V:J%R ?-4*@GLntzr70|`$ܕ~r|겿8-)voڱ,r˘vx +Fv7F'Y]*ؑ ΥpMUscwdlo>$࿶;c āw!bxչj9ft63y.[eJ-mf=7*witness: lock order reversal: 1st 0xffff80000130f3e8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd8075350c50 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830be9a1 -> 0xffffffff8306b4aa is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 soreceive+0x295 sys/kern/uipc_socket.c:945 #3 fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b #6 vndsetcred+0xa1 sys/dev/vnd.c:684 #7 vndioctl+0xe6c sys/dev/vnd.c:485 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x67c #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 sosplice+0x3f4 sys/kern/uipc_socket.c:1454 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1228 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 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:437 witness_checkorder(fffffd8075350c50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd8075350c40,1) at rw_enter+0x122 rrw_enter(fffffd8075350c40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805fd30720,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805fd30720,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800031383708) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800031383708) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000130f240,fffffd8078c37f00,ffff80003479d6f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000130f240,fffffd807eb7d300,fffffd8078c37f00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000130f240,fffffd8078c37f00,ffff800031383998,0,0,0) at sosend+0xa40 sendit(ffff80003479d6f0,7,ffff800031383b10,0,ffff800031383bd0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff80003479d6f0,ffff800031383c80,ffff800031383bd0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800031383c80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800031383c80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf341a7952b0, count: -15 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff800031383360 rbx 0xfffffd80042c3570 rdx 0xffff8000012a4b00 rcx 0xffff80003479d6f0 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800031383240 r9 0x8080808080808080 r10 0x3a4b17d06b1388bb r11 0xf78268d8bc0fba14 r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800031383350 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=369775 pid=37599 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003479c538,0xffff80003479d478 process=0xffff800032b8fb08 user=0xffff80003137e000, vmspace=0xfffffd806bcf18e8 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14305 290748 58422 0 2 0x2 syz-executor 37599 9534 51306 0 7 0x10 syz-executor *37599 369775 51306 0 7 0x4000010 syz-executor 37599 107611 51306 0 3 0x4000090 fsleep syz-executor 83664 32199 461 0 2 0 syz-executor 83664 284332 461 0 3 0x4000080 fsleep syz-executor 66623 489245 71997 0 2 0 syz-executor 66623 178225 71997 0 3 0x4000080 ttyout syz-executor 66623 196597 71997 0 3 0x4000080 fsleep syz-executor 66623 169594 71997 0 3 0x4000080 fsleep syz-executor 25434 369917 30516 0 3 0x80 nanoslp syz-executor 25434 225569 30516 0 3 0x4000080 kqread syz-executor 25434 326037 30516 0 3 0x4000080 fsleep syz-executor 93671 408434 34763 0 3 0x80 nanoslp syz-executor 93671 277 34763 0 3 0x4000080 lockf syz-executor 93671 369449 34763 0 3 0x4000080 fsleep syz-executor 10608 123954 0 0 3 0x14200 acct acct 86266 306071 0 0 3 0x14200 bored sosplice 30516 393884 58422 0 3 0x82 nanoslp syz-executor 51306 9396 58422 0 3 0x82 nanoslp syz-executor 71997 318143 58422 0 3 0x82 nanoslp syz-executor 461 92043 58422 0 3 0x82 nanoslp syz-executor 2590 406776 58422 0 2 0x2 syz-executor 34763 24654 58422 0 3 0x82 nanoslp syz-executor 79924 487282 58422 0 3 0x82 wait syz-executor 58422 439115 47879 0 3 0x82 kqread syz-executor 47879 484322 81281 0 3 0x10008a sigsusp ksh 81281 174407 5555 0 3 0x98 kqread sshd-session 5555 97787 20146 0 3 0x92 kqread sshd-session 68942 286979 1 0 3 0x100083 ttyin getty 20146 145568 1 0 3 0x88 kqread sshd 63450 325364 95485 74 3 0x1100092 bpf pflogd 95485 316778 1 0 3 0x80 sbwait pflogd 15749 180393 69657 73 3 0x1100090 kqread syslogd 69657 346348 1 0 3 0x100082 sbwait syslogd 62685 460616 1 0 3 0x100080 kqread resolvd 97785 121680 96950 77 3 0x100092 