witness: userret: returning with the following locks held: exclusive rwlock solock r = 0 (0xfffffd8069b81bf8) #0 witness_lock+0x44d #1 unp_solock_peer+0x64 sys/kern/uipc_usrreq.c:168 #2 uipc_usrreq+0x7c6 sys/kern/uipc_usrreq.c:350 #3 sosend+0x61b sys/kern/uipc_socket.c:657 #4 sendit+0x65d sys/kern/uipc_syscalls.c:682 #5 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:589 #6 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 pWanAiRNcIN:G w:i StPneLs Ns_OTwa rLOn WERStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 263296 52317 32767 0x10 0 0 syz-executor.4 *501833 93115 32767 0x10 0x4000000 1 syz-executor.5 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82595df3) at panic+0x177 sys/kern/subr_prf.c:202 witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e witness_debugger sys/kern/subr_witness.c:2505 [inline] witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e sys/kern/subr_witness.c:1473 userret(ffff8000212587e8) at userret+0x265 sys/kern/kern_sig.c:2012 syscall(ffff80002e48c940) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e48c940) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f1119f21c0, count: 9 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: witness_warn ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82595df3) at panic+0x177 sys/kern/subr_prf.c:202 witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e witness_debugger sys/kern/subr_witness.c:2505 [inline] witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e sys/kern/subr_witness.c:1473 userret(ffff8000212587e8) at userret+0x265 sys/kern/kern_sig.c:2012 syscall(ffff80002e48c940) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e48c940) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f1119f21c0, count: -6 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e48c670 rbx 0xffff800020dd9bb7 rdx 0xffff800000bd4440 rcx 0 rax 0xffff8000212587e8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x307c945e556db6c1 r11 0x9378f05cdf2a265d r12 0xffff800020dd99b8 r13 0 r14 0 r15 0x1 rip 0xffffffff81844108 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e48c660 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=501833 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021259a48,0xffff8000212582b8 process=0xffff8000ffff29a0 user=0xffff80002e487000, vmspace=0xfffffd806c904010 estcpu=36, cpticks=4, pctcpu=0.0 user=0, sys=4, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52317 263296 29943 32767 7 0x10 syz-executor.4 97759 104775 68062 32767 3 0x90 nanoslp syz-executor.2 97759 121485 68062 32767 2 0x4000090 syz-executor.2 97759 181384 68062 32767 3 0x4000090 fsleep syz-executor.2 97759 81525 68062 32767 2 0x4000010 syz-executor.2 59351 160536 55977 32767 2 0x10 syz-executor.0 59351 158076 55977 32767 3 0x4000090 fsleep syz-executor.0 59351 366165 55977 32767 3 0x4000090 fsleep syz-executor.0 59351 151008 55977 32767 2 0x4000010 syz-executor.0 93115 430932 47859 32767 2 0x10 syz-executor.5 *93115 501833 47859 32767 7 0x4000010 syz-executor.5 35049 522516 1220 32767 2 0x10 syz-executor.6 35049 264922 1220 32767 3 0x4000090 fsleep syz-executor.6 92754 304642 30568 32767 2 0x10 syz-executor.7 92754 140291 30568 32767 3 0x4000090 fsleep syz-executor.7 35628 84562 61311 32767 2 0x10 syz-executor.1 35628 104389 61311 32767 3 0x4000090 netcon2 syz-executor.1 35628 502653 61311 32767 3 0x4000090 fsleep syz-executor.1 1220 100800 3778 32767 3 0x90 nanoslp syz-executor.6 3778 342027 84364 0 3 0x82 wait syz-executor.6 62096 489055 24285 32767 2 0x10 syz-executor.3 24285 71801 84364 0 3 0x82 wait syz-executor.3 62431 82119 0 0 3 0x14200 bored sosplice 30568 484663 82884 32767 2 0x490 syz-executor.7 82884 208031 84364 0 3 0x82 wait syz-executor.7 29943 293438 38460 32767 3 0x90 nanoslp syz-executor.4 47859 37953 5033 32767 3 0x90 nanoslp syz-executor.5 5033 438715 84364 0 3 0x82 wait syz-executor.5 68062 506651 85239 32767 3 0x90 nanoslp syz-executor.2 38460 159103 84364 0 3 0x82 wait syz-executor.4 85239 470063 84364 0 3 0x82 wait syz-executor.2 61311 127959 32200 32767 3 0x90 nanoslp syz-executor.1 32200 482384 84364 0 3 0x82 wait syz-executor.1 55977 210296 33870 32767 2 0x490 syz-executor.0 33870 131564 84364 0 3 0x82 wait syz-executor.0 84364 413974 11833 0 3 0x82 thrsleep syz-fuzzer 84364 159280 11833 0 2 0x4000082 syz-fuzzer 84364 385918 11833 0 3 0x4000082 thrsleep syz-fuzzer 84364 432106 11833 0 3 0x4000082 thrsleep syz-fuzzer 84364 345743 11833 0 3 0x4000082 kqread syz-fuzzer 84364 169884 11833 0 3 0x4000082 