 3 0x14200 bored softnet1 20147 493991 0 0 2 0x14200 softnet0 14249 52445 0 0 3 0x14200 bored systqmp 79381 82721 0 0 3 0x14200 bored systq 58525 249437 0 0 3 0x14200 tmoslp softclockmp 59003 411232 0 0 3 0x40014200 tmoslp softclock 43460 118974 0 0 3 0x40014200 idle0 1 381976 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 62477 (syz-executor) thread 0xffff8000fffe94e0 (469726) 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 (0xffff80000149a108) #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 11009 (syz-executor) thread 0xffff8000fffe8550 (3771) exclusive rrwlock inode r = 0 (0xfffffd806bae27c8) #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 (0xfffffd806e1a2ed0) #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 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 11018K 11473K 166960K 12622 0 pcb 17 12K 12K 166960K 141 0 rtable 149 6K 7K 166960K 386 0 pf 32 17K 22K 166960K 136 0 ifaddr 31 5K 7K 166960K 89 0 ifgroup 47 2K 2K 166960K 154 0 sysctl 1 1K 9K 166960K 8 0 counters 64 36K 37K 166960K 156 0 ioctlops 0 0K 4K 166960K 1591 0 iov 0 0K 16K 166960K 43 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1330 84K 84K 166960K 2139 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 616K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 93K 166960K 2182 0 sigio 0 0K 0K 166960K 9 0 proc 72 115K 164K 166960K 664 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 149 0 in_multi 63 4K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 486 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 221 167K 185K 166960K 19347 0 UVM aobj 3 2K 3K 166960K 5 0 pinsyscall 40 80K 107K 166960K 3342 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 53 0 NDP 10 0K 2K 166960K 62 0 temp 53 8649K 8777K 166960K 62719 0 kqueue 13 20K 26K 166960K 184 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 97 0 94 1 0 1 1 0 8 0 rtentry 176 127 0 67 5 0 5 5 0 8 0 unpcb 144 421 0 402 1 0 1 1 0 8 0 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpcb 736 205 0 200 1 0 1 1 0 8 0 arp 136 15 0 4 1 0 1 1 0 8 0 inpcb 328 625 0 616 2 0 2 2 0 8 1 nd6 152 22 0 11 1 0 1 1 0 8 0 pkpcb 40 9 0 9 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 31 0 31 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 17 0 11 1 0 1 1 0 8 0 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 56 0 20 1 0 1 1 0 8 0 pfstkey 128 56 0 20 2 0 2 2 0 8 0 pfstate 384 56 0 20 4 0 4 4 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 4 0 4 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 634 0 356 28 5 23 28 0 8 1 art_table 40 636 0 356 5 0 5 5 0 8 0 art_node 32 125 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 2 0 2 1 1 0 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 4563 0 3052 95 0 95 95 0 8 0 ffsino 296 4563 0 3052 117 0 117 117 0 8 0 nchpl 144 7053 0 5360 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 5041 0 0 103 0 103 103 0 8 0 vnodes 216 5041 0 0 281 0 281 281 0 8 0 namei 1024 18039 0 18039 2 1 1 2 0 8 1 percpumem 16 93 0 46 1 0 1 1 0 8 0 kstatmem 264 90 0 68 5 2 3 3 0 8 1 scsiplug 72 8 0 8 1 1 0 1 0 8 0 scxspl 216 24031 0 24029 9 8 1 6 1 8 0 plimitpl 152 132 0 113 1 0 1 1 0 8 0 sigapl 424 2500 0 2449 8 1 7 7 0 8 0 knotepl 120 505 0 0 16 0 16 16 0 8 0 kqueuepl 224 217 0 208 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 2475 0 2446 3 0 3 3 0 8 0 filepl 160 6499 0 6278 10 0 10 10 0 8 0 lockfpl 104 419 0 417 1 0 1 1 0 8 0 lockfspl 48 175 0 173 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 954 0 941 1 0 1 1 0 8 0 zombiepl 144 2450 0 2449 1 0 1 1 0 8 0 processpl 1232 2500 0 2449 5 0 5 5 0 8 0 procpl 664 4805 0 4746 6 0 6 6 0 8 0 sockpl 752 1167 0 1136 4 0 4 4 0 8 0 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 329 0 0 21 0 21 21 0 8 0 bufpl 280 8359 0 2216 439 0 439 439 0 8 0 anonpl 32 7823 0 0 65 1 64 64 0 246 0 amapchunkpl 152 65997 0 65577 31 6 25 29 0 158 4 amappl16 200 5222 0 5171 34 21 13 16 0 8 8 amappl15 192 37 0 37 1 1 0 1 0 8 0 amappl14 184 129 0 117 1 0 1 1 0 8 0 amappl13 176 20 0 20 1 1 0 1 0 8 0 amappl12 168 3152 0 3123 3 1 2 2 0 8 0 amappl11 160 62 0 48 1 0 1 1 0 8 0 amappl10 152 3 0 2 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 32 0 30 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 190 0 187 1 0 1 1 0 8 0 amappl5 112 128 0 119 1 0 1 1 0 8 0 amappl4 104 323 0 304 1 0 1 1 0 8 0 amappl3 96 12185 0 12101 4 1 3 3 0 8 0 amappl2 88 2735 0 2661 2 0 2 2 0 8 0 amappl1 80 17646 0 17053 18 3 15 15 0 8 0 amappl 88 18495 0 18347 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 4 0 2 1 0 1 1 0 8 0 uaddrrnd 24 2475 0 2446 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2475 0 2446 1 0 1 1 0 8 0 vmmpekpl 168 16899 0 16856 3 0 3 3 0 8 0 vmmpepl 168 149202 0 147305 105 6 99 100 0 357 7 vmsppl 488 2474 0 2446 6 1 5 5 0 8 0 rwobjpl 80 39861 0 33893 123 0 123 123 0 8 0 pdppl 4096 4958 0 4892 112 40 72 88 0 8 6 pvpl 32 15472 0 0 125 0 125 125 0 265 0 pmappl 256 2474 0 2446 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 308 0 55 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(ffffffff837efff0) 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(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3760e0,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a376240,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 dofstatat(ffff80002a271ca0,ffffff9c,7de6af0735b0,7de6af0739b0,2) at dofstatat+0xe1 sys/kern/vfs_syscalls.c:2086 syscall(ffff80002a3765c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3765c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7de6af073a60, count: -13 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(fffffd806bae2578,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806bae2560,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806bae2560,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd8066b97390,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd8066b97390,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd8066b97390,fffffd8066b97390,0,0,200,0,f21e0fcb89b28e21) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd8066b97390,fffffd8066b97390,ffff8000fffe94e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806c63ad00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff80000149a018,ffff80003c434688,ffff80003c434638,0,ffff80003c434670,ffff80003c4347fc,c37840f63fd3d004) at soreceive+0xc24 sys/kern/uipc_socket.c:1009 recvit(ffff8000fffe94e0,4,ffff80003c4347d0,0,ffff80003c434880) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff8000fffe94e0,ffff80003c434930,ffff80003c434880) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c434930) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c434930) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x50cd4b4cec0, count: -14