kqread dhcpleased 11940 288527 96950 77 3 0x100092 kqread dhcpleased 96950 140795 1 0 3 0x80 kqread dhcpleased 75797 136516 0 0 3 0x14200 bored smr 89837 341162 0 0 3 0x14200 pgzero zerothread 40135 282304 0 0 3 0x14200 aiodoned aiodoned 94763 501895 0 0 3 0x14200 syncer update 77909 277492 0 0 3 0x14200 cleaner cleaner 54505 116592 0 0 3 0x14200 reaper reaper 17281 56516 0 0 3 0x14200 pgdaemon pagedaemon 72556 371150 0 0 3 0x14200 bored viomb 71671 484203 0 0 3 0x40014200 acpi0 acpi0 23245 56991 0 0 3 0x40014200 idle1 55706 15840 0 0 3 0x14200 bored softnet3 75004 46632 0 0 3 0x14200 bored softnet2 91603 461629 0 0 3 0x14200 bored softnet1 23936 215840 0 0 3 0x14200 bored softnet0 8807 180078 0 0 3 0x14200 bored systqmp 78069 317534 0 0 3 0x14200 bored systq 22921 265469 0 0 3 0x14200 tmoslp softclockmp 84704 310199 0 0 3 0x40014200 tmoslp softclock 55438 483986 0 0 3 0x40014200 idle0 1 39732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 14305 (syz-executor) thread 0xffff80003479d468 (290748) exclusive rwlock vmmaplk r = 0 (0xfffffd806bcf1ba0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1813 #3 uvm_fault_check+0x831 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #3 uvm_fault_check+0x831 sys/uvm/uvm_fault.c:712 #4 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 37599 (syz-executor) thread 0xffff80003479d6f0 (369775) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8359d538) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 pool_get+0x242 sys/kern/subr_pool.c:589 #5 namei+0xdf sys/kern/vfs_lookup.c:145 #6 unp_connect+0x27d sys/kern/uipc_usrreq.c:868 #7 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #8 sosend+0xa40 #9 sendit+0x721 sys/kern/uipc_syscalls.c:786 #10 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff80000130f3e8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sblock+0xb7 sys/kern/uipc_socket2.c:549 #3 sosend+0x2ff sys/kern/uipc_socket.c:681 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 2590 (syz-executor) thread 0xffff8000ffff7460 (406776) exclusive rwlock vmmaplk r = 0 (0xfffffd806bcf1660) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3820 #3 process_new+0x553 sys/kern/kern_fork.c:279 #4 fork1+0x3ea sys/kern/kern_fork.c:405 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806eebe9c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3811 #3 process_new+0x553 sys/kern/kern_fork.c:279 #4 fork1+0x3ea sys/kern/kern_fork.c:405 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 11202K 11577K 166960K 12597 0 pcb 18 14K 16K 166960K 265 0 rtable 180 5K 7K 166960K 450 0 pf 34 17K 18K 166960K 71 0 ifaddr 37 6K 7K 166960K 66 0 ifgroup 55 2K 2K 166960K 93 0 sysctl 2 0K 0K 166960K 2 0 counters 64 36K 36K 166960K 86 0 ioctlops 0 0K 4K 166960K 1600 0 iov 1 0K 20K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1425 89K 90K 166960K 2148 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 71 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 58K 89K 166960K 845 0 sigio 0 0K 0K 166960K 20 0 proc 72 91K 128K 166960K 603 0 subproc 91 5K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 80 0 in_multi 70 5K 7K 166960K 145 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 447 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 65K 78K 166960K 9717 0 UVM aobj 59 4K 4K 166960K 62 0 pinsyscall 42 84K 103K 166960K 1931 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 38 0 NDP 12 0K 1K 166960K 44 0 temp 72 6827K 6908K 166960K 29690 0 kqueue 13 20K 28K 166960K 128 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 135 0 132 3 2 1 3 0 8 0 rtentry 112 146 0 66 4 0 4 4 0 8 0 unpcb 144 493 0 470 4 3 1 4 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 357 0 352 8 7 1 8 0 8 0 arp 120 22 0 6 1 0 1 1 0 8 0 inpcb 336 1330 0 1316 15 13 2 13 0 8 0 nd6 136 33 0 15 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 1 1 0 1 1 0 8 0 ppxss 1168 6 0 6 2 1 1 1 0 8 1 pffrag 232 4 0 1 2 1 1 1 0 482 0 pffrnode 88 4 0 1 2 1 1 1 0 8 0 pffrent 40 10 0 7 2 1 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 pfstitem 24 82 0 17 1 0 1 1 0 8 0 pfstkey 128 82 0 17 3 0 3 3 0 8 0 pfstate 376 82 0 17 8 0 8 8 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 644 0 324 30 2 28 30 0 8 1 art_table 32 646 0 324 