thrsleep syz-fuzzer 84364 286350 11833 0 3 0x4000082 nanoslp syz-fuzzer 84364 482145 11833 0 3 0x4000082 thrsleep syz-fuzzer 84364 64003 11833 0 3 0x4000082 thrsleep syz-fuzzer 11833 111511 25852 0 3 0x10008a sigsusp ksh 25852 122634 90876 0 2 0x9a sshd 13671 333538 1 0 3 0x100083 ttyin getty 90876 41822 1 0 3 0x88 kqread sshd 82001 228345 22256 73 2 0x1100010 syslogd 22256 51720 1 0 3 0x100082 netio syslogd 91875 315584 1 0 3 0x100080 kqread resolvd 77262 173824 53808 77 3 0x100092 kqread dhcpleased 4315 182926 53808 77 3 0x100092 kqread dhcpleased 53808 431085 1 0 3 0x80 kqread dhcpleased 33587 300768 0 0 3 0x14200 bored smr 94431 248965 0 0 2 0x14200 zerothread 93263 439356 0 0 3 0x14200 aiodoned aiodoned 16849 441845 0 0 3 0x14200 syncer update 87884 243822 0 0 3 0x14200 cleaner cleaner 1635 270927 0 0 3 0x14200 reaper reaper 35652 36939 0 0 3 0x14200 pgdaemon pagedaemon 71486 295995 0 0 3 0x14200 bored viomb 81435 155709 0 0 3 0x40014200 acpi0 acpi0 28195 214053 0 0 3 0x40014200 idle1 75595 344387 0 0 3 0x14200 bored softnet 82990 408827 0 0 3 0x14200 bored softnet 77882 397964 0 0 3 0x14200 bored softnet 41269 252147 0 0 3 0x14200 bored softnet 28437 500987 0 0 3 0x14200 bored systqmp 65133 193503 0 0 3 0x14200 bored systq 37904 406042 0 0 3 0x40014200 bored softclock 69577 507300 0 0 3 0x40014200 idle0 1 206872 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8066e9c3f0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1b8 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1b8 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1b8 sys/arch/amd64/amd64/pmap.c:2690 #4 uvm_fault_lower+0x77c sys/uvm/uvm_fault.c:1505 #5 uvm_fault+0x238 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 52317 (syz-executor.4) thread 0xffff8000fffe67f0 (263296) exclusive rwlock amaplk r = 0 (0xfffffd8066da3130) #0 witness_lock+0x44d #1 uvm_fault_check+0x422 sys/uvm/uvm_fault.c:783 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c904308) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1771 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 93115 (syz-executor.5) thread 0xffff8000212587e8 (501833) exclusive rwlock solock r = 0 (0xfffffd8069b81bf8) #0 witness_lock+0x44d #1 unp_solock_peer+0x64 sys/kern/uipc_usrreq.c:168 #2 uipc_usrreq+0x7c6 sys/kern/uipc_usrreq.c:350 #3 sosend+0x61b sys/kern/uipc_socket.c:657 #4 sendit+0x65d sys/kern/uipc_syscalls.c:682 #5 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:589 #6 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 82001 (syslogd) thread 0xffff8000ffff6d30 (228345) exclusive rrwlock inode r = 0 (0xfffffd806e6e7a30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:567 #5 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2939 #6 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10181 6408K 6420K 78643K 11280 0 pcb 13 10K 12K 78643K 15 0 rtable 236 6K 7K 78643K 606 0 ifaddr 81 16K 16K 78643K 103 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 62 0 ioctlops 0 0K 2K 78643K 41 0 iov 0 0K 28K 78643K 164 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1562 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 273 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 125K 78643K 1311 0 proc 56 78K 115K 78643K 591 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 315 0 in_multi 99 6K 6K 78643K 141 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 720 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 246 81K 82K 78643K 9329 0 UVM aobj 100 6K 6K 78643K 100 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 58 0 NDP 11 0K 2K 78643K 36 0 temp 124 4726K 4790K 78643K 6171 0 kqueue 13 20K 22K 78643K 94 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 212 0 209 4 2 2 3 0 8 1 rtentry 112 145 0 34 4 0 4 4 0 8 0 unpcb 144 1111 0 1096 14 10 4 6 0 8 3 syncache 296 23 0 23 5 4 1 1 0 8 1 tcpqe 32 12 0 12 4 4 0 1 0 8 0 tcpcb 736 678 0 668 26 22 4 14 0 8 2 arp 120 25 0 6 1 0 1 1 0 8 0 inpcb 320 1732 0 1717 23 19 4 12 0 8 1 nd6 48 33 0 9 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 585 0 132 29 0 29 29 0 8 0 art_table 32 586 0 132 4 0 4 4 0 8 0 art_node 16 144 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semapl 112 271 0 261 1 0 1 1 0 8 0 shmpl 112 97 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2993 0 1560 90 0 90 90 0 8 0 ffsino 272 2993 0 1560 96 0 96 96 0 8 0 nchpl 144 4735 0 3095 63 0 63 63 0 8 0 uvmvnodes 80 3145 0 0 65 0 65 65 0 8 0 vnodes 224 3145 0 0 185 0 185 185 0 8 0 namei 1024 16996 0 16996 2 1 1 2 0 8 1 percpumem 16 43 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scxspl 216 13146 0 13146 11 9 2 8 0 8 2 plimitpl 152 239 0 217 2 1 1 2 0 8 0 sigapl 424 1581 0 1527 7 0 7 7 0 8 0 futexpl 64 10364 0 10358 1 0 1 1 0 8 0 knotepl 120 109 0 0 4 0 4 4 0 8 0 kqueuepl 224 311 0 302 9 6 3 5 0 8 2 pipepl 336 546 0 517 13 5 8 8 0 8 5 fdescpl 496 1563 0 1527 7 1 6 6 0 8 0 filepl 152 11172 0 10929 31 13 18 19 0 8 8 lockfpl 104 176 0 174 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 26 0 10 1 0 1 1 0 8 0 pgrppl 48 41 0 25 1 0 1 1 0 8 0 ucredpl 104 2044 0 2026 1 0 1 1 0 8 0 zombiepl 144 1527 0 1527 1 0 1 1 0 8 1 processpl 1064 1581 0 1527 5 1 4 5 0 8 0 procpl 672 3942 0 3869 9 2 7 8 0 8 0 sosppl 168 20 0 19 3 2 1 1 0 8 0 sockpl 504 3076 0 3049 57 45 12 20 0 8 8 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 161 0 0 19 0 19 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 470 0 0 28 0 28 28 0 8 0 bufpl 288 4893 0 140 340 0 340 340 0 8 0 anonpl 24 298852 0 286454 108 28 80 100 0 186 0 amapchunkpl 152 25242 0 24611 30 4 26 27 0 158 0 amappl16 200 4525 0 4199 44 26 18 30 0 8 0 amappl15 192 501 0 494 1 0 1 1 0 8 0 amappl14 184 5 0 2 1 0 1 1 0 8 0 amappl13 176 100 0 96 1 0 1 1 0 8 0 amappl12 168 137 0 131 1 0 1 1 0 8 0 amappl11 160 83 0 68 1 0 1 1 0 8 0 amappl10 152 233 0 225 1 0 1 1 0 8 0 amappl9 144 601 0 597 1 0 1 1 0 8 0 amappl8 136 866 0 813 2 0 2 2 0 8 0 amappl7 128 392 0 378 1 0 1 1 0 8 0 amappl6 120 321 0 303 2 1 1 2 0 8 0 amappl5 112 1321 0 1292 1 0 1 1 0 8 0 amappl4 104 861 0 837 1 0 1 1 0 8 0 amappl3 96 4195 0 4134 2 0 2 2 0 8 0 amappl2 88 2009 0 1939 3 1 2 3 0 8 0 amappl1 80 38630 0 37898 19 3 16 19 0 8 0 amappl 88 8834 0 8655 6 1 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 128 253 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 99 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1563 0 1527 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1563 0 1527 1 0 1 1 0 8 0 vmmpekpl 168 17724 0 17685 3 0 3 3 0 8 0 vmmpepl 168 154033 0 151311 136 12 124 133 0 357 5 vmsppl 368 1562 0 1527 4 0 4 4 0 8 0 rwobjpl 56 42662 0 38093 68 3 65 65 0 8 0 pdppl 4096 3133 0 3054 163 82 81 95 0 8 2 pvpl 32 671057 0 653260 238 72 166 238 0 265 19 pmappl 248 1562 0 1527 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 883 0 157 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82925ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,52) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,52) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,52) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(52) at cnputc+0x4b sys/dev/cons.c:239 kputchar(52,5,0) at kputchar+0x1fe sys/kern/subr_prf.c:371 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:728 printf(ffffffff8268c536) at printf+0x75 sys/kern/subr_prf.c:533 proc_trampoline() at proc_trampoline+0xdb end of kernel end trace frame: 0x7f7ffffe5120, count: 5 ddb{0}> trace x86_ipi_db(ffffffff82925ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,52) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,52) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,52) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(52) at cnputc+0x4b sys/dev/cons.c:239 kputchar(52,5,0) at kputchar+0x1fe sys/kern/subr_prf.c:371 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:728 printf(ffffffff8268c536) at printf+0x75 sys/kern/subr_prf.c:533 proc_trampoline() at proc_trampoline+0xdb end of kernel end trace frame: 0x7f7ffffe5120, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82595df3) at panic+0x177 sys/kern/subr_prf.c:202 witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e witness_debugger sys/kern/subr_witness.c:2505 [inline] witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e sys/kern/subr_witness.c:1473 userret(ffff8000212587e8) at userret+0x265 sys/kern/kern_sig.c:2012 syscall(ffff80002e48c940) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e48c940) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f1119f21c0, count: 9 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82595df3) at panic+0x177 sys/kern/subr_prf.c:202 witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e witness_debugger sys/kern/subr_witness.c:2505 [inline] witness_warn(2,0,ffffffff8262507e) at witness_warn+0x65e sys/kern/subr_witness.c:1473 userret(ffff8000212587e8) at userret+0x265 sys/kern/kern_sig.c:2012 syscall(ffff80002e48c940) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e48c940) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f1119f21c0, count: -6