4 0 4 4 0 8 0 art_node 16 145 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 69 0 59 1 0 1 1 0 8 0 shmpl 112 59 0 3 2 0 2 2 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 2870 0 1366 95 0 95 95 0 8 0 ffsino 272 2870 0 1366 102 0 102 102 0 8 0 nchpl 144 4086 0 2403 63 0 63 63 0 8 0 uvmvnodes 80 3504 0 0 72 0 72 72 0 8 0 vnodes 216 3504 0 0 195 0 195 195 0 8 0 namei 1024 13692 0 13691 2 1 1 2 0 8 0 percpumem 16 57 0 11 1 0 1 1 0 8 0 kstatmem 264 46 0 22 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 12688 0 12688 11 10 1 8 1 8 1 plimitpl 152 131 0 113 1 0 1 1 0 8 0 sigapl 424 1150 0 1099 8 2 6 7 0 8 0 futexpl 64 10894 0 10888 1 0 1 1 0 8 0 knotepl 120 339 0 0 11 0 11 11 0 8 0 kqueuepl 216 189 0 179 2 1 1 2 0 8 0 pipepl 320 176 0 149 3 0 3 3 0 8 0 fdescpl 496 1129 0 1098 6 1 5 5 0 8 0 filepl 152 7062 0 6814 20 4 16 17 0 8 3 lockfpl 104 221 0 215 1 0 1 1 0 8 0 lockfspl 48 94 0 90 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 1028 0 1014 1 0 1 1 0 8 0 zombiepl 144 1238 0 1237 2 1 1 1 0 8 0 processpl 1160 1150 0 1099 5 1 4 5 0 8 0 procpl 648 2416 0 2355 8 2 6 7 0 8 0 srpgc 96 8 0 8 1 0 1 1 0 8 1 sosppl 168 5 0 5 1 1 0 1 0 8 0 sockpl 664 1977 0 1937 19 15 4 15 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 141 0 0 18 0 18 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 58 0 0 2 0 2 2 0 8 0 mbufpl 256 254 0 0 15 0 15 15 0 8 0 bufpl 280 6466 0 292 442 0 442 442 0 8 0 anonpl 24 178030 0 172342 68 25 43 65 0 185 0 amapchunkpl 152 31531 0 30949 37 10 27 36 0 158 0 amappl16 200 3810 0 3735 23 14 9 17 0 8 0 amappl15 192 36 0 36 1 1 0 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1772 0 1742 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 21 0 21 1 1 0 1 0 8 0 amappl9 144 219 0 218 1 0 1 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 106 0 94 1 0 1 1 0 8 0 amappl6 120 166 0 164 1 0 1 1 0 8 0 amappl5 112 130 0 119 1 0 1 1 0 8 0 amappl4 104 307 0 287 1 0 1 1 0 8 0 amappl3 96 5735 0 5639 3 0 3 3 0 8 0 amappl2 88 1391 0 1306 3 1 2 3 0 8 0 amappl1 80 9870 0 9299 15 1 14 14 0 8 0 amappl 88 9287 0 9108 5 0 5 5 0 92 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 128 256 0 256 3 2 1 1 0 8 1 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 61 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1129 0 1098 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1129 0 1098 1 0 1 1 0 8 0 vmmpekpl 168 10415 0 10376 2 0 2 2 0 8 0 vmmpepl 168 74252 0 72349 98 7 91 97 0 357 1 vmsppl 448 1128 0 1098 6 2 4 5 0 8 0 rwobjpl 56 25537 0 20977 65 0 65 65 0 8 0 pdppl 4096 2265 0 2196 103 32 71 83 0 8 2 pvpl 32 17708 0 0 144 1 143 143 0 265 0 pmappl 248 1128 0 1098 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 412 0 62 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8349fff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff800037205830,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8359d330) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff800037205990,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff8359d330) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7f6cb42bdc80, 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:437 witness_checkorder(fffffd8075350c50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd8075350c40,1) at rw_enter+0x122 rrw_enter(fffffd8075350c40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805fd30720,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805fd30720,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800031383708) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800031383708) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000130f240,fffffd8078c37f00,ffff80003479d6f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000130f240,fffffd807eb7d300,fffffd8078c37f00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000130f240,fffffd8078c37f00,ffff800031383998,0,0,0) at sosend+0xa40 sendit(ffff80003479d6f0,7,ffff800031383b10,0,ffff800031383bd0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff80003479d6f0,ffff800031383c80,ffff800031383bd0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800031383c80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800031383c80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf341a7952b0, count